[sage-support] Links between worksheets
Hi all, I can have a link on one worksheet to another worksheet (e.g. http://localhost:8000/home/user/12/), but this includes the number that sage internally gives that worksheet (here: 12). Now if I upload these worksheets to another server, they are assigned different numbers and the links don't work properly anymore. Is there a any other way of linking in a more stable way, e.g. using the title of a worksheet? Also, can I have a link that goes to a certain place within a worksheet? Cheers, Maike --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Secure Sage Server
We'd like to set up a sage server allowing different users to see, copy and edit our published worksheets. However, this allows users to execute arbitrary system calls, e.g. os.popen(ps auxw).read() The formatting of the output is not perfect, but still, this is a problem! I'd be grateful for any suggestions on how to set up a SECURE sage server. If this has been covered elsewhere, just post the link... Thanks! Maike --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Secure Sage Server
On Sep 24, 12:22 am, Maike [EMAIL PROTECTED] wrote: Hi Maike, We'd like to set up a sage server allowing different users to see, copy and edit our published worksheets. However, this allows users to execute arbitrary system calls, e.g. os.popen(ps auxw).read() Yes, any account on a Notebook server hands the user a shell, so you either trust them or you secure the server itself. The formatting of the output is not perfect, but still, this is a problem! I'd be grateful for any suggestions on how to set up a SECURE sage server. If this has been covered elsewhere, just post the link... There are a couple possibilities: a) a chroot jail b) a VMWare image (or some other kind of virtualization) c) SELinux, potentially in combination with (a) None of the above is simple and securing a server so that it runs with SELinux is difficult. There is no documentation on how to do this yet. I would favor (b), frequent backups of the Sage notebook data and some intrusion detection system in the notebook in addition to keeping kernel and all the other components current to avoid break ins. Since you are running a VMware image it is easily resettable and the likelyhood of breaking out of the VMWare image is relatively small. So should you have somebody break into your box it is much easier to reset an image than the server. If you come up with something we would definitely like to hear about it. Thanks! Maike Cheers, Michael --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Numerical evaluate of the Dirichlet character value
Hi, I want to have a numerical value of a Dirichlet character : I have this line code in my notebook: sage: G = DirichletGroup(21) chi = G.1; chi(23) evaluate: zeta6 - 1 And when i want to use this value: zeta6 - 1 i have the error message: G = DirichletGroup(21) chi = G.1; chi(23) B=13*chi(23) print float(B) error message: Traceback (most recent call last): File stdin, line 1, in module File /home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ 6.py, line 10, in module print float(B) File /home/server2/sage/local/lib/python2.5/site-packages/ SQLAlchemy-0.4.6-py2.5.egg/, line 1, in module TypeError: float() argument must be a string or a number. --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Numerical evaluate of the Dirichlet character value
On Sep 24, 4:15 am, Raouf [EMAIL PROTECTED] wrote: Hi, I want to have a numerical value of a Dirichlet character : I have this line code in my notebook: sage: G = DirichletGroup(21) chi = G.1; chi(23) evaluate: zeta6 - 1 And when i want to use this value: zeta6 - 1 i have the error message: G = DirichletGroup(21) chi = G.1; chi(23) B=13*chi(23) print float(B) error message: Traceback (most recent call last): File stdin, line 1, in module File /home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ 6.py, line 10, in module print float(B) File /home/server2/sage/local/lib/python2.5/site-packages/ SQLAlchemy-0.4.6-py2.5.egg/, line 1, in module TypeError: float() argument must be a string or a number. Looks like a bug to me. The usual trick (at least in my book of using n() does also not work): [EMAIL PROTECTED]:/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1$ ./ sage -- | SAGE Version 3.1.3.alpha1, Release Date: 2008-09-24| | Type notebook() for the GUI, and license() for information.| -- sage: G = DirichletGroup(21) sage: chi = G.1; sage: chi(23) zeta6 - 1 sage: B=13*chi(23) sage: print float(B) --- TypeError Traceback (most recent call last) /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/ipython console in module() TypeError: float() argument must be a string or a number sage: type(B) type 'sage.rings.number_field.number_field_element_quadratic.NumberFieldElement_quadratic' sage: n(B) --- TypeError Traceback (most recent call last) /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/ipython console in module() /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/python/ site-packages/sage/misc/functional.py in numerical_approx(x, prec, digits) 716 return sage.rings.real_mpfr.RealField_constructor(prec)(x) 717 except TypeError: -- 718 return sage.rings.complex_field.ComplexField(prec) (x) 719 720 n = numerical_approx /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/python2.5/ site-packages/sage/rings/complex_field.py in __call__(self, x, im) 212 except AttributeError: 213 pass -- 214 return complex_number.ComplexNumber(self, x, im) 215 216 def _coerce_impl(self, x): /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/complex_number.pyx in sage.rings.complex_number.ComplexNumber.__init__ (sage/rings/ complex_number.c:2519)() TypeError: unable to coerce to a ComplexNumber sage: Can someone more knowledgeable in the area open a ticket? Cheers, Michael --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Numerical evaluate of the Dirichlet character value
This works: sage: emb = B.parent().complex_embeddings()[0] sage: emb(B) -6.5 + 11.2583302492*I B is an element of a number field: sage: B.parent() Cyclotomic Field of order 6 and degree 2 and number fields have several embeddings into CC (in this case, 2): sage: len( B.parent().complex_embeddings()) 2 You have complete control over precision: sage: emb = B.parent().complex_embeddings(prec=200)[0] sage: emb(B) -6.50 + 11.258330249197702407928401219788170385128234149767474082363*I John Cremona 2008/9/24 Raouf [EMAIL PROTECTED]: Hi, I want to have a numerical value of a Dirichlet character : I have this line code in my notebook: sage: G = DirichletGroup(21) chi = G.1; chi(23) evaluate: zeta6 - 1 And when i want to use this value: zeta6 - 1 i have the error message: G = DirichletGroup(21) chi = G.1; chi(23) B=13*chi(23) print float(B) error message: Traceback (most recent call last): File stdin, line 1, in module File /home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ 6.py, line 10, in module print float(B) File /home/server2/sage/local/lib/python2.5/site-packages/ SQLAlchemy-0.4.6-py2.5.egg/, line 1, in module TypeError: float() argument must be a string or a number. --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Sage runs amok when killing a sub process
On Sep 24, 5:18 am, Simon King [EMAIL PROTECTED] wrote: Dear Team, Hi Simon, on a linux machine with 4 Dual Core AMD Opteron(tm) Processor 270, I had some computations with Sage 3.1.1. One of them had a very long Singular sub process, and eventually I killed the sub process. By consequence, a massive amount (more than 20) of new Python processes popped up (see below for a small part of what top shows). I don't see why 20 of those python jobs would pop up. Can you reproduce it? Fortunately the other Sage processes on that machine have not been affected. Nonetheless, I wonder if this is a bug. The output from top as is is useless since there is no information to gain. One would at least need PPID and the command line option used to start the python jobs. It looks like you are ending up with something that could turn into a zombie, but since it is unclear what exactly you did this is undebuggable as is. Cheers Simon Cheers, Michael --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: operations with matrices
Hi, well, I have now two different alternatives to be tested: a list of matrices or a numpy array. since I am programming with scripts, I should verify which of them works better in that case. thanks for your suggestions!! Aniura On Sep 23, 12:29 pm, John Cremona [EMAIL PROTECTED] wrote: 2008/9/23 Simon King [EMAIL PROTECTED]: On Sep 23, 3:31 pm, John Cremona [EMAIL PROTECTED] wrote: The rest of your query is hard to interpret. To create a list of equal elements, say a list of 5 copies of the matrix m, do this: sage: [m]*5 But this would not create a list of 5 *copies* of m. The five entries of that list are one and the same object, namely m: Excellent point, thanks for correcting me! --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Sage runs amok when killing a sub process
Dear Michael, On Sep 24, 2:25 pm, mabshoff [EMAIL PROTECTED] dortmund.de wrote: I don't see why 20 of those python jobs would pop up. Can you reproduce it? I used nohup, and stdout was written into some file. And I just found one detail in the log file that may help to track it down. It says (with my comments after #) Singular crashed executing def sage43815=is_fregs(sage43812,COHO1I); # one of my Singular functions Singular data for 625gp7 are being deleted # This message comes from a __del__ method of my objects - see below Singular crashed -- automatically restarting. Singular crashed -- automatically restarting. Singular crashed -- automatically restarting. ... And I think this is the explanation: - Singular crashes, so there is an error, and Sage tries to cleanly exit. - A clean exit means that all objects are deallocated. - In my case, a __del__ method is called whose job it is to kill all data (related to the object) that live in the Singular sub process. - The sub process is dead, so a restart is attempted. Hence, I think everything is fine on the side of Sage, but in my __del__ method I should better test whether the Singular sub process is still valid. Cheers Simon --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Small Scale Variants of the AES (SR)
Thanks for the useful links, Martin. I downloaded and compiled the source for Sage (3.1.2). I'll have a look at crypto/mq/sr.py and i'll try to figure how to add my code there. If i have questions i'll ask. Cheers, vpv On Sep 19, 6:48 pm, Martin Albrecht [EMAIL PROTECTED] wrote: * I'd be very happy if you'd share your code! I would like to make sure that it fits into the current framework/is compatible and reuses the existing machinery. Are you doing that? I don't think so. What should I do to make my code to fit in the SAGE framework? Maybe there are some guidelines for developers? The only link i found was this onehttp://www.sagemath.org/development.html Hi there, at http://sage.math.washington.edu/home/mhansen/doc-sphinx/SageDeveloper... you'll find a prerelease of the new developer's guide. Some parts are not finished/polished but it should answer at least some questions. My main point however is that the implementation of this functionality should be in crypto/mq/sr.py (i.e. in the classes for SR) and re-use the methods provided there (for consistency). Let me know if you need help. * If we're going to support direct representation of ciphertext bits in plaintext and key variables we should also support GF(2^n) as base field not only GF(2), i.e. BES style equations. This will be slightly more involving. Anyway I was already thinking of developing a version of my code for GF(2^n), so I would gladly help with this. Excellent! Cheers, Martin -- name: Martin Albrecht _pgp:http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x8EF0DC99 _www:http://www.informatik.uni-bremen.de/~malb _jab: [EMAIL PROTECTED] --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] how to calculate the derivative of a boolean polynomial?
Is it possible to calculate the derivative of a boolean polynomial in Sage using PolyBoRi? I can do this for polynomials over GF(2): sage: R.x,y,x = PolynomialRing(GF(2),3) sage: f = 3*x^2*y + 2*x*y + y + 9*x^2 + 5*x - 3 sage: f x^2*y + x^2 + x + y + 1 sage: f.derivative(x) 1 sage: f.derivative(y) x^2 + 1 However I cannot do the same for boolean polynomials: sage: B.x,y,z = BooleanPolynomialRing(3) sage: f = 3*x^2*y + 2*x*y + y + 9*x^2 + 5*x - 3 sage: f x*y + y + 1 sage: f.derivative(x) AttributeError: 'sage.rings.polynomial.pbori.BooleanPolynomial' object has no attribute '_derivative' sage: Maybe this is not implemented or maybe i am not doing sth. right? Thanks for your help! --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Secure Sage Server
mabshoff wrote: On Sep 24, 12:22 am, Maike [EMAIL PROTECTED] wrote: Hi Maike, We'd like to set up a sage server allowing different users to see, copy and edit our published worksheets. However, this allows users to execute arbitrary system calls, e.g. os.popen(ps auxw).read() Yes, any account on a Notebook server hands the user a shell, so you either trust them or you secure the server itself. The formatting of the output is not perfect, but still, this is a problem! I'd be grateful for any suggestions on how to set up a SECURE sage server. If this has been covered elsewhere, just post the link... There are a couple possibilities: a) a chroot jail b) a VMWare image (or some other kind of virtualization) c) SELinux, potentially in combination with (a) None of the above is simple and securing a server so that it runs with SELinux is difficult. There is no documentation on how to do this yet. I would favor (b), frequent backups of the Sage notebook data and some intrusion detection system in the notebook in addition to keeping kernel and all the other components current to avoid break ins. Since you are running a VMware image it is easily resettable and the likelyhood of breaking out of the VMWare image is relatively small. So should you have somebody break into your box it is much easier to reset an image than the server. If you come up with something we would definitely like to hear about it. In case virtualbox is your preference, I have almost finished a virtualbox image which tries to mirror the current vmware image too, but is based on ubuntu jeos and is a little more locked down (e.g., no default ssh server is running). Thanks, Jason --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] libsvm unser Sage
Hi, I have a question about libsvm using under Sage. I have downloaded libsvm (a Support Vector Machine classification library) which comes with a python interface. I did build the sources as follows : [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ ll total 208 -rw-r--r-- 1 jlandre jlandre 1140 2004-03-24 12:44 cross_validation.py -rw-r--r-- 1 jlandre jlandre582 2007-10-14 08:29 Makefile -rw-r--r-- 1 jlandre jlandre 5023 2008-02-19 00:09 README -rw-r--r-- 1 jlandre jlandre 2731 2007-03-31 02:31 svmc.i -rw-r--r-- 1 jlandre jlandre 169031 2007-03-31 02:31 svmc_wrap.c -rw-r--r-- 1 jlandre jlandre 8140 2006-12-08 15:37 svm.py -rwxr-xr-x 1 jlandre jlandre 2110 2006-07-28 02:09 svm_test.py -rwxr-xr-x 1 jlandre jlandre630 2003-07-12 06:07 test_cross_validation.py [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ make PYTHON_INCLUDEDIR=/usr/local/sage/sage/local/include/python2.5 all g++ -O3 -I/usr/local/sage/sage/local/include/python2.5 -I.. -fPIC -c svmc_wrap.c g++ -O3 -I/usr/local/sage/sage/local/include/python2.5 -I.. -fPIC - c ../svm.cpp g++ -shared -o svmc.so svmc_wrap.o svm.o [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ ll total 648 -rw-r--r-- 1 jlandre jlandre 1140 2004-03-24 12:44 cross_validation.py -rw-r--r-- 1 jlandre jlandre582 2007-10-14 08:29 Makefile -rw-r--r-- 1 jlandre jlandre 5023 2008-02-19 00:09 README -rw-r--r-- 1 jlandre jlandre 2731 2007-03-31 02:31 svmc.i -rwxr-xr-x 1 jlandre jlandre 160033 2008-09-24 17:30 svmc.so -rw-r--r-- 1 jlandre jlandre 169031 2007-03-31 02:31 svmc_wrap.c -rw-r--r-- 1 jlandre jlandre 180992 2008-09-24 17:30 svmc_wrap.o -rw-r--r-- 1 jlandre jlandre 89912 2008-09-24 17:30 svm.o -rw-r--r-- 1 jlandre jlandre 8140 2006-12-08 15:37 svm.py -rwxr-xr-x 1 jlandre jlandre 2110 2006-07-28 02:09 svm_test.py -rwxr-xr-x 1 jlandre jlandre630 2003-07-12 06:07 test_cross_validation.py As you can see, I passed the path of the Sage python installation to the Makefile and everything was OK. I obtain a library file named svmc.so. My question is where do I have to put it under the Sage directory in order to use it ? Thanks in advance for your nice reply, have a nice day wherever you are in the world... Regards, Jérôme Landré University of Reims-Champagne-Ardenne France --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Using Fourier transform in sage.
Thank you! :-) sage: v = vector(CDF,[1..10]); v (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0) sage: w = v.fft(); w (55.0, -5.0 + 15.3884176859*I, -5.0 + 6.88190960236*I, -5.0 + 3.63271264003*I, -5.0 + 1.62459848116*I, -5.0, -5.0 - 1.62459848116*I, -5.0 - 3.63271264003*I, -5.0 - 6.88190960236*I, -5.0 - 15.3884176859*I) sage: w.inv_fft() (1.0 - 8.881784197e-17*I, 2.0 - 3.7437131288e-16*I, 3.0 + 4.15667297272e-18*I, 4.0 + 4.46859877911e-16*I, 5.0 + 4.33797144802e-16*I, 6.0 - 8.881784197e-17*I, 7.0 + 4.61256576967e-17*I, 8.0 + 2.04083553579e-16*I, 9.0 - 3.67679530233e-16*I, 10.0 - 2.15336379908e-16*I) Thanks. -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: question about SAGE eigenvalues
On Sep 23, 1:26 pm, Jason Grout [EMAIL PROTECTED] wrote: To me, it looks like it may be a bug: sage: A=matrix([[1,1],[2,3]]) sage: e1,e2=A.eigenvalues() sage: e1.interval(ComplexIntervalField(53)) 0.2679491924311228? sage: b=e1.interval(ComplexIntervalField(53)) sage: b 0.2679491924311228? sage: b.str(style='brackets') '[0.26794919243112269 .. 0.26794919243112276]' The question mark notation indicates that this last interval (the real interval) should lie inside of [0.2679491924311227 .. 0.2679491924311229] But it doesn't seem to lie in that range. Carl, what do you think? Yes, the above sure looks like a bug to me. I'll try to look at it sometime this week (over the weekend, if not sooner). Carl --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: question about SAGE eigenvalues
On Sep 23, 1:31 pm, Jason Grout [EMAIL PROTECTED] wrote: OK, it is a feature. To quote from http://wiki.sagemath.org/sage-3.1.2(Release notes for 3.1.2): The question marks at the end of the numbers in the previous example mean that Sage is printing out an approximation of an exact value that it uses. In particular, the question mark means that the last digit can vary by plus or minus 1. In other words, 32.46424919657298? means that the exact number is really between 32.46424919657297 and 32.46424919657299. Sage knows what the exact number is and uses the exact number in calculations. That last sentence is technically incorrect, I think (sorry; I wrote it). It might be better to say, Sage carries out the calculations using interval arithmetic and essentially uses infinite precision in these cases. Carl, is there some way to word things better? I think the sentence from the release notes is fine. Elements of QQbar are exact algebraic numbers; the fact that QQbar uses interval arithmetic internally is an implementation detail that shouldn't matter to the user. (It would be nice if users of QQbar had no reason to even know about the interval arithmetic used internally. For the sake of efficiency, though, I don't always print the best possible approximation to a number, so the intervals are somewhat exposed to the user when they print QQbar elements.) Carl --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Can not delete worksheet.
Thank you )) now its OK On Sep 21, 5:25 pm, Timothy Clemans [EMAIL PROTECTED] wrote: Hi, This and other bugs have been fixed in the latest release, 3.1.2. Timothy On Sun, Sep 21, 2008 at 7:23 AM, Sand Wraith [EMAIL PROTECTED] wrote: Hi! Using sage: SAGE Version 3.1.1, Release Date: 2008-08-17 and can not delete worksheet: 1) select worksheet test 2) press delete 3) now i can see test worksheet in Trash, 4) press sign out 5) stop sage 6) launch sage again 7) and now i see test worksheet in active section again! --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Numerical evaluate of the Dirichlet character value
On Sep 24, 2008, at 4:42 AM, John Cremona wrote: 2008/9/24 mabshoff [EMAIL PROTECTED]: On Sep 24, 4:15 am, Raouf [EMAIL PROTECTED] wrote: Hi, I want to have a numerical value of a Dirichlet character : I have this line code in my notebook: sage: G = DirichletGroup(21) chi = G.1; chi(23) evaluate: zeta6 - 1 And when i want to use this value: zeta6 - 1 i have the error message: G = DirichletGroup(21) chi = G.1; chi(23) B=13*chi(23) print float(B) error message: Traceback (most recent call last): File stdin, line 1, in module File /home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ 6.py, line 10, in module print float(B) File /home/server2/sage/local/lib/python2.5/site-packages/ SQLAlchemy-0.4.6-py2.5.egg/, line 1, in module TypeError: float() argument must be a string or a number. Looks like a bug to me. The usual trick (at least in my book of using n() does also not work): [EMAIL PROTECTED]:/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1$ ./ sage - - | SAGE Version 3.1.3.alpha1, Release Date: 2008-09-24| | Type notebook() for the GUI, and license() for information.| - - sage: G = DirichletGroup(21) sage: chi = G.1; sage: chi(23) zeta6 - 1 sage: B=13*chi(23) sage: print float(B) - -- TypeError Traceback (most recent call last) /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/ipython console in module() TypeError: float() argument must be a string or a number sage: type(B) type 'sage.rings.number_field.number_field_element_quadratic.NumberFieldEl ement_quadratic' sage: n(B) - -- TypeError Traceback (most recent call last) /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/ipython console in module() /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/python/ site-packages/sage/misc/functional.py in numerical_approx(x, prec, digits) 716 return sage.rings.real_mpfr.RealField_constructor(prec)(x) 717 except TypeError: -- 718 return sage.rings.complex_field.ComplexField (prec) (x) 719 720 n = numerical_approx /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/local/lib/ python2.5/ site-packages/sage/rings/complex_field.py in __call__(self, x, im) 212 except AttributeError: 213 pass -- 214 return complex_number.ComplexNumber(self, x, im) 215 216 def _coerce_impl(self, x): /scratch/mabshoff/release-cycle/sage-3.1.3.alpha1/complex_number.pyx in sage.rings.complex_number.ComplexNumber.__init__ (sage/rings/ complex_number.c:2519)() TypeError: unable to coerce to a ComplexNumber sage: Can someone more knowledgeable in the area open a ticket? I'm not sure quite what the ticket would propose. We could have a method n() for number field elements which maps the element into CC using the first available complex embedding and a precision given by a prec parameter. But I think number theorists are more likely to want to have control over their embeddings, as in my sample solution. Under the new coercion model (not ported yet, but high on the todo list), one can create number fields with default embeddings, which may make sense to do here. - Robert --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: how to calculate the derivative of a boolean polynomial?
On Sep 24, 2008, at 7:09 AM, vpv wrote: Is it possible to calculate the derivative of a boolean polynomial in Sage using PolyBoRi? I can do this for polynomials over GF(2): sage: R.x,y,x = PolynomialRing(GF(2),3) sage: f = 3*x^2*y + 2*x*y + y + 9*x^2 + 5*x - 3 sage: f x^2*y + x^2 + x + y + 1 sage: f.derivative(x) 1 sage: f.derivative(y) x^2 + 1 However I cannot do the same for boolean polynomials: sage: B.x,y,z = BooleanPolynomialRing(3) sage: f = 3*x^2*y + 2*x*y + y + 9*x^2 + 5*x - 3 sage: f x*y + y + 1 sage: f.derivative(x) AttributeError: 'sage.rings.polynomial.pbori.BooleanPolynomial' object has no attribute '_derivative' sage: Maybe this is not implemented or maybe i am not doing sth. right? It looks like this is not implemented. - Robert --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Numerical evaluate of the Dirichlet character value
` On Wed, Sep 24, 2008 at 4:42 AM, John Cremona [EMAIL PROTECTED] wrote: 2008/9/24 mabshoff [EMAIL PROTECTED]: On Sep 24, 4:15 am, Raouf [EMAIL PROTECTED] wrote: Hi, I want to have a numerical value of a Dirichlet character : I have this line code in my notebook: sage: G = DirichletGroup(21) chi = G.1; chi(23) evaluate: zeta6 - 1 And when i want to use this value: zeta6 - 1 i have the error message: G = DirichletGroup(21) chi = G.1; chi(23) B=13*chi(23) print float(B) error message: Traceback (most recent call last): File stdin, line 1, in module File /home/server2/nb1/sage_notebook/worksheets/fstthese/0/code/ 6.py, line 10, in module print float(B) File /home/server2/sage/local/lib/python2.5/site-packages/ SQLAlchemy-0.4.6-py2.5.egg/, line 1, in module TypeError: float() argument must be a string or a number. Looks like a bug to me. The usual trick (at least in my book of using n() does also not work): [EMAIL PROTECTED]:/scratch/mabshoff/release-cycle/sage-3.1.3.alpha1$ ./ sage -- | SAGE Version 3.1.3.alpha1, Release Date: 2008-09-24| | Type notebook() for the GUI, and license() for information.| -- sage: G = DirichletGroup(21) sage: chi = G.1; sage: chi(23) zeta6 - 1 sage: B=13*chi(23) sage: print float(B) B cannot be be coerced to a float, since B is a complex number with nontrivial imaginary part. It definitely should raise a TypeError as it does. That said, it would be good to make it so this works, which would be a good thing to open as a ticket. sage: G = DirichletGroup(21) sage: B = 23* G.1(23) sage: B 23*zeta6 - 23 sage: complex(B) --- TypeError Traceback (most recent call last) William --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: libsvm unser Sage
On Wed, Sep 24, 2008 at 8:42 AM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, I have a question about libsvm using under Sage. I have downloaded libsvm (a Support Vector Machine classification library) which comes with a python interface. I did build the sources as follows : [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ ll total 208 -rw-r--r-- 1 jlandre jlandre 1140 2004-03-24 12:44 cross_validation.py -rw-r--r-- 1 jlandre jlandre582 2007-10-14 08:29 Makefile -rw-r--r-- 1 jlandre jlandre 5023 2008-02-19 00:09 README -rw-r--r-- 1 jlandre jlandre 2731 2007-03-31 02:31 svmc.i -rw-r--r-- 1 jlandre jlandre 169031 2007-03-31 02:31 svmc_wrap.c -rw-r--r-- 1 jlandre jlandre 8140 2006-12-08 15:37 svm.py -rwxr-xr-x 1 jlandre jlandre 2110 2006-07-28 02:09 svm_test.py -rwxr-xr-x 1 jlandre jlandre630 2003-07-12 06:07 test_cross_validation.py [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ make PYTHON_INCLUDEDIR=/usr/local/sage/sage/local/include/python2.5 all g++ -O3 -I/usr/local/sage/sage/local/include/python2.5 -I.. -fPIC -c svmc_wrap.c g++ -O3 -I/usr/local/sage/sage/local/include/python2.5 -I.. -fPIC - c ../svm.cpp g++ -shared -o svmc.so svmc_wrap.o svm.o [EMAIL PROTECTED]:~/actuel/recherche/libs/libsvm-2.86/python$ ll total 648 -rw-r--r-- 1 jlandre jlandre 1140 2004-03-24 12:44 cross_validation.py -rw-r--r-- 1 jlandre jlandre582 2007-10-14 08:29 Makefile -rw-r--r-- 1 jlandre jlandre 5023 2008-02-19 00:09 README -rw-r--r-- 1 jlandre jlandre 2731 2007-03-31 02:31 svmc.i -rwxr-xr-x 1 jlandre jlandre 160033 2008-09-24 17:30 svmc.so -rw-r--r-- 1 jlandre jlandre 169031 2007-03-31 02:31 svmc_wrap.c -rw-r--r-- 1 jlandre jlandre 180992 2008-09-24 17:30 svmc_wrap.o -rw-r--r-- 1 jlandre jlandre 89912 2008-09-24 17:30 svm.o -rw-r--r-- 1 jlandre jlandre 8140 2006-12-08 15:37 svm.py -rwxr-xr-x 1 jlandre jlandre 2110 2006-07-28 02:09 svm_test.py -rwxr-xr-x 1 jlandre jlandre630 2003-07-12 06:07 test_cross_validation.py As you can see, I passed the path of the Sage python installation to the Makefile and everything was OK. I obtain a library file named svmc.so. My question is where do I have to put it under the Sage directory in order to use it ? What happens if -- from the same directory that svmc.so is in -- you run Sage and type sage: import svmc sage: svmc.[press the tab key] sage: help(svmc) sage: dir(svmc) Thanks in advance for your nice reply, have a nice day wherever you are in the world... Regards, Jérôme Landré University of Reims-Champagne-Ardenne France -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Generating all subgroups of a group
A homework exercise for my students asks them to find all subgroups of S_4, which should be a very instructive exercise, even if a bit unreasonable. In SAGE, the conjugacy_classes_subgroups() method gets you started, and the quick-and-dirty brute-force code below creates all possible subgroups by doing the necessary conjugations. Is there a SAGE command that will do something similar? Are there SAGE commands that will make the code below more efficient? (The routine below takes about 30 seconds on my reasonably powerful machine.) A subgroups command would be very useful command for students learning group theory and experimenting, though time and space might quickly become a problem. Any thoughts? G = SymmetricGroup(4) conj_sg = G.conjugacy_classes_subgroups() all_sg=[] for representative_sg in conj_sg: for g in G: new_sg=[] for h in representative_sg: new_sg.append(g^-1*h*g) new_sg.sort() if not(new_sg in all_sg): all_sg.append(new_sg) for sg in all_sg: print sg --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Generating all subgroups of a group
On Wed, Sep 24, 2008 at 7:29 PM, Rob Beezer [EMAIL PROTECTED] wrote: A homework exercise for my students asks them to find all subgroups of S_4, which should be a very instructive exercise, even if a bit unreasonable. In SAGE, the conjugacy_classes_subgroups() method gets you started, and the quick-and-dirty brute-force code below creates all possible subgroups by doing the necessary conjugations. GAP has code for finding low index subgroups. Here's some Sage code to find all subgroups up to a certain index in the (3,3,3) triangle group: ## p = 3 q = 3 r = 3 F = gap.new(FreeGroup(3)) gens = list(gap.GeneratorsOfGroup(F)) rho1 = gens[0] rho2 = gens[1] rho3 = gens[2] triangle_group = F.FactorGroupFpGroupByRels([F.1*F.2*F.3, \ F.1**p, F.2**q, F.3**r]) iter = gap.LowIndexSubgroupsFpGroupIterator(triangle_group, \ gap.TrivialSubgroup(triangle_group), 30) while str(gap.IsDoneIterator(iter)) == 'false': H = gap.NextIterator(iter) nr_points = gap.Index(triangle_group, H) G = gap.Image(gap.ActionHomomorphism(triangle_group, \ gap.RightCosets(triangle_group, H), gap.OnRight)) print gap.Order(G) ## I have plans to write a Cython wrapper for LOWX some time, see http://designtheory.org/~peter/software/lowx/ -- Carlo Hamalainen http://carlo-hamalainen.net --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Generating all subgroups of a group
On Wed, Sep 24, 2008 at 2:05 PM, Carlo Hamalainen [EMAIL PROTECTED] wrote: On Wed, Sep 24, 2008 at 7:29 PM, Rob Beezer [EMAIL PROTECTED] wrote: A homework exercise for my students asks them to find all subgroups of S_4, which should be a very instructive exercise, even if a bit unreasonable. In SAGE, the conjugacy_classes_subgroups() method gets you started, and the quick-and-dirty brute-force code below creates all possible subgroups by doing the necessary conjugations. GAP has code for finding low index subgroups. Here's some Sage code to find all subgroups up to a certain index in the (3,3,3) triangle group: ## p = 3 q = 3 r = 3 F = gap.new(FreeGroup(3)) gens = list(gap.GeneratorsOfGroup(F)) rho1 = gens[0] rho2 = gens[1] rho3 = gens[2] triangle_group = F.FactorGroupFpGroupByRels([F.1*F.2*F.3, \ F.1**p, F.2**q, F.3**r]) iter = gap.LowIndexSubgroupsFpGroupIterator(triangle_group, \ gap.TrivialSubgroup(triangle_group), 30) while str(gap.IsDoneIterator(iter)) == 'false': H = gap.NextIterator(iter) nr_points = gap.Index(triangle_group, H) G = gap.Image(gap.ActionHomomorphism(triangle_group, \ gap.RightCosets(triangle_group, H), gap.OnRight)) print gap.Order(G) ## I have plans to write a Cython wrapper for LOWX some time, see http://designtheory.org/~peter/software/lowx/ Thanks in advance! -- Carlo Hamalainen http://carlo-hamalainen.net --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Generating all subgroups of a group
In Rob's example it would be nice (and good for the students to see) if instead of looping over all g in G to construct conjugate subgroups he could loop over coset representatives of H in G (where H is his representative_subgroup), or (optimal) coset reps of the normalizer of H in G. Now we can already compute HG=H.normalizer(G) in Sage directly, but I cannot see a way of getting a list of coset reps. Presumably Gap can do this, so perhaps wrapping that function would be worthwhile. I did a search_src(transversal) and indeed found (in the file coding/binary_code.pyx) reference to a Gap function RightTransversal. John Cremona 2008/9/24 Carlo Hamalainen [EMAIL PROTECTED]: On Wed, Sep 24, 2008 at 7:29 PM, Rob Beezer [EMAIL PROTECTED] wrote: A homework exercise for my students asks them to find all subgroups of S_4, which should be a very instructive exercise, even if a bit unreasonable. In SAGE, the conjugacy_classes_subgroups() method gets you started, and the quick-and-dirty brute-force code below creates all possible subgroups by doing the necessary conjugations. GAP has code for finding low index subgroups. Here's some Sage code to find all subgroups up to a certain index in the (3,3,3) triangle group: ## p = 3 q = 3 r = 3 F = gap.new(FreeGroup(3)) gens = list(gap.GeneratorsOfGroup(F)) rho1 = gens[0] rho2 = gens[1] rho3 = gens[2] triangle_group = F.FactorGroupFpGroupByRels([F.1*F.2*F.3, \ F.1**p, F.2**q, F.3**r]) iter = gap.LowIndexSubgroupsFpGroupIterator(triangle_group, \ gap.TrivialSubgroup(triangle_group), 30) while str(gap.IsDoneIterator(iter)) == 'false': H = gap.NextIterator(iter) nr_points = gap.Index(triangle_group, H) G = gap.Image(gap.ActionHomomorphism(triangle_group, \ gap.RightCosets(triangle_group, H), gap.OnRight)) print gap.Order(G) ## I have plans to write a Cython wrapper for LOWX some time, see http://designtheory.org/~peter/software/lowx/ -- Carlo Hamalainen http://carlo-hamalainen.net --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Windows: Where are worksheets stored?
Hi, switching to the latest release 3.1.2 on windows machines I would like to save my workbooks. but where are they stored? Sorry for my ignorance since my question seems to be a FAQ. As always, thanks for your help. Best wishes, J. --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: libsvm unser Sage
Hi, When I start Sage in the directory where python libsvm was built, It seems to work but I have another problem to run the test_script : -- | SAGE Version 3.1.2, Release Date: 2008-09-19 | | Type notebook() for the GUI, and license() for information.| -- sage: import svmc sage: sv svm.osvm_test.py svmc.i svmc_wrap.c svm.py svmc svmc.so svmc_wrap.o sage: svmc. svmc.C_SVC svmc.svm_parameter_C_set svmc.EPSILON_SVR svmc.svm_parameter_cache_size_get svmc.LINEAR svmc.svm_parameter_cache_size_set svmc.NU_SVC svmc.svm_parameter_coef0_get svmc.NU_SVR svmc.svm_parameter_coef0_set svmc.ONE_CLASS svmc.svm_parameter_degree_get svmc.POLYsvmc.svm_parameter_degree_set svmc.PRECOMPUTED svmc.svm_parameter_eps_get svmc.RBF svmc.svm_parameter_eps_set svmc.SIGMOID svmc.svm_parameter_gamma_get svmc.delete_double svmc.svm_parameter_gamma_set svmc.delete_int svmc.svm_parameter_kernel_type_get svmc.delete_svm_parameter svmc.svm_parameter_kernel_type_set svmc.delete_svm_problem svmc.svm_parameter_nr_weight_get svmc.double_getitem svmc.svm_parameter_nr_weight_set svmc.double_setitem svmc.svm_parameter_nu_get svmc.i svmc.svm_parameter_nu_set svmc.int_getitem svmc.svm_parameter_p_get svmc.int_setitem svmc.svm_parameter_p_set svmc.new_double svmc.svm_parameter_probability_get svmc.new_int svmc.svm_parameter_probability_set svmc.new_svm_parameter svmc.svm_parameter_shrinking_get svmc.new_svm_problem svmc.svm_parameter_shrinking_set svmc.so svmc.svm_parameter_svm_type_get svmc.svm_check_parameter svmc.svm_parameter_svm_type_set svmc.svm_check_probability_model svmc.svm_parameter_weight_get svmc.svm_cross_validation svmc.svm_parameter_weight_label_get svmc.svm_destroy_model svmc.svm_parameter_weight_label_set svmc.svm_get_labels svmc.svm_parameter_weight_set svmc.svm_get_nr_classsvmc.svm_predict svmc.svm_get_svm_typesvmc.svm_predict_probability svmc.svm_get_svr_probability svmc.svm_predict_values svmc.svm_load_model svmc.svm_problem_l_get svmc.svm_node_array svmc.svm_problem_l_set svmc.svm_node_array_destroy svmc.svm_problem_x_get svmc.svm_node_array_set svmc.svm_problem_x_set svmc.svm_node_matrix svmc.svm_problem_y_get svmc.svm_node_matrix_destroy svmc.svm_problem_y_set svmc.svm_node_matrix_set svmc.svm_save_model svmc.svm_parameter_C_get svmc.svm_train sage: help(svmc) sage: dir(svmc) ['C_SVC', 'EPSILON_SVR', 'LINEAR', 'NU_SVC', 'NU_SVR', 'ONE_CLASS', 'POLY', 'PRECOMPUTED', 'RBF', 'SIGMOID', '__doc__', '__file__', '__name__', 'delete_double', 'delete_int', 'delete_svm_parameter', 'delete_svm_problem', 'double_getitem', 'double_setitem', 'int_getitem', 'int_setitem', 'new_double', 'new_int', 'new_svm_parameter', 'new_svm_problem', 'svm_check_parameter', 'svm_check_probability_model', 'svm_cross_validation', 'svm_destroy_model', 'svm_get_labels', 'svm_get_nr_class', 'svm_get_svm_type', 'svm_get_svr_probability', 'svm_load_model', 'svm_node_array', 'svm_node_array_destroy', 'svm_node_array_set', 'svm_node_matrix', 'svm_node_matrix_destroy', 'svm_node_matrix_set', 'svm_parameter_C_get', 'svm_parameter_C_set', 'svm_parameter_cache_size_get', 'svm_parameter_cache_size_set', 'svm_parameter_coef0_get', 'svm_parameter_coef0_set', 'svm_parameter_degree_get', 'svm_parameter_degree_set', 'svm_parameter_eps_get', 'svm_parameter_eps_set', 'svm_parameter_gamma_get', 'svm_parameter_gamma_set', 'svm_parameter_kernel_type_get', 'svm_parameter_kernel_type_set', 'svm_parameter_nr_weight_get', 'svm_parameter_nr_weight_set', 'svm_parameter_nu_get', 'svm_parameter_nu_set', 'svm_parameter_p_get', 'svm_parameter_p_set', 'svm_parameter_probability_get', 'svm_parameter_probability_set', 'svm_parameter_shrinking_get', 'svm_parameter_shrinking_set', 'svm_parameter_svm_type_get', 'svm_parameter_svm_type_set', 'svm_parameter_weight_get', 'svm_parameter_weight_label_get', 'svm_parameter_weight_label_set', 'svm_parameter_weight_set', 'svm_predict', 'svm_predict_probability', 'svm_predict_values', 'svm_problem_l_get', 'svm_problem_l_set', 'svm_problem_x_get', 'svm_problem_x_set', 'svm_problem_y_get', 'svm_problem_y_set', 'svm_save_model', 'svm_train'] sage: svm_test.py
[sage-support] Re: maple from sage on mac os
Hi William:
The same thing happens to me on Mac OS X. How do i fix this?
Alex
--
| SAGE Version 3.1.2, Release Date: 2008-09-19 |
| Type notebook() for the GUI, and license() for information.|
--
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/1910//
inter
sage: maple('3*5')
15
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/1910//
inter
sage: maple('3*5')
sage1
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/1910//
inter
sage: maple('3*5')
sage2
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/1910//
inter
sage: maple('3*5')
sage9
On Aug 26, 8:42 pm, William Stein [EMAIL PROTECTED] wrote:
On Sat, Aug 23, 2008 at 3:12 AM, G. Edgar [EMAIL PROTECTED] wrote:
I tried this again...
Thanks. Is there any chance I could get a temporary login shell on
your machine?
If you don't know how to do this, it would be easy for your sysadmin. That's
the only sure way to just get this fixed.
William
--
| SAGE Version 3.1.1, Release Date: 2008-08-17 |
| Type notebook() for the GUI, and license() for information. |
--
sage: maple('8+3')
sage: maple('8+3')
read /Users/edgar/.sage//temp/cpe_75_187_61_115.columbus.res.rr.com/
6804/
sage: maple('8+3')
11
sage: maple('8+3')
sage: maple('8+3')
read /Users/edgar/.sage//temp/cpe_75_187_61_115.columbus.res.rr.com/
6804/
sage: maple('8+3')
sage1
sage: maple('8+3')
sage: maple('8+3')
read /Users/edgar/.sage//temp/cpe_75_187_61_115.columbus.res.rr.com/
6804/
sage: maple('8+3')
sage2
sage: maple('8+3')
sage: maple('8+3')
read /Users/edgar/.sage//temp/cpe_75_187_61_115.columbus.res.rr.com/
6804/
sage: maple('8+3')
sage9
sage:
--
William Stein
Associate Professor of Mathematics
University of Washingtonhttp://wstein.org
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] Re: a problem starting the notebook
so? On 23 sep, 01:35, cesarnda [EMAIL PROTECTED] wrote: I start sage and I type notebook and firefox is open to the following address: http://localhost:8000/?startup_token=1af26f2b14cac678ab97c121c9cca7c5 which is not found, so I have to cut it just tohttp://localhost:8000, is there a way to solve this problem? --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: maple from sage on mac os
On Sep 24, 3:20 pm, Alex Raichev [EMAIL PROTECTED] wrote: Hi William: The same thing happens to me on Mac OS X. How do i fix this? Alex Hi Alex, I don't know how handy you are with patches and so on, but applying the patch from #4180 followed by a sage -b would enable us to easily see the pexpect logs. If you get the patch applied and so on do the following: export SAGE_PEXPECT_LOG=yes, then start sage from that console, do some examples that break. Then check out $DOT_SAGE/pexpect_logs/ (that is usually $HOME/.sage/pexpect_logs/) and send us the logs. That will likely allow us to pinpoint what is going wrong. If you do not want to or cannot do the patching just wait for 3.1.3 and it will have everything build in. Cheers, Michael --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Generating all subgroups of a group
Carlo and John, Thanks for the replies - those are both very helpful, and exactly the sort of thing I was hoping to learn about. It appears to me that H.normalizer() expects just a single element as an argument (rather than a whole subgroup), and returns a Group (rather than a PermutationGroup), but maybe I'm missing something. All the same, speeding things up with a use of the normalizer would be just the sort of thing my students could appreciate a few weeks from now. Thanks again, Rob On Sep 24, 12:33 pm, John Cremona [EMAIL PROTECTED] wrote: In Rob's example it would be nice (and good for the students to see) if instead of looping over all g in G to construct conjugate subgroups he could loop over coset representatives of H in G (where H is his representative_subgroup), or (optimal) coset reps of the normalizer of H in G. Now we can already compute HG=H.normalizer(G) in Sage directly, but I cannot see a way of getting a list of coset reps. Presumably Gap can do this, so perhaps wrapping that function would be worthwhile. I did a search_src(transversal) and indeed found (in the file coding/binary_code.pyx) reference to a Gap function RightTransversal. John Cremona 2008/9/24 Carlo Hamalainen [EMAIL PROTECTED]: On Wed, Sep 24, 2008 at 7:29 PM, Rob Beezer [EMAIL PROTECTED] wrote: A homework exercise for my students asks them to find all subgroups of S_4, which should be a very instructive exercise, even if a bit unreasonable. In SAGE, the conjugacy_classes_subgroups() method gets you started, and the quick-and-dirty brute-force code below creates all possible subgroups by doing the necessary conjugations. GAP has code for finding low index subgroups. Here's some Sage code to find all subgroups up to a certain index in the (3,3,3) triangle group: ## p = 3 q = 3 r = 3 F = gap.new(FreeGroup(3)) gens = list(gap.GeneratorsOfGroup(F)) rho1 = gens[0] rho2 = gens[1] rho3 = gens[2] triangle_group = F.FactorGroupFpGroupByRels([F.1*F.2*F.3, \ F.1**p, F.2**q, F.3**r]) iter = gap.LowIndexSubgroupsFpGroupIterator(triangle_group, \ gap.TrivialSubgroup(triangle_group), 30) while str(gap.IsDoneIterator(iter)) == 'false': H = gap.NextIterator(iter) nr_points = gap.Index(triangle_group, H) G = gap.Image(gap.ActionHomomorphism(triangle_group, \ gap.RightCosets(triangle_group, H), gap.OnRight)) print gap.Order(G) ## I have plans to write a Cython wrapper for LOWX some time, see http://designtheory.org/~peter/software/lowx/ -- Carlo Hamalainen http://carlo-hamalainen.net --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Links between worksheets
William, I'm able to convert my open-source linear algebra textbook from LaTeX to jsMath in an automated way, and you have seen my experiments in converting snippets of the jsMath versions into SAGE worksheets. When I attempt to convert the entire book this way, I'd expect each of the 40 or so sections to be its own worksheet. I use a lot of hyperlinks to definitions and theorems, so there would be a lot of links between worksheets. And the creation of these links is under the control of the translator (tex4ht). I haven't thought too hard about the details, but it seems greater flexibility in naming and locating work sheets would be necessary. So I thought I'd toss out this scenario as a similar situation where some extensions to the worksheet file name and location structure could make new uses of SAGE possible. Thanks, Rob On Sep 24, 9:32 am, William Stein [EMAIL PROTECTED] wrote: On Wed, Sep 24, 2008 at 12:09 AM, Maike [EMAIL PROTECTED] wrote: Hi all, I can have a link on one worksheet to another worksheet (e.g. http://localhost:8000/home/user/12/), but this includes the number that sage internally gives that worksheet (here: 12). Now if I upload these worksheets to another server, they are assigned different numbers and the links don't work properly anymore. Is there a any other way of linking in a more stable way, e.g. using the title of a worksheet? There is nothing better at present, unfortunately. Using the title isn't so good either, since it can be trivially changed at any time. Maybe worksheets should have some sort of linkable attribute url that is like a title, but can't easily be changed (and if you change it you get a big warning about links breaking)? Also, can I have a link that goes to a certain place within a worksheet? You can do this using standard html. If in edit mode you put a name=here somewhere, then you can link to that point using, e.g., a href=#here See https://sage.math.washington.edu:8101/home/pub/28/ for an example. Doing https://sage.math.washington.edu:8101/home/pub/28/#here jumps to the bottom of that worksheet. William --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: maple from sage on mac os
Hi Michael:
I followed your instructions, did the following Sage commands, and got
the following pexpect log.
--
| SAGE Version 3.1.2, Release Date: 2008-09-19 |
| Type notebook() for the GUI, and license() for information.|
--
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
inter
sage: maple('3*5')
sage0
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
inter
sage: maple('3*5')
sage1
sage: maple('3*5')
sage: maple('3*5')
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
inter
sage: maple('3*5')
sage2
===
#--read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/
4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
inter
#--read /Users/arai021/.sage//temp/prj_
\
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
#--567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_read /Users/arai021/.sage//
temp/prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
106.cs.auckland.ac.nz/4643//interface//tmp4643;
sage0
#--read /Users/arai021/.sage//temp/prj_567read /Users/
arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//interface//
tmp4643;
_106.cs.auckland.ac.nz/4643//inter
#--read /Users/arai021/.sage//temp/prj_\ read
/Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
#--567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
sage0
#--read /Users/arread /Users/arai021/.sage//temp/
prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
ai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//inter
#--read /Users/arai021/.sage//temp/prjread /Users/arai021/.sage//
temp/prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
_\
#--567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
sage1
#--read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/
4643//inter
#--read /Userread /Users/arai021/.sage//temp/
prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
s/arai021/.sage//temp/prj_\
#--567_106.cs.auckland.ac.nz/464read /Users/arai021/.sage//temp/
prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
3//interface//tmp4643;
sage1
#--read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/
46read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
43//inter
#--read /Users/arai021/.sage//temp/prj_
\
#--567_read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/
4643//interface//tmp4643;
read /Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
106.cs.auckland.ac.nz/4643//interface//tmp4643;
sage2
#--read /Users/arai021/.sage//temp/prj_567read /Users/
arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//interface//
tmp4643;
_106.cs.auckland.ac.nz/4643//inter
#--read /Users/arai021/.sage//temp/prj_\ read
/Users/arai021/.sage//temp/prj_567_106.cs.auckland.ac.nz/4643//
interface//tmp4643;
#--567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
sage2
#--read /Users/arread /Users/arai021/.sage//temp/
prj_567_106.cs.auckland.ac.nz/4643//interface//tmp4643;
On Sep 25, 12:44 pm, mabshoff [EMAIL PROTECTED]
dortmund.de wrote:
On Sep 24, 3:20 pm, Alex Raichev [EMAIL PROTECTED] wrote:
Hi William:
The same thing happens to me onMacOS X. How do i fix this?
Alex
Hi Alex,
I don't know how handy you are with patches and so on, but applying
the patch from #4180 followed by a sage-b would enable us to easily
see the pexpect logs. If you get the patch applied and so on do the
following:
export SAGE_PEXPECT_LOG=yes, then startsagefrom that console, do
some examples that break. Then check out $DOT_SAGE/pexpect_logs/ (that
is usually $HOME/.sage/pexpect_logs/) and send us the logs. That will
likely allow us to pinpoint what is going wrong.
If you do not want to or cannot do the patching just wait for 3.1.3
and it will have everything build in.
Cheers,
Michael
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
