[sage-support] Re: Adding text/formatting to worksheets in the notebook

2008-10-07 Thread Stan Schymanski
So that's what Knoboo is about? I'm excited!! Serge, did you know that you can also format whole cells as html by putting %html at the top of them? You then just write html code in the rest of the cell and it will be formatted. Use $...$ to have typeset equations in your html cells. Example: %hi

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread William Stein
On Tue, Oct 7, 2008 at 1:27 PM, Mike Hansen <[EMAIL PROTECTED]> wrote: > > Hello, > > On Tue, Oct 7, 2008 at 1:15 PM, Jason Grout <[EMAIL PROTECTED]> wrote: >> To sum up the discussion about what makes things slow, is it a >> file-locking bottleneck with the sage server? > > I don't think anyone h

[sage-support] Re: integer linear programming in Sage?

2008-10-07 Thread Marshall Hampton
Martin - is that already accessible in sage or would some sort of wrapper have to be written? > > Is this what you are looking for: > > http://www.singular.uni-kl.de/Manual/3-0-4/sing_610.htm > > ? > > Cheers, > Martin > > -- > name: Martin Albrecht > _pgp:http://pgp.mit.edu:11371/pks/lookup?op

[sage-support] Re: Matrix inverse with symbols as elements

2008-10-07 Thread Marshall Hampton
A slight variation on John's answer: you could also do: sage: R.=QQ[] sage: X = matrix( [ [x, y, z], [y, z, x], [z, x, y] ]) sage: Y = X*X^-1 sage: Y = matrix(R,Y) sage: Y [1 0 0] [0 1 0] [0 0 1] M. Hampton On Oct 7, 8:16 pm, SK <[EMAIL PROTECTED]> wrote: > Thank you Mike and John. It seeme

[sage-support] Re: Matrix inverse with symbols as elements

2008-10-07 Thread SK
Thank you Mike and John. It seemed unlikely to me that there was a bug anyway, but I had to ask. I used the 'simplify_rational' and it worked perfectly. Also, I noticed that Mike used 'apply_map'. That and lambda make it look rather close to Lisp; it looks like the more I look at sagemath, the bet

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Justin C. Walker
On Oct 7, 2008, at 13:27 , Mike Hansen wrote: > > Hello, > > On Tue, Oct 7, 2008 at 1:15 PM, Jason Grout <[EMAIL PROTECTED] > > wrote: >> To sum up the discussion about what makes things slow, is it a >> file-locking bottleneck with the sage server? > > I don't think anyone has done any serious

[sage-support] Re: integer linear programming in Sage?

2008-10-07 Thread Stephen Hartke
I have created a spkg to install lp_solve into Sage; it can be obtained at: http://www.math.unl.edu/~shartke2/files/lp_solve-5.5.0.13.spkg I have posted to sage-devel suggesting this spkg for inclusion into Sage. lp_solve includes a linear programming solver (simplex based) and an integer programm

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread mabshoff
On Oct 7, 1:27 pm, "Mike Hansen" <[EMAIL PROTECTED]> wrote: > Hello, > > On Tue, Oct 7, 2008 at 1:15 PM, Jason Grout <[EMAIL PROTECTED]> wrote: > > To sum up the discussion about what makes things slow, is it a > > file-locking bottleneck with the sage server? > > I don't think anyone has done a

[sage-support] Re: integer linear programming in Sage?

2008-10-07 Thread Martin Albrecht
On Tuesday 07 October 2008, Paul Zimmermann wrote: >Hi, > > a question of a colleague from my lab: > > can Sage solve linear systems A*x=b, where A is a matrix with positive > integer coefficients, b is a vector with positive integer coefficients, > and the unknown vector x is searched ove

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Mike Hansen
Hello, On Tue, Oct 7, 2008 at 1:15 PM, Jason Grout <[EMAIL PROTECTED]> wrote: > To sum up the discussion about what makes things slow, is it a > file-locking bottleneck with the sage server? I don't think anyone has done any serious profiling of the notebook so I think that conclusion is quite a

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Jason Grout
William Stein wrote: > On Mon, Oct 6, 2008 at 10:11 AM, kcrisman <[EMAIL PROTECTED]> wrote: >> >> >> >>> To emphasize again, I doubt it scales to more than 30 users all hammering >>> the server at once. >>> >> I can confirm this from our experience as well; on a more moderate >> size server even 1

[sage-support] Re: Typesetting problem - Sage VMware appliance on WindowsXP

2008-10-07 Thread Jason Grout
Hazem wrote: > Actually, I just noticed that jsMath gave me an error (jsMath failed > to set up properly, error code -7). > Could this be related? is this common? why does it happen and how do I > fix it? > This might be a fonts issue. When you click on the "jsMath" button in the bottom right

[sage-support] Re: Adding text/formatting to worksheets in the notebook

2008-10-07 Thread Jason Grout
Serge Salamanka wrote: > Just found an example > html("Double Precision Root Finding Using Bisection") > here: > http://wiki.sagemath.org/interact/calculus > Sorry to trouble about it. > > There is also another question: > can I group the cells like in Mathematica ? Hide them, expand them ? > Y

[sage-support] Re: integer linear programming in Sage?

2008-10-07 Thread Harald Schilly
On Oct 7, 8:38 pm, Paul Zimmermann <[EMAIL PROTECTED]> wrote: > a question of a colleague from my lab: > ... integer linear programming (ILP) I'm not sure either, but he could try his luck with openopt: http://scipy.org/scipy/scikits/wiki/MILP interfacing with lpsolve or glpk. h --~--~---

[sage-support] Re: Sage compile fails on Fedora Core 2

2008-10-07 Thread Venkat
Thanks for the response. I'll try to use Sage on a more recent system. Thanks, Venkat. On Oct 7, 1:21 pm, mabshoff <[EMAIL PROTECTED] dortmund.de> wrote: > On Oct 7, 10:01 am, Venkat <[EMAIL PROTECTED]> wrote: > > > Hi all, > > Hi, > > > I'm using a Fedora Core2 based system, which I can't upgra

[sage-support] Re: integer linear programming in Sage?

2008-10-07 Thread Marshall Hampton
I believe that the answer is currently: no, Sage cannot do integer linear programming. But I could be wrong, if that capability is hiding in something added since the last time this question came up. I am not sure what open source code is out there to do that - ? M. Hampton On Oct 7, 12:38 pm,

[sage-support] Re: Typesetting problem - Sage VMware appliance on WindowsXP

2008-10-07 Thread Hazem
Actually, I just noticed that jsMath gave me an error (jsMath failed to set up properly, error code -7). Could this be related? is this common? why does it happen and how do I fix it? thanks, Hazem On Oct 7, 2:57 pm, Hazem <[EMAIL PROTECTED]> wrote: > Dear Sage developers, > > In the Firefox in

[sage-support] Typesetting problem - Sage VMware appliance on WindowsXP

2008-10-07 Thread Hazem
Dear Sage developers, In the Firefox interface to SAGE, the command show(integrate(x)) results in 2 x 2 rather than 2 x 2 in fact , a number of quotients and fractions are displayed incorrectly. I am using SAGE 3.1.2 VMWare appliance on Windows XP. Regards, Hazem --~--~--

[sage-support] integer linear programming in Sage?

2008-10-07 Thread Paul Zimmermann
Hi, a question of a colleague from my lab: can Sage solve linear systems A*x=b, where A is a matrix with positive integer coefficients, b is a vector with positive integer coefficients, and the unknown vector x is searched over the positive integers? I guess this is more or less equivale

[sage-support] Re: divmod question

2008-10-07 Thread Robert Bradshaw
On Oct 7, 2008, at 10:59 AM, Bob Wonderly wrote: > You support people fixed my long arithmetic problem. The patch applied > and worked! Great. > Now here is another puzzlement: > > alist = > [divmod(0,6),divmod(1,6),divmod(2,6),divmod(3,6),divmod(4,6),divmod > (5,6)] > #of course that's one li

[sage-support] Re: Unexpected changes in worksheet name.

2008-10-07 Thread Sand Wraith
So am i wrong? or it is a bug --~--~-~--~~~---~--~~ 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-

[sage-support] Re: Adding text/formatting to worksheets in the notebook

2008-10-07 Thread Serge Salamanka
Just found an example html("Double Precision Root Finding Using Bisection") here: http://wiki.sagemath.org/interact/calculus Sorry to trouble about it. There is also another question: can I group the cells like in Mathematica ? Hide them, expand them ? thanks Serge Serge Salamanka пишет: > Wil

[sage-support] divmod question

2008-10-07 Thread Bob Wonderly
You support people fixed my long arithmetic problem. The patch applied and worked! Now here is another puzzlement: alist = [divmod(0,6),divmod(1,6),divmod(2,6),divmod(3,6),divmod(4,6),divmod(5,6)] #of course that's one line print alist for k in range(6): x = divmod(k,6) print x [(0,

[sage-support] Re: Sage compile fails on Fedora Core 2

2008-10-07 Thread mabshoff
On Oct 7, 10:01 am, Venkat <[EMAIL PROTECTED]> wrote: > Hi all, Hi, > I'm using a Fedora Core2 based system, which I can't upgrade. > > Compilation fails for the latest Sage (3.1.2). I'm not sure how to fix > this error. Any help is appreciated. I'm pasting the relevant lines > below. It look

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Robert Bradshaw
On Oct 7, 2008, at 3:58 AM, Thierry Dumont wrote: > William Stein a écrit : > >> >> If your hardware is pretty good (which the OP's hardware is), the >> problem is definitely the webserver and notebook interface. >> Running many sage sessions at once gets around this. >> > > ok, if I understand co

[sage-support] Re: Adding text/formatting to worksheets in the notebook

2008-10-07 Thread Serge Salamanka
William Stein wrote: > On Mon, Sep 22, 2008 at 11:05 AM, D. Monarres <[EMAIL PROTECTED]> wrote: >> I want to produce a worksheet tutorial for SAGE usage on our campus >> and was wondering how I could add static text around the notebook >> cells like is done in the live tutorial . Do I just edit as

[sage-support] Sage compile fails on Fedora Core 2

2008-10-07 Thread Venkat
Hi all, I'm using a Fedora Core2 based system, which I can't upgrade. Compilation fails for the latest Sage (3.1.2). I'm not sure how to fix this error. Any help is appreciated. I'm pasting the relevant lines below. Thanks, Venkat. Making all in cxx make[4]: Entering directory `/data/venkat/sa

[sage-support] Re: latex of acos

2008-10-07 Thread Håkan Granath
On Oct 1, 4:21 pm, pragma <[EMAIL PROTECTED]> wrote: > ive tried this but it doesnt seem to do the job: > > class c_arccos(sage.calculus.calculus.Function_arccos): >     def __init__(self): >         pass >     def _latex_(self): >         return "\\arccos" > > p_arccos = c_arccos() > > print late

[sage-support] Re: is it possible to show() a variable with "it's name = " in front of it

2008-10-07 Thread William Stein
On Tue, Oct 7, 2008 at 2:50 AM, Stan Schymanski <[EMAIL PROTECTED]> wrote: > > This does not format things like a_2 very well. What about this one? > > def ashow(v): >show(sage.calculus.calculus.var(v)==eval(v)) > > Show seems to format the equations nicely without explicitly using > latex. >

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread William Stein
On Tue, Oct 7, 2008 at 7:10 AM, Jason Grout <[EMAIL PROTECTED]> wrote: > > Alex Clemesha wrote: > >> We have spend a majority of our effort on Knoboo trying to make >> it a robust and scalable web application (like, for example, the >> 'frontend' is totally decoupled from the backend 'kernel'). >>

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Jason Grout
Alex Clemesha wrote: > We have spend a majority of our effort on Knoboo trying to make > it a robust and scalable web application (like, for example, the > 'frontend' is totally decoupled from the backend 'kernel'). > > What's missing from Knoboo, and what is so great about the Sage Notebook, >

[sage-support] Re: ntl dylib

2008-10-07 Thread Guilhem Bourrié
Thank you very much. I moved to 10.5 and it worked very well. Now, I follow the tutorial! Best regards, Le 6 oct. 08, à 18:33, William Stein a écrit : > > On Mon, Oct 6, 2008 at 7:15 AM, Guilhem_Bourrie <[EMAIL PROTECTED]> > wrote: >> >> hello, >> I am a new member of this group, >> >> I downloa

[sage-support] Re: Using Sage with a large number of undergraduate students.

2008-10-07 Thread Thierry Dumont
William Stein a écrit : > > If your hardware is pretty good (which the OP's hardware is), the > problem is definitely the webserver and notebook interface. > Running many sage sessions at once gets around this. > ok, if I understand correctly, running "many" servers (listening on different port

[sage-support] Re: is it possible to show() a variable with "it's name = " in front of it

2008-10-07 Thread Stan Schymanski
This does not format things like a_2 very well. What about this one? def ashow(v): show(sage.calculus.calculus.var(v)==eval(v)) Show seems to format the equations nicely without explicitly using latex. If latex is desired explicitly, the following works, too: def ashow(v): show(latex(sa

[sage-support] Re: Matrix inverse with symbols as elements

2008-10-07 Thread John Cremona
On Oct 7, 8:45 am, "Mike Hansen" <[EMAIL PROTECTED]> wrote: > Hello, > > On Mon, Oct 6, 2008 at 6:50 PM, SK <[EMAIL PROTECTED]> wrote: > > Now, I try and compute X * (X^(-1)). Instead of getting an identity > > matrix, I get a complicated matrix in x, y and z. Thinking that the > > "^" may be th

[sage-support] Re: Matrix inverse with symbols as elements

2008-10-07 Thread Mike Hansen
Hello, On Mon, Oct 6, 2008 at 6:50 PM, SK <[EMAIL PROTECTED]> wrote: > Now, I try and compute X * (X^(-1)). Instead of getting an identity > matrix, I get a complicated matrix in x, y and z. Thinking that the > "^" may be the issue, I tried X * (X.inverse()), but got the same > issue. > > Am I do

[sage-support] Matrix inverse with symbols as elements

2008-10-07 Thread SK
Hi, I am a newbie with Sage, and have been thrilled at the open source symbolic computation capability. I was wondering if I misunderstood something, or if this is a bug. I am using "SAGE Version 3.1.2, Release Date: 2008-09-19 " First, I define a matrix X. X = matrix( [ [x, y, z], [y, z, x], [