le to keep running the calculations I've worked on even
if I find myself without an institutional Mathematica or Matlab
license someday.
Anyway, I don't mean to belabor the introductory essay, just to say
that I think it ought to be published separately from the tutorial.
Regards,
Jason Me
On Nov 6, 4:11 am, Jan Groenewald <[EMAIL PROTECTED]> wrote:
> What about being able to click on "tutorial" somewhere near "new worksheet"
> in the sage notebook? Which could present you cell by cell with explanatory
> text, and then you execute the command to continue, and get a chance to try
>
On Sep 18, 2:09 pm, Burcin Erocal <[EMAIL PROTECTED]> wrote:
> On Thu, 18 Sep 2008 06:57:20 -0700 (PDT)
>
> Jason Merrill <[EMAIL PROTECTED]> wrote:
>
> > On Sep 18, 8:01 am, Burcin Erocal <[EMAIL PROTECTED]> wrote:
>
> > > Did you manage
This is fixed in 3.1.2
http://trac.sagemath.org/sage_trac/ticket/3907
JM
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On Sep 18, 8:01 am, Burcin Erocal <[EMAIL PROTECTED]> wrote:
>
> There will be a way to represent formal integration and summation.
> I believe avoiding automatic simplification of arbitrary expressions
> requires more work (I haven't checked this yet.), but even that
> shouldn't be too complicate
On Sep 17, 12:37 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
>
> Jason,
>
> Just a heads up -- your code above is going to become pointless when we switch
> to using Ginac as a backend for symbolic manipulation, since Sage will no
> longer
> keep its own expression tree.
Thanks for the heads
On Sep 17, 2:20 am, Jason Merrill <[EMAIL PROTECTED]> wrote:
> Here's a monkeypatch that makes this work(ish)
>
> from sage.calculus.calculus import SymbolicExpression
> class FormalSymbolicExpression(SymbolicExpression):
> def __init__(self,expr):
> self
I was musing about formal symbolic expressions on sage support:
http://groups.google.com/group/sage-support/browse_thread/thread/78dc8d2d476acc46
but thought it was time to move it over to devel. The motivation is
to have a nice notation for formal integrals and derivatives:
sage: integral(sin
Thanks to all for the practical advice and encouragement, and also to
dphilp for some useful off-list comments. I definitely don't intend
to try and push anything through that will cause all kinds of
troublesome breakages, and I also don't want to waste lots of my own
time or yours. I'll probabl
Is there a convention for "see also" information? I thought I'd fix
http://trac.sagemath.org/sage_trac/ticket/3422 . The doc has
\begin{seealso}
See \seeurl{http://www.dtc.umn.edu/\~{}odlyzko/zeta_tables/}{}
\end{seealso}
But when I run
sage: search_doc('seealso')
the odlyzko fil
On Sep 13, 5:02 pm, mabshoff <[EMAIL PROTECTED]> wrote:
> On Sep 13, 10:54 am, Jason Merrill <[EMAIL PROTECTED]> wrote:
> Hi Jason,
>
> > I tried to build 3.1.2.rc2 on OS X 10.5.4 intel macbook. As with the
> > previous release candidate, the buil
On Sep 13, 7:04 am, mabshoff <[EMAIL PROTECTED]> wrote:
> Hello folks,
>
> here is the somewhat delayed 3.1.2.rc2. We fixed some build issues,
> fixed a bunch of annoying doctest failures and updated Cython due to
> some recently discovered cpdef issues. So this rc2 contains a couple
> more fixed
I have some ideas and questions I'd like to share about how to make a
nice interface for derivatives of objects with several variables and/
or dimensions. Right now, Sage has diff for partial derivatives, and
gradient for gradients, but I think there's room for extending Sage's
capabilities.
I'm
On Sep 9, 6:35 pm, Justin Walker <[EMAIL PROTECTED]> wrote:
> Hi, all,
>
> Whilst looking at some code, I noticed that a computation was being
> repeated on each call, although the inputs to the computation never
> changed (these were values used to define an instance of a class). I
> decid
On Sep 9, 5:22 am, mabshoff <[EMAIL PROTECTED]> wrote:
> Arg, I know what is wrong and it was a dumb mistake of mine. The spkg
> at
>
> http://sage.math.washington.edu/home/mabshoff/release-cycles-3.1.2/rc...
>
> fixes the issue. My apologies, it seems that everything that can go
> wrong will go w
On Sep 8, 7:42 pm, Jason Merrill <[EMAIL PROTECTED]> wrote:
> One additional consideration is that it is useful in this case to know
> whether an expression is constant, as a performance consideration.
> The regular algorithm works (slowly) on constant input, but it's
>
Looking at http://trac.sagemath.org/sage_trac/ticket/3980, I formed
the opinion that a lot of times where .variables() or .arguments() is
used, it may be a mistake.
On that ticket, it was pointed out that find_root(sin,-1,1) throws an
error. Maybe this is a bug, maybe not, but in any case,
plot(
Maybe some of you have seen this before, but I think try ruby is an
excellent model to follow for pulling people in. No registration, and
it offers a nice guided tutorial if you want, with plenty of leeway to
experiment on your own. At the end of a little tutorial you could
offer options for goi
There are many operations in Sage that take a function/expression as
the first argument, and one or more variables with ranges as
subsequent arguments. The prototype is plot(x^2*sin(x),-4*pi,4*pi).
It would be nice if the syntax were consistent across all such
functions. There are already ticket
On Sep 3, 8:35 pm, Andrzej Giniewicz <[EMAIL PROTECTED]> wrote:
> Just noticed one thing, during close (by ctrl+c) of sage that run
> notebook (with sage --notebook) I got unhandled error (it's 100%
> reproducible for me):
>
> 2008-09-04 02:30:56+0200 [-] Saving notebook...
> 2008-09-04 02:30:56+0
Live syntax highlighting for the notebook would be awesome. I'm sure
it would be hard to implement, but have a look at this demonstration
of codemirror:
http://marijn.haverbeke.nl/codemirror/jstest.html
which does live syntax highlighting for javascript in the browser.
The details are pretty ni
On Sep 2, 10:40 pm, mhampton <[EMAIL PROTECTED]> wrote:
> Thanks very much for this response. ffmpeg looks very useful to me, I
> am checking it out right now. It is unclear to me what the overlap is
> with mplayer/mencoder. It seems that ffmpeg is somewhat leaner and
> more portable, so I am t
Where there is a choice, Sage should feel like traditional mathematics
when posing mathematical problems, rather than a traditional
programming language. The following interface ideas follow from that
principle. Could this be a starting point for an SEP?
Mathematicians are expected to be able t
I tried to install pynac on OS X 10.5, but it died. Here's an excerpt
of install.log
pynac-0.1
Machine:
Darwin jmerrill.local 9.4.0 Darwin Kernel Version 9.4.0: Mon Jun 9
19:30:53 PDT 2008; root:xnu-1228.5.20~1/RELEASE_I386 i386
Deleting directories from past builds of previous/current versions
On Aug 21, 6:54 pm, Robert Bradshaw <[EMAIL PROTECTED]>
wrote:
> On Thu, 21 Aug 2008, Jason Grout wrote:
>
> > What do people think of changing line() and text() to only give 2d
> > graphics. Currently, the behavior for line() seems to be something
> > like, passing in a list of coordinates:
>
>
On Aug 24, 6:55 pm, Jason Merrill <[EMAIL PROTECTED]> wrote:
> In hopes that it may be a useful reference during the current work on
> symbolics, I wrote a toy Mathematica program for transforming a single
> higher order ODE into a system of first order ODEs. Most of the f
On Aug 25, 12:50 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Mon, Aug 25, 2008 at 4:47 AM, Burcin Erocal <[EMAIL PROTECTED]> wrote:
>
> > On Sun, 24 Aug 2008 15:55:25 -0700 (PDT)
> > Jason Merrill <[EMAIL PROTECTED]> wrote:
>
> >
On Aug 25, 7:46 am, "Ondrej Certik" <[EMAIL PROTECTED]> wrote:
> On Mon, Aug 25, 2008 at 12:55 AM, Jason Merrill <[EMAIL PROTECTED]> wrote:
>
> > In hopes that it may be a useful reference during the current work on
> > symbolics, I wrote a toy Mathe
or scipy.
Hopefully this will be useful as one example of the kind of
manipulations that pattern matching makes possible. I'm happy to
answer any more questions about it.
Regards,
Jason Merrill
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To post to this group, send email to sage-
Brian Hayes writes a regular column for American Scientist called
Computing Science. In his latest article, "Calculemus!"
http://www.americanscientist.org/issues/pub/2008/5/calculemus/1, Hayes
suggests that widely available tools for doing simple calculations and
mathematical experiments have not
> > On Thu, Aug 21, 2008 at 11:28 PM, David Philp
> > <[EMAIL PROTECTED]> wrote:
>
> All the explanations that "sage can do that" have involved python
> lists, because I used names and examples like 'data = {1, 2, 3}'. But
> the power of ReplaceAll (the /. operator) is that it places no
>
On Aug 21, 10:39 pm, Tim Lahey <[EMAIL PROTECTED]> wrote:
> On Aug 21, 2008, at 10:22 PM, Jason Merrill wrote:
>
> > That sounds good too, as long as boundary conditions are input in the
> > form of equations rather than grunts. I like it a little less in the
> &g
On Aug 21, 9:01 pm, Tim Lahey <[EMAIL PROTECTED]> wrote:
> On Aug 21, 2008, at 8:52 PM, Jason Merrill wrote:
>
>
>
>
>
> > I guess Mathematica is the leader on solving differential equations
> > symbolically, and pending other great ideas, I think their syn
On Aug 21, 7:50 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> On Thu, Aug 21, 2008 at 4:41 PM, David Philp <[EMAIL PROTECTED]> wrote:
>
> > I don't know how much of the below is possible or available in Sage.
> > But I miss they syntax from Mathematica. I love the fact that it
> > doesn't wear
I thought I would take my first shot at contributing to Sage by making
desolve return a SymbolicExpression instead of a string. Doing so
turned out to be pretty easy, but I got hung up trying to get the
other methods in desolvers.py to do the same. Anyway, after getting
my hands in this code a l
On Aug 21, 7:44 am, Andelf <[EMAIL PROTECTED]> wrote:
> I am a starter, so I don't understand why this goes wrong
>
> I typed:
>
> x = var('x')
> f = log(2+sqrt(arctan(x)*sin(1/x)))
> lim(f, x=0)
>
> and got:
> Traceback (click to the left for traceback)
> ...
> Is sin(1/x)*atan(x) positive or zer
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