The author of this
http://www.davidson.edu/math/chartier/Starwars/
project wanted code to render a 3d model of yoda for a demonstration
of rotation matrices.
A worksheet that does this can be found at
http://sage.math.washington.edu/home/jkantor/yoda.sws
(it is large 3.5 M, it has a large at
Thanks. Do you guys think it might be wise to temporarily change the
banner to mention this. I had never heard of inotebook.
On Apr 28, 4:01 am, Dan Drake <[EMAIL PROTECTED]> wrote:
> On Mon, 28 Apr 2008 at 12:07AM -0700, Joshua Kantor wrote:
> > So I upgraded a linux machine to
So I upgraded a linux machine to ubuntu 8.04. I knew that there would
an issue with self signed certs. I found that I wasn't even able to
add an exception.
I went preferences->advanced/encryption->view certificates
Then switched to the servers tab and clicked on add exception.
I tried to get cert
nstall xppaut). The docs say it
>
> > > "is a tool for solving
>
> > > * differential equations,
> > > * difference equations,
> > > * delay equations,
> > > * functional equations,
> > > * boundary value problems, and
&
I was preparing a talk on solving ODE's in sage, and the culminating
example is pretty neat so I thought I would post it.
The following code will plot a little bit of the lorenz attractor
sage: def lorenz(t,y,params):
... return [params[0]*(y[1]-y[0]),y[0]*(params[1]-y[2])-
y[1],y[0]*y[1]-p
I don't know for sure how other systems actually implement implicit
plotting.
I would think you might try to use that the gradient of F
is orthogonal to the level set curves. In particular
if (x_0,y_0) is a solution to F(x,y)=0, you know that to follow
the level set curve you should move in a dir
I've been working on a list plot that interpolates a surface from a
list of 3-tuples.
Here is an example where the points were randomly chosen (by sampling
from a normally distributed random variable in x,y,z coordinates) and
interpolated into a surface.
http://sage.math.washington.edu/home/jk
Even in the original dmg that I used to make my dmg, there were no tex
files.
In devel there was only sage and sage-main, no doc and doc-main.
Josh
On Jan 7, 1:01 am, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Jan 6, 2008 10:44 PM, Justin C. Walker <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
> >
I wanted to check that moving via finder work. So thats good.
The tex issue may be because I created the binary dist from another
binary dist.
I was mostly worried about moving via finder because that did not work
in the initial version.
I have no idea why david joyner couldn't mount it, hopefu
David, can you test the md5sum of the downloaded .dmg file.
At the terminal
md5
On Jan 6, 11:48 am, "Justin C. Walker" <[EMAIL PROTECTED]> wrote:
> On Jan 5, 2008, at 22:08 , Joshua Kantor wrote:
>
>
>
> > Hello. for the dvd we are including a dmg file. Th
MAIL PROTECTED]> wrote:
>
> > and what about the (linux2,gfortran) pair that I tried to force and
> > that still does not seem to be accepted?
> > best,
> > Johann
>
> > On Jan 4, 2:57 pm, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
> > > Wel
Hello. for the dvd we are including a dmg file. There was some
problems with the initial version of this. I believe the following is
working,
but if anyone else could test that following the instructions works
fine on their system that would be appreciated. Again this is osx 10.4
intel
http://sag
Also when I do start sage I get an exception
"Unable to determine current branch"
On Jan 5, 2:23 pm, Joshua Kantor <[EMAIL PROTECTED]> wrote:
> I tried the osx 10.4 dmg. It mounts correctly as a volume.
>
> However, when I drag the sage folder over,
> about ha
I tried the osx 10.4 dmg. It mounts correctly as a volume.
However, when I drag the sage folder over,
about halfway through I get a dialog
(You cannot copy "singular" to the destination because its name is the
same as the name of an item on the destination except for the case of
some characters)
t;> import os
> >>> os.name
>
> 'posix'
>
> so sys.platform is fine. The problem is that numpy/distutils/fcompiler/
> __init__.py is *not* using sys.platform to initialize platform
> variable, but rather os.name..
> Johann
>
> On Jan 4, 2:
Another thought. Please go into sage-2.9*/local/bin and
do
./python
to start the local python
what does
import sys
sys.platform
output.
(it should be something like linux2, but I wonder if it might come out
posix for you)
Josh
On Jan 4, 1:22 pm, mabshoff <[EMAIL PROTECTED]
dortmund.de> w
We modify numpy so that it is supposed to use sage_fortran, which
wraps either the g95 fortran we include
or a fortran compiler the user specifies. The point of this is to
avoid problems with the user having
multiply incompatible fortran compilers (since there are a bunch)
Unfortunately somethin
Hmm. That is very weird that it saw your system as posix and not
linux.
Out of curiosity what does uname -a output on your system.
On Jan 2, 5:34 pm, Johannct <[EMAIL PROTECTED]> wrote:
> hi,
> I downloaded sage-2-9-1-1 and I am running on the following system :
>UNAME: Linux localhost.lo
We currently have no way to compute svd of sparse matrices.
Scipy has an experimental wrapper of arpack
http://www.caam.rice.edu/software/ARPACK/
which can computes eigenvalues of sparse matrices and svd which is now
built with sage, however,
only the eigenvalue functionality is wrapped.
Spars
I was making that statement relative to the general level of
intelligence of slashdot comments.
Josh
On Dec 8, 11:51 am, "John Cremona" <[EMAIL PROTECTED]> wrote:
> On 08/12/2007, Joshua Kantor <[EMAIL PROTECTED]>
but the comments are pretty good.
On Dec 8, 11:12 am, Joshua Kantor <[EMAIL PROTECTED]> wrote:
> The articles summary is pretty absurd.
>
>Josh
>
> On Dec 8, 10:40 am, Robert Bradshaw <[EMAIL PROTECTED]>
> wrote:
>
> &
The articles summary is pretty absurd.
Josh
On Dec 8, 10:40 am, Robert Bradshaw <[EMAIL PROTECTED]>
wrote:
> On Dec 8, 2007, at 8:41 AM, William Stein wrote:
>
> > On Dec 8, 2007 7:39 AM, Ondrej Certik <[EMAIL PROTECTED]> wrote:
> >> On Dec 8, 2007 4:13 P
I would be interested in helping with a PDE toolbox. I didn't want to
work on it alone as I'm pretty sure I'd make some stupid design
choices. It would be nice to start some work on PDE functionality in
SAGE.
On Dec 6, 6:40 pm, Tim Lahey <[EMAIL PROTECTED]> wrote:
> I can't help with SPM, but I c
Actually, don't use the spkg-install I posted. It seems to work but
near the end of the compile there are some weird missing symbols
problems on OSX.
I need to play around a bit more, I'll post again when I have it
actually working on OSX.
Josh
On Dec 6, 2:53 am, Joshua Kant
Wow, this pacakge is HUGE. I didn't realize it was this large. I hope
by cutting out extraneous stuff (docs, examples) we can make this much
smaller.
Marshall: if you (or anyone) want to build this on a mac
use this spkg-install
http://sage.math.washington.edu/home/jkantor/spkgs/spkg-install.w
scipy has an error function that takes complex arguments
sage: import numpy, scipy
sage: from scipy import special
sage: j=numpy.complex(0,1)
sage: -j*float(sqrt(pi))*special.erf(2*j)/2
(16.45262776550727+0j)
Unfortunately numpy and sage's complex numbers are not compatible yet.
On Nov 15, 1
AIL PROTECTED]
dortmund.de> wrote:
> On Nov 9, 3:14 am, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
> Hi Josh,
>
> > Yeah. the missing symbol is because its linking against libblas in /
> > usr/lib, which was compiled with some other probably older fortran
> > (w
Yeah. the missing symbol is because its linking against libblas in /
usr/lib, which was compiled with some other probably older fortran
(why oh why can't all the fortrans get along).
I'm curious about what people think is a good solution here.
If they have a libblas in /usr/lib thats broken lik
About the cvxopt problem
Now the package checks sage_fortran -v and uses a setup.py that links
against f95
if you have g95 and a setup.py that links against gfortran otherwise.
(this package is in my spkgs cvxopt-0.8.2.p5.spkg)
I have tested it with both g95 and gfortran.
Josh
On Nov 7, 3:
Ok, then I'll look at sage_fortran --version.
On Nov 7, 1:00 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Nov 7, 2007 12:52 PM, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
>
>
> > Thats expected, since the fix I made was for g95 builds and it
Thats expected, since the fix I made was for g95 builds and it worked
by linking in f95, which won't be around using gfortran. Should be
easy to add a test for gfortran.
I was going to test whether or not $SAGE_FORTRAN was set and use an
appropriate setup.py depending on whether or not this is tr
Stein" <[EMAIL PROTECTED]> wrote:
> On Nov 7, 2007 1:00 AM, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
>
>
> > The problem is that on Linux, if you don't have the opengl libraries
> > (typically libgl1-mesa-dev) then vtk won't build but the package exits
The problem is that on Linux, if you don't have the opengl libraries
(typically libgl1-mesa-dev) then vtk won't build but the package exits
successfully. I guess I need to add my own tests for open gl libraries
on linux like I do for tcl/tk.
Josh
On Nov 5, 10:09 pm, "William Stein" <[EMAIL PR
Good to see that you got things sped up.
The factor of 30 or so slowdown is consistent with my experience
comparing to matlab.
I believe the issue is that due to the way the interface to gsl works
explanation:
The gsl ode solver is a c function that requires a C function pointer
to be passed to
Pretty pictures. Seriously if you look at Mathematica's website you
see lots of crazy pictures of crazy graphs and such. The maple website
shows a video with 3d models of a robot walking along.
Does it matter whether those pictures have any mathematical content,
NO.
I know that this has been talk
; > > > sage: f = R('x^2')
> > > > sage: f.factor()
> > > > ---
> > > >Traceback (most recent call
> > > > last)
> > > > /Volumes/HOME/robert/sage
In reading the article some thoughts I had.
1. The example about the paper on the infinite group seems like a very
weak example to me.
It seems the problem is not that the programs used are proprietary,
but that the author of the paper gave no code.
If she used SAGE but didn't give code, then the
The eigen routine uses numpy. If you do
p,e=m.eigen()
then p is an array of eigenvalues and e is a matrix whose columns are
eigenvectors.
The documentation works fine in my local install not sure why it fails
on sage.math
Josh
On Aug 3, 2:43 pm, Robert Bradshaw <[EMAIL PROTECTED]>
wrote:
>
There are two levels of problems
1. We can't include 64 bit compilers because we have no binaries that
work for them.
2. The ar extracting hack is because we are tricking numpy's
distutils into doing what we want.
(More detailed explanation: Numpy's distutils has python classes for
different
SAGE now includes f2py which auto-generates python wrappers for
fortran code. We have a magic %fortran command that allows one to
write fortran directly in the notebook. We also include weave, which
does the sage things but for C (we've had that for a while).
I have written some notes that give e
I noticed that dealing with complex numbers doesn't work as well as I
would expect. Simple example, how do you get sage/maxima to perform
complex division
sage: 1/(1+I)
output 1/(1+I)
I couldn't find any way to simplify other than CC(1/(1+I)) which
probably isn't want you want.
also
It doesn
I just downloaded the sage-2.6 OSX intel binaries. They ran fine but
when I tried to clone a repository and do -ba
I got the errors
usr/bin/ld: Undefined symbols:
___gmpn_add_n referenced from libntl expected to be defined in /Users/
was/tmp/sage-2.6.alpha1/local/lib/libgmp.3.dylib
___gmpn_addmul_
ishes this.
Josh
On Jun 5, 8:43 am, "Justin C. Walker" <[EMAIL PROTECTED]> wrote:
> On Jun 5, 2007, at 01:18 , Joshua Kantor wrote:
>
>
>
> > Thanks, I had forgot about that sort of thing and it might work. I'm
> > not sure because some of the libra
Thanks, I had forgot about that sort of thing and it might work. I'm
not sure because some of the libraries linked in are static.
My python module links against libsuperlu.a which is static which
links against libblas. Because
libsuperlu.a is static I'm not sure whether the static or dynamic
This is a C question, I was hoping someone had some advice on.
Many linear algebra libraries such as lapack, and blas have an error
handling routine called xerbla_ that is called if there is an
unrecoverable error. Unfortunately this often calls exit which cannot
be caught so sage exits.
If one
ve used the netlib SparseBLAS C reference implementation with
> GSL before, and it worked pretty smoothly.
>
> --Mike
>
> On 6/2/07, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
>
>
> > I am implementing a sparse matrix class for real doubles (finite
> &g
I am implementing a sparse matrix class for real doubles (finite
precision real numbers.)
The storage format I am using is called compressed sparse column. This
is the standard format
used by all sparse matrix libraries as well as matlab
http://www.netlib.org/linalg/html_templates/node92.html
It
Luckily I have been learning lisp on the side for fun for a while.
I'll have to take a look at that.
Josh
On Apr 30, 10:39 am, Nick Alexander <[EMAIL PROTECTED]> wrote:
> Joshua Kantor <[EMAIL PROTECTED]> writes:
> > I am actually interested in the in
ement.pyx
>
> see the method:
>
> RingElement.__mul__()
>
> and RingElement.__add__() and the documentation at the top of the module.
>
> Ondrej
>
> On 4/30/07, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
>
>
> > I am actually interested in the inte
stinction between
> evaluation and simplification. Evaluation replaces
> variables by their values. Simplification replaces
> an expression by an equivalent one, independently of
> variable bindings.
>
> Somewhat strangely evaluation is not recursive which
> sometimes leads to counterint
Disclaimer: I think this may have more or less been covered in the
earlier mega-discussion on symbolic computation. Also the whole reason
we use maxima is to avoid dealing with the problems I'm describing but
I still
would like to think about it a bit and am curious if anyone has any
insight.
I
There is no reference counting in C because C does not do automatic
garbage collection, you have to do that yourself when you write C. If
you don't free memory you allocated you just get a memory leak it
won't automatically notice because it has no way of knowing whether or
not that memory is act
Hey Brian,
I think all the issues I've come across are ones I've told you about.
To recap
1. Add capability so multiple groups of engines and remote controllers
can operate on one machine without conflicting.
2. Keep track of the worker and controllers (PID)/clean up spawned
processes graceful
Perhaps related (and maybe already fixed). But I noticed the
following
do
M=MatrixSpace(ZZ,1000)
then repeatedly do
m=M.random_element();get_memory_usage()
You should see the memory usage go up by around 16 mb per execution
and it doesn't appear to ever go down,
If you do the same thing with RD
http://sage.math.washington.edu/home/jkantor/talks/
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ROTECTED]> wrote:
>
> > > I've got sudo, and a class at 9:30 -- I'll take care of it.
>
> > > On Thu, 8 Feb 2007, Joshua Kantor wrote:
>
> > > > I'll try to get in the server room tomorrow to look unless someone
> > > > else gets t
; wrote:
> On Wed, 07 Feb 2007 23:27:33 -0700, Joshua Kantor <[EMAIL PROTECTED]> wrote:
>
> > It appears as of around 10:30 p.m. feb 7 that sage.math and
> > modular.math are down and unpingable.
>
> Those machines are completely different; the only things they have
It appears as of around 10:30 p.m. feb 7 that sage.math and
modular.math are down and unpingable.
Josh
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For mor
I was wondering if anybody had any ideas on good (platform
independent) ways to figure out the number of CPUs a computer running
sage has available, (short of asking the user).
Josh
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I was planning on talking and hadn't decided what I was talking about.
I would be willing to do this unless
somewhat else wants to. I assume that yi will talk about distributed
sage so I would mostly focus on
chainsaw and threading issues.
Jos
On Feb 2, 2:36 pm, David Harvey <[EMAIL PROTECTED]
Are you doing anything with the SIMUW program again.
Josh
On Feb 6, 5:34 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> Just to possibly spark discussion of ideas for SAGE summer development
> projects
>
> --- Forwarded message ---
> From: "Jennifer S. Balakrishnan" <[EMAIL PROT
In response to Williams sage-2.0 plan I wanted to describe what I had done
with using gsl to implement a numerical ode solver. I believe that the
patch containing this will be applied after
doing a recent pull or upgrade but I'm not sure(is this true?). If not I
can send patches for people to pla
That worked, thanks.
Josh
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For more options, visit this group at http:/
I tried to do sage upgrade, everything appeared to succeed but when I
try to start sage I get.
Traceback (most recent call
last)
/home/jkantor/sage-1.4/local/bin/ in ()
/home/jkantor/sage-1.4/local/lib/python2.5/site-packages/sage/all_cmdline.py
in ()
> 1 from sage.all import *
I was at a conference this weekend where someone presented a maple
package they had been writing for doing certain differential geometry
computations. His packages is mostly independent of anything maple
specific however it does use their PDE solver intensively. This PDE
Solver is a part of maple
This idea is probably totally naive as my understanding of the
exact mechanics of shared object libraries is still somewhat black
boxish.
Say I have a routine that takes a pointer to some C function. I define
a
shared object library of C function wrappers. Say it just has a C
function foo. Then s
Its hard to tell, the documentation is at the moment sparse and doesn't
really illustrate much. I looked over the api and it seems to be very
very specialized to General Relativiy research. They don't give any
examples of curvature computations and it doesn't seem to have that
capability.
Still it
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