Re: [sage-support] Re: Is this a bug?
Oops. I'll post a fix. On Fri, Sep 17, 2010 at 12:42 PM, kcrisman wrote: > > > On Sep 17, 2:30 pm, Alex Lara wrote: >> Hi everyone >> >> In Sage 4.5.2 and Sage 4.5.3, I get the following error using >> partial_fraction_decomposition() >> >> sage: R. = GF(3)[] >> sage: q = (x+1)/(x^3+x+1) > > If you try > > sage: q.part[tab] > > you'll see that this isn't a method for this object. > > You are also right that this *was* a method, even as recently as Sage > 4.4.4. > > Old: > sage: type(q) > > > New: > sage: type(q) > > > Sounds like a small API change to me, though probably unintentional. > > Looks like ticket #9051, which added this file, was due to Robert > Bradshaw. I'm sure he or someone else will have additional info for > you. I would log this as a new Trac ticket, but I'm not sure whether > this is related to http://trac.sagemath.org/sage_trac/ticket/8499 > > Thanks for the report! > > - kcrisman > > >> >> The same error I get using primes different from 2. But if I use 3^2 >> instead of 3, or a power of some prime, I get a right answer. >> >> I did not have the problem using Sage 4.4.1. >> >> Thanks in advance. >> >> Alex > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: "make" command not found
update. I followed the advice of (re)-installing xcode from my snow leopard cd. Sage is being built as I write... thanks. On Sep 17, 7:30 pm, John Thurber wrote: > Thanks for all the replies. I actually went to the local Apple store > earlier today and had Xcode installed there. However, the installation > of Xcode was after opening the tarball. > I thought maybe restarting was necessary, but it makes no difference. > The installation put xcode in a file called Developer on the hard > drive. > > Any other suggestions welcome. > > On Sep 17, 6:57 pm, Michael Welsh wrote: > > > > > Install XCode (Developer Tools) from your Computer software DVD. > > On 18/09/2010, at 1:34 PM, John T wrote: > > > > I'm new at all this. Does it mean I need to reinstall something? > > > --http://yomcat.geek.nz -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: "make" command not found
Have you tried make after installing XCode? If you go into Terminal and type "whereis make" it should tell you something like /usr/bin/make If it does nothing, you need to reinstall XCode. if it tells you something, you can compile sage fine. Michael On 18/09/2010, at 2:30 PM, John Thurber wrote: > The installation put xcode in a file called Developer on the hard > drive. -- http://yomcat.geek.nz -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: "make" command not found
Thanks for all the replies. I actually went to the local Apple store earlier today and had Xcode installed there. However, the installation of Xcode was after opening the tarball. I thought maybe restarting was necessary, but it makes no difference. The installation put xcode in a file called Developer on the hard drive. Any other suggestions welcome. On Sep 17, 6:57 pm, Michael Welsh wrote: > Install XCode (Developer Tools) from your Computer software DVD. > On 18/09/2010, at 1:34 PM, John T wrote: > > > I'm new at all this. Does it mean I need to reinstall something? > > --http://yomcat.geek.nz -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] "make" command not found
Install XCode (Developer Tools) from your Computer software DVD. On 18/09/2010, at 1:34 PM, John T wrote: > I'm new at all this. Does it mean I need to reinstall something? -- http://yomcat.geek.nz -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] "make" command not found
Do you have xcode or XDarwin installed? On Fri, Sep 17, 2010 at 9:34 PM, John T wrote: > Hi, > > Seems like something is missing from my OS? > trying to install from source on OSX 10.6.4. > I downloaded the tarball, moved it into a folder titled sagesource. > In a terminal window I changed into this directory, extracted the > tarball. This created a "sage-4.5.3" directory. > > I cd'd into this directory, typed make. > > This returned "make: command not found" > > I'm new at all this. Does it mean I need to reinstall something? > Seems like a mac problem, not a sage problem. > > -John > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] "make" command not found
Probably need to install xcode. On Fri, Sep 17, 2010 at 9:34 PM, John T wrote: > Hi, > > Seems like something is missing from my OS? > trying to install from source on OSX 10.6.4. > I downloaded the tarball, moved it into a folder titled sagesource. > In a terminal window I changed into this directory, extracted the > tarball. This created a "sage-4.5.3" directory. > > I cd'd into this directory, typed make. > > This returned "make: command not found" > > I'm new at all this. Does it mean I need to reinstall something? > Seems like a mac problem, not a sage problem. > > -John > > -- > To post to this group, send email to sage-support@googlegroups.com > To unsubscribe from this group, send email to > sage-support+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-support > URL: http://www.sagemath.org > -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] "make" command not found
Hi, Seems like something is missing from my OS? trying to install from source on OSX 10.6.4. I downloaded the tarball, moved it into a folder titled sagesource. In a terminal window I changed into this directory, extracted the tarball. This created a "sage-4.5.3" directory. I cd'd into this directory, typed make. This returned "make: command not found" I'm new at all this. Does it mean I need to reinstall something? Seems like a mac problem, not a sage problem. -John -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: summation
> Although to the casual observer, maxima's output might look like line > noise, the dedicated reader will find that maxima's notation is > actually quite close to the standard mathematical notation. You can Exactly what I was trying to say. The standard notation is just extremely complicated - a surfeit of indices, as a grad school prof once said. Nils was even more patient than I was in detailing it, thanks :) - kcrisman -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] GAP on OSX (sage 4.4.1)
2010/5/12 Jérôme Tremblay :
> I am unable to run GAP from a network account on my mac.
>
> sage: gap('(1,2,3)')
>
> raise an exception.
>
> sage: gap_console()
>
> gives a little more information:
>
> Couldn't open saved workspace /Network/Servers/hostname.ca/Users/
> tremblayj/.sage//gap/workspace-4762775528093915922
>
> When I use a local account, everything works fine.
>
> Can anyone help me?
>
>
>
>
> Full session:
>
> sage: gap('(1,2,3)')
> ---
> TypeError Traceback (most recent call
> last)
>
> /Network/Servers/thales.math.uqam.ca/Users/tremblayj/
> in ()
>
> /Library/sage/local/lib/python2.6/site-packages/sage/interfaces/
> expect.py in __call__(self, x, name)
> 1030
> 1031 if isinstance(x, basestring):
> -> 1032 return cls(self, x, name=name)
> 1033 try:
> 1034 return self._coerce_from_special_method(x)
>
> /Library/sage/local/lib/python2.6/site-packages/sage/interfaces/
> expect.py in __init__(self, parent, value, is_name, name)
> 1449 except (TypeError, KeyboardInterrupt,
> RuntimeError, ValueError), x:
> 1450 self._session_number = -1
> -> 1451 raise TypeError, x
> 1452 self._session_number = parent._session_number
> 1453
>
> TypeError: Unable to start gap
> sage: gap_console()
> Couldn't open saved workspace /Network/Servers/thales.math.uqam.ca/
> Users/tremblayj/.sage//gap/workspace-4762775528093915922
> sage: version()
> 'Sage Version 4.4.1, Release Date: 2010-05-02'
> sage:
I created a ticket with a patch:
http://trac.sagemath.org/sage_trac/ticket/9938
Basically, GAP does not start if the path to the GAP workspace file
contains more than 82 characters.
Franco
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[sage-support] Re: summation
On Sep 17, 1:23 pm, sps wrote: > I'm a mathematician, not a traslator of uncomprensible characters!! Many non-mathematicians would argue that the latter implies the former :-) Computer algebra packages such a maxima have to work a little to squeeze mathematical notation on a single line and they require the user to meet them somewhere halfway. If you read the documentation of Maxima [http://maxima.sourceforge.net/docs/manual/en/maxima_16.html], you can find that the notation %f[p,q]([a1,...,ap],[b1,...,bq],z) stands for the generalized hypergeometric function (see http://en.wikipedia.org/wiki/Generalized_hypergeometric_series) p_F_q ( a1,...,ap ; b1,...,bq; z ) and that %i stands for the complex number i=sqrt(-1) [because I'm typing this into a plain text message board, I have to make notational compromises as well] Although to the casual observer, maxima's output might look like line noise, the dedicated reader will find that maxima's notation is actually quite close to the standard mathematical notation. You can argue that the "%" convention for "standard symbols" is possibly ill- conceived, but having "f" (or even "F") and "i" reserved for the hypergeometric function and sqrt(-1) respectively would have been inconvenient, since those symbols are popular with mathematicians for other uses as well. I haven't checked if maxima's answer is correct. The fact that one should worry about that usually causes much more serious concern than the form in which computer algebra packages give their answers. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: summation
Hi, I think that there is no simple method how to write the result in simple terms. Similarly as we read sin(x) "sine of x" we can read %f[4,3]([1,1,-(sqrt(3)*%i+1)/2,(sqrt(3)*%i-1)/2], [2,-(sqrt(3)*%i-1)/2,(sqrt(3)*%i+1)/2],%i/2) as Generalized Hypergeometric function . for %f see http://maxima.sourceforge.net/docs/manual/en/maxima_16.html#SEC56 or you can ask Maxima group. %i is square root of -1 Hope this helps Robert On 17 zář, 22:23, sps wrote: > Perhaps you don't have me very well understood! > > When I said: > 'Can you explicitly write the results?' > I want to know how I can read this espression: > > (%o4) %f[4,3]([1,1,-(sqrt(3)*%i+1)/2,(sqrt(3)*%i-1)/2], > [2,-(sqrt(3)*%i-1)/2,(sqrt(3)*%i+1)/2],%i/2) > > For example: > integral(3x^3,x) > x^3 > > and I can understand what is its mathematical expression: x*x*x > > But what's the meaning of an expression like: > %0aLog(%3+-/) > it's out of knowledge of a matematician. > > I'm a mathematician, not a traslator of uncomprensible characters!! -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: integral
If I try this, here is what I get:
sage: var('a')
a
sage: integral(cos(2*x)/(x^2+a^2),x,-Infinity,+Infinity)
ERROR: An unexpected error occurred while tokenizing input
...
TypeError: Computation failed since Maxima requested additional
constraints (try the command 'assume(a>0)' before integral or limit
evaluation, for example):
Is a positive, negative, or zero?
Ok, let's do this
sage: assume(a>0)
sage: integral(cos(2*x)/(x^2+a^2),x,-Infinity,+Infinity)
pi*e^(-2*a)/a
Is it what you expect?
On Sep 17, 10:25 pm, sps wrote:
> I want to calculate
>
> integral(cos(2x)/(x^2+a^2),x,-Infinity,+Infinity)
>
> but Sage return me an error message.
>
> What I have to digit
>
> Thank you
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[sage-support] Re: GUI Error.
What is your default browser? If it isn't Firefox, can you try using http://localhost:8000 there? -M. Hampton On Sep 17, 2:13 pm, alien308 wrote: > I make sage from sources, version 4.5.3. Run a command "./sage" from > sage root directory (sage-4.5.3). Type notebook() > Browser output: > > Unable to load page > Problem occurred while loading the > URLhttp://localhost:8000/?startup_token=b3f0af391295d422bb45534552486b58 > Cannot connect to destination > > System: Debian Squeeze, desktop: Gnome. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] integral
I want to calculate integral(cos(2x)/(x^2+a^2),x,-Infinity,+Infinity) but Sage return me an error message. What I have to digit Thank you -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: summation
Perhaps you don't have me very well understood! When I said: 'Can you explicitly write the results?' I want to know how I can read this espression: (%o4) %f[4,3]([1,1,-(sqrt(3)*%i+1)/2,(sqrt(3)*%i-1)/2], [2,-(sqrt(3)*%i-1)/2,(sqrt(3)*%i+1)/2],%i/2) For example: integral(3x^3,x) x^3 and I can understand what is its mathematical expression: x*x*x But what's the meaning of an expression like: %0aLog(%3+-/) it's out of knowledge of a matematician. I'm a mathematician, not a traslator of uncomprensible characters!! -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: summation
On Sep 17, 3:17 pm, sps wrote:
> Can you explicitly write the results?
This might help you:
(%i2) display2d:false;
(%o2) false
(%i3) load(simplify_sum);
(%o3) "/Users/.../sage-4.4.4/local/share/maxima/5.20.1/share/contrib/
solve_rec/simplify_sum.mac"
(%i4) simplify_sum(sum(((2*%i)^n/(n^3+1)*(1/4)^n),n,0,inf))
;
(%o4) %f[4,3]([1,1,-(sqrt(3)*%i+1)/2,(sqrt(3)*%i-1)/2],
[2,-(sqrt(3)*%i-1)/2,(sqrt(3)*%i+1)/2],%i/2)
So this is the hypergeometric function F_{4,3} (where usually the 4 is
on the left and the three on the right) evaluated at the values 1, 1,
and so one, where %i is just one of the square roots of negative one.
You'll note that there are two sets of things to evaluate it at, plus
the third (i/2). These are not necessarily easy to compute.
See http://mathworld.wolfram.com/GeneralizedHypergeometricFunction.html,
for instance. I don't know that I can make this any easier to
compute, though! But unfortunately I cannot make the hypergeometric
functions easy (though they are very useful).
I'm not quite sure if this is the answer you are looking for or not,
so let us know.
- kcrisman
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[sage-support] Re: Is this a bug?
On Sep 17, 2:30 pm, Alex Lara wrote: > Hi everyone > > In Sage 4.5.2 and Sage 4.5.3, I get the following error using > partial_fraction_decomposition() > > sage: R. = GF(3)[] > sage: q = (x+1)/(x^3+x+1) If you try sage: q.part[tab] you'll see that this isn't a method for this object. You are also right that this *was* a method, even as recently as Sage 4.4.4. Old: sage: type(q) New: sage: type(q) Sounds like a small API change to me, though probably unintentional. Looks like ticket #9051, which added this file, was due to Robert Bradshaw. I'm sure he or someone else will have additional info for you. I would log this as a new Trac ticket, but I'm not sure whether this is related to http://trac.sagemath.org/sage_trac/ticket/8499 Thanks for the report! - kcrisman > > The same error I get using primes different from 2. But if I use 3^2 > instead of 3, or a power of some prime, I get a right answer. > > I did not have the problem using Sage 4.4.1. > > Thanks in advance. > > Alex -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] GUI Error.
I make sage from sources, version 4.5.3. Run a command "./sage" from sage root directory (sage-4.5.3). Type notebook() Browser output: Unable to load page Problem occurred while loading the URL http://localhost:8000/?startup_token=b3f0af391295d422bb45534552486b58 Cannot connect to destination System: Debian Squeeze, desktop: Gnome. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: summation
Can you explicitly write the results? Thank you very much -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Is this a bug?
Hi everyone In Sage 4.5.2 and Sage 4.5.3, I get the following error using partial_fraction_decomposition() sage: R. = GF(3)[] sage: q = (x+1)/(x^3+x+1) sage: q.partial_fraction_decomposition() --- AttributeErrorTraceback (most recent call last) /home/lrodri/ in () /home/lrodri/sage-4.5.2/local/lib/python2.6/site-packages/sage/ structure/element.so in sage.structure.element.Element.__getattr__ (sage/structure/element.c:2632)() /home/lrodri/sage-4.5.2/local/lib/python2.6/site-packages/sage/ structure/parent.so in sage.structure.parent.getattr_from_other_class (sage/structure/parent.c:2835)() /home/lrodri/sage-4.5.2/local/lib/python2.6/site-packages/sage/ structure/parent.so in sage.structure.parent.raise_attribute_error (sage/structure/parent.c:2602)() AttributeError: 'sage.rings.fraction_field_FpT.FpTElement' object has no attribute 'partial_fraction_decomposition' The same error I get using primes different from 2. But if I use 3^2 instead of 3, or a power of some prime, I get a right answer. I did not have the problem using Sage 4.4.1. Thanks in advance. Alex -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: integer factorization benchmarks
On Sep 16, 10:10 pm, Greg Marks wrote: > Out of curiosity... > > At http://sagemath.org/tour-benchmarks.html the CPU time > given for factorization of the integer 2^512 - 1 with SAGE > version 4.1.1 is 92.29 sec. Hi, I'm the one who created that page. I did them on my machine back then when I created it. It's just some overview of selected routines for some operations. The only thing I can assure you is that they are run on the same machine with the given version numbers and I haven't cheated when copy/pasting the numbers ;) Is there interest in more benchmarks? My idea would be to write a script that collects data (if available, runs the corresponding commands in mathematica, maple and friends, too) and generates a report with data about the machine and OS. On the website I could generate an aggregated view of all submitted entries. Of course, somebody has to code all that ... H -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Using PyWavelets in Sage
I just made an spkg for this that seems to work, so you could also do:
sage -i http://sage.math.washington.edu/home/mhampton/PyWavelets-0.2.0.p0.spkg
Putting this in the experimental repository is now trac ticket 9932:
http://trac.sagemath.org/sage_trac/ticket/9932
-Marshall Hampton
On Sep 16, 11:51 pm, Minh Nguyen wrote:
> Hi,
>
>
>
> On Fri, Sep 17, 2010 at 12:07 PM, j wade wrote:
> > I would like to use PyWavelets (http://www.pybytes.com/pywavelets/) in
> > Sage.
>
> > I am running Sage 4.3.4 on Ubuntu 9.10.
>
> > I have installed python-pywt using Synaptic File Manager, but I am not
> > sure what to do beyond this. I have refreshed the libraries, and
> > tried
>
> > import scipy
> > from scipy import pywt
>
> > and
>
> > import scipy
> > import pywt
>
> > but neither command recognizes pywt.
>
> The above steps failed because by default Sage doesn't recognize
> Python packages that you have installed system-wide. That is, the
> package manager Synaptic installs packages system-wide, whereas the
> packages (including Python ones) in Sage are installed specifically
> under the SAGE_ROOT top-level directory. So when you issued
>
> import pywt
>
> from within a Sage session, Sage couldn't find pywt because PyWavelets
> was not installed under a place where Sage would by default recognize.
>
> > If someone out there is using pywavelets with Sage, I'd appreciate it
> > if you could let me know how you were able to get it to work.
>
> Here are the steps that should allow you to install and use PyWavelets
> from within Sage.
>
> (1) Download a source release of PyWavelets
> fromhttp://pypi.python.org/pypi/PyWavelets/. I downloaded
> PyWavelets-0.2.0.tar.bz2 and uncompressed it.
>
> (2) Get the absolute path to your local Sage installation. In my case, it's
>
> /dev/shm/mvngu/sage-4.5.3
>
> (3) Navigate to the top-level directory of the uncompressed PyWavelets
> package and install it:
>
> $ cd /path/to/PyWavelets-0.2.0/
> $ /dev/shm/mvngu/sage-4.5.3/sage -python setup.py install
>
>
> (4) Load Sage and start using PyWavelets:
>
> $ /dev/shm/mvngu/sage-4.5.3/sage
> --
> | Sage Version 4.5.3, Release Date: 2010-09-04 |
> | Type notebook() for the GUI, and license() for information. |
> --
> sage: import pywt
> sage: pywt.families()
> ['haar', 'db', 'sym', 'coif', 'bior', 'rbio', 'dmey']
> sage: w = pywt.Wavelet('db3')
> sage: print w
> Wavelet db3
> Family name: Daubechies
> Short name: db
> Filters length: 6
> Orthogonal: True
> Biorthogonal: True
> Symmetry: asymmetric
>
> --
> Regards
> Minh Van Nguyen
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[sage-support] Re: Mersenne prime test
OK, thanks a lot, I did it that way and now it works. On 17 Sep., 10:51, Dan Drake wrote: > On Fri, 17 Sep 2010 at 01:25AM -0700, Michael wrote: > > The Algorithm works as follows: > > > Initialize the value for p > > G←−2 > > for i from 1 to p − 1 do > > G ← (G^2 + 12)^2/(4 · G · (G^2 − 12)) (mod Mp) > > If G does not exist, then stop the Algorithm, Mp is not prime > > end do > > If G = 0 then Mp is prime > > else Mp is not prime > > > How can I interrupt the loop? I tried a try...except statement, but it > > seems that the ringarithmetic of Sage doesn't produce an error if an > > element to be divided by is not invertible. > > You can break out of loops in Python/Sage with "break": > > for i in range(100): > # do stuff > if i == 50: > break > # do more stuff > > In the above loop, when i hits 50, it will "do stuff", and then jump out > of the loop and continue. > > Dan > > -- > --- Dan Drake > - http://mathsci.kaist.ac.kr/~drake > --- > > signature.asc > < 1 KBAnzeigenHerunterladen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Mersenne prime test
On Fri, 17 Sep 2010 at 01:25AM -0700, Michael wrote: > The Algorithm works as follows: > > Initialize the value for p > G←−2 > for i from 1 to p − 1 do > G ← (G^2 + 12)^2/(4 · G · (G^2 − 12)) (mod Mp) > If G does not exist, then stop the Algorithm, Mp is not prime > end do > If G = 0 then Mp is prime > else Mp is not prime > > How can I interrupt the loop? I tried a try...except statement, but it > seems that the ringarithmetic of Sage doesn't produce an error if an > element to be divided by is not invertible. You can break out of loops in Python/Sage with "break": for i in range(100): # do stuff if i == 50: break # do more stuff In the above loop, when i hits 50, it will "do stuff", and then jump out of the loop and continue. Dan -- --- Dan Drake - http://mathsci.kaist.ac.kr/~drake --- signature.asc Description: Digital signature
[sage-support] Mersenne prime test
Hello! I am trying to write an alternative test method for the primality of Mersenne numbers based on the paper "An Elliptic Curve test for Mersenne primes" by B.H. Gross. I tried to implement the resulting algorithm in Sage, it did work, BUT there is still one problem: the Algorithm should not need the full amount of iterations if the tested Mersenne number Mp is not prime. The Algorithm works as follows: Initialize the value for p G←−2 for i from 1 to p − 1 do G ← (G^2 + 12)^2/(4 · G · (G^2 − 12)) (mod Mp) If G does not exist, then stop the Algorithm, Mp is not prime end do If G = 0 then Mp is prime else Mp is not prime How can I interrupt the loop? I tried a try...except statement, but it seems that the ringarithmetic of Sage doesn't produce an error if an element to be divided by is not invertible. I will also post my code for the routine (there I have to admit that I'm totally new to Sage and so I'm quite sure the way I tried to implement that is not very elegant or efficient). Thanks a lot for your support! P.S.: I don't know exactly how the is_prime() statement works, maybe that test could make it a little faster since it needs less operations than the Lucas-Lehmer-Test. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: installation problem
On Fri, 17 Sep 2010 at 08:40AM +0100, robin hankin wrote: > thanks for this. I suppose "dependency" isn't quite the right word here. > > The error message below is cut-and-pasted from the output of 'make'; > at one point it asks me to email sage-devel, but perhaps this list > is better for now! Ah, I see. I think "readline hell" is a better description than "dependency hell". :) I hope we can get this sorted out. Dan -- --- Dan Drake - http://mathsci.kaist.ac.kr/~drake --- signature.asc Description: Digital signature
Re: [sage-support] Re: installation problem
Hello Dan thanks for this. I suppose "dependency" isn't quite the right word here. The error message below is cut-and-pasted from the output of 'make'; at one point it asks me to email sage-devel, but perhaps this list is better for now! best wishes Robin Host system uname -a: Linux le112 2.6.34-12-desktop #1 SMP PREEMPT 2010-06-29 02:39:08 +0200 i686 i686 i386 GNU/Linux CC Version gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/i586-suse-linux/4.5/lto-wrapper Target: i586-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib --libexecdir=/usr/lib --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.5 --enable-ssp --disable-libssp --disable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --program-suffix=-4.5 --enable-linux-futex --without-system-libunwind --enable-gold --with-plugin-ld=/usr/bin/gold --with-arch-32=i586 --with-tune=generic --build=i586-suse-linux Thread model: posix gcc version 4.5.0 20100604 [gcc-4_5-branch revision 160292] (SUSE Linux) bash: symbol lookup error: bash: undefined symbol: rl_filename_rewrite_hook real0m0.002s user0m0.000s sys 0m0.001s sage: An error occurred while installing sqlite-3.6.22 Please email sage-devel http://groups.google.com/group/sage-devel explaining the problem and send the relevant part of of /home/rksh/Download/sage-4.5.3/install.log. Describe your computer, operating system, etc. If you want to try to fix the problem yourself, *don't* just cd to /home/rksh/Download/sage-4.5.3/spkg/build/sqlite-3.6.22 and type 'make check' or whatever is appropriate. Instead, the following commands setup all environment variables correctly and load a subshell for you to debug the error: (cd '/home/rksh/Download/sage-4.5.3/spkg/build/sqlite-3.6.22' && '/home/rksh/Download/sage-4.5.3/sage' -sh) When you are done debugging, you can type "exit" to leave the subshell. make[1]: *** [installed/sqlite-3.6.22] Error 1 make[1]: Leaving directory `/home/rksh/Download/sage-4.5.3/spkg' real0m29.324s user0m20.838s sys 0m3.264s Error building Sage. ./sage -docbuild all html 2>&1 | tee -a dochtml.log python: can't open file '/home/rksh/Download/sage-4.5.3/devel/sage/doc/common/builder.py': [Errno 2] No such file or directory le112:~/Download/sage-4.5.3% On Fri, Sep 17, 2010 at 12:08 AM, Dan Drake wrote: > On Thu, 16 Sep 2010 at 07:43PM +0100, robin hankin wrote: >> I did try to compile my own, but ran in to utter dependency hell. > > The Sage source should include very nearly everything it needs to build. > There are very few dependencies. What kind of "dependency hell" did you > run into? > > Dan > > -- > --- Dan Drake > - http://mathsci.kaist.ac.kr/~drake > --- > > -BEGIN PGP SIGNATURE- > Version: GnuPG v1.4.10 (GNU/Linux) > > iEYEARECAAYFAkySo3YACgkQr4V8SljC5LrLOACfQSxMAi2aSFl5LJRSwvewt3/l > S+AAnimn5caqEvhfly43g6Urm9qOVjfj > =DZ3D > -END PGP SIGNATURE- > > -- Robin Hankin Uncertainty Analyst hankin.ro...@gmail.com -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
