I have seen this from time to time as well, though was never able to
reliably reproduce it (and it hasn't happened to me for a while, so I
thought it was fixed). Sometimes when running a calculation *or*
adding/removing cells the notebook process (not the sage process
actually doing the co
On Sat, May 30, 2009 at 10:50 PM, Alasdair wrote:
>
> You use solve_rec like this:
>
> maxima.load('solve_rec')
> maxima('solve_rec(f[n+2]-3*f[n+1]+2*f[n]=2^n,f[n],f[0]=1,f[1]=0)')
>
Also, see
http://maxima.sourceforge.net/docs/tutorial/en/gaertner-tutorial-revision/Pages/DiffEq0001.htm
This mig
You use solve_rec like this:
maxima.load('solve_rec')
maxima('solve_rec(f[n+2]-3*f[n+1]+2*f[n]=2^n,f[n],f[0]=1,f[1]=0)')
I think that solve_rec can in fact solve a larger class of difference
equations than linear equations with constant coefficients, but my
use doesn't involve anything more tha
Ironically, I did something just like this at a talk this week. But I
used something like
lambda x,y: abs(zeta(x+i*y))
(actually not that, but I hope that will work).
At least one of these should really be implemented as complexplot3d or
something like that. Does that seem like a useful func
Alasdair wrote:
> I can solve a difference equation using the Maxima interface, and the
> "solve_rec" package included with Maxima. Apparently SymPy can also
> solve difference equations, but I can't find any documentation or
> examples to show how this is done. So, two questions:
>
> 1) How c
Thanks a lot. Much simpler than I thought it would be. Very fine
instructive example.
Yours, littlemathteacher.
On 30 Mai, 17:49, Jason Grout wrote:
> littlemathteacher wrote:
> > Dear Supporters,
>
> > first of all thanks to you all for doing such a great support job to
> > me so far.
>
> > Now
On Sat, May 30, 2009 at 5:13 PM, Alasdair wrote:
>
> I can solve a difference equation using the Maxima interface, and the
> "solve_rec" package included with Maxima. Apparently SymPy can also
> solve difference equations, but I can't find any documentation or
> examples to show how this is done
I'm just wondering about ordering the DVD. Does that come with all
the additional packages (minus experimental)? This is a fairly
trivial question, but I just want to install everything just to be
able to show it off to my heavily pro-mathematica math department.
--~--~-~--~~
I can solve a difference equation using the Maxima interface, and the
"solve_rec" package included with Maxima. Apparently SymPy can also
solve difference equations, but I can't find any documentation or
examples to show how this is done. So, two questions:
1) How can difference equations be s
On Sat, May 30, 2009 at 12:44 PM, avra wrote:
>
> Hi William,
>
> Thank you for the info.
>
> Would this be the appropriate way to incorporate everyone?
That seems reasonable to me.
William
>
> \newcommand{\etalchar}[1]{$^{#1}$}
> \bibitem[S{\etalchar{+}}09]{sage}
> W.\thinspace{}A. Stein e
Hello,
On Sat, May 30, 2009 at 3:27 PM, wrote:
> I am sorry for my newbie question, but doesn't it seem natural that a
> separate installation of Sphinx shouldn't be needed.? Is Sphinx not
> included with Sage?
He means a new Sphinx document. Something you'd get by running the
sphinx-quicksta
#5371 will set better defaults, but only for a new server
installation.
For an existing notebook, to adjust the current save times on
nb.sobj mimic the following session at the sage command line:
sage: nb = load('/home/somebody/.sage/sage_notebook/nb.sobj',
compress=False)
sage: print nb.conf()
Dear David,
On 30 Mai, 23:51, davidp wrote:
> I am writing a manual for a Sage package I am developing. It seems
> natural to use Sphinx/reST.
I am sorry for my newbie question, but doesn't it seem natural that a
separate installation of Sphinx shouldn't be needed.? Is Sphinx not
included wi
Hi!
On 30 Mai, 14:16, simon.k...@uni-jena.de wrote:
...
> sage: R._has_coerce_map_from(R)
>
> ---
> TypeError Traceback (most recent
> call last)
>
> /home/SimonKing/.sage/temp/sage.math.
Rob points out that some other tickets are pertinent too, notably
#5371. Following the instructions there made my notebook usable again
(while Gonzalo's script is still running).
He also mentioned #5895, which I'm going to go look at now. Thanks!
Kiran
On May 30, 5:24 pm, Kiran Kedlaya wrote:
I guess I figured it out. In the conf.py file:
# The reST default role (used for this markup: `text`) to use for all
documents.
default_role = 'math'
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this
I am writing a manual for a Sage package I am developing. It seems
natural to use Sphinx/reST. I made an independent installation of
Sphinx and eventually realized that to typeset mathematics, I need to
write, for example, :math:`\Gamma` instead of Sage's cleaner version: `
\Gamma`. The latter
Followup: I think the underlying issue here was addressed in ticket
#5880. My problem was that I had a lot of old snapshots created by
pre-3.4.1 versions of sage, and they were tying the file system in
knots. I'm now running the script Gonzalo posted to #5880 that deletes
redundant snapshots; that
I experienced similar symptoms a while back. The notebook frequently
backs up individual worksheets in a "snapshots" directory and you may
have millions of them, but I don't think this was the root of the
problem. There is also a .sage/sage_notebook/nb.sobj file that gets
backed-up regularly (e
Hi William,
Thank you for the info.
Would this be the appropriate way to incorporate everyone?
\newcommand{\etalchar}[1]{$^{#1}$}
\bibitem[S{\etalchar{+}}09]{sage}
W.\thinspace{}A. Stein et~al., \emph{{S}age {M}athematics {S}oftware
({V}ersion
3.3)}, The Sage~Development Team (specific pac
sure, i think it is a bit weird as well. It certainly has behaviour
that is unexpected. I think this will cause a lot of confusion, so I
think openning a ticket is a good idea.
As for multiplying those two polynomials, it seems that what you have
said works. I will give it a try.
Cheers
On 3
Adam,
according to the FAQ No. 3.9: "It may be that you have Tcl/Tk installed and
that your system's python recognizes it, but Sage's python does not, To fix
that, install the tcl/tk development library (something like tk8.5-dev)."
Then, you can test if this is the case giving:
sa
> > I just tried a test with 3.4.1, and I was seeing 100% CPU usage (and
> > impressive memory usage) even when the notebook was idle. This is a
> > Fedora 64 system, so I also tried using a patched 4.0.rc1 that
> > upgraded python to 2.5.4 (since that fixed other memory issues); that
> > way, I d
Dear Laurent,
I think the idea is that Sage is "with batteries included" and should
not interfere with anything that you have on your system. Namely,
since Sage is rather big, it is very probable that Sage ships
something that is already installed on your computer -- in your case,
Python. So, eit
>> I've tried to import both sage and pygtk without success, both in
>> python and sage console. Please tell me if you can achieve this. I
>> guess you have to install the module within sage, even if it is
>> installed in the system, but outside sage.
>>
The same here :
#! /usr/bin/sage -p
Here's what I tried:
download tcl8.5.7-src.tar.gz and tk8.5.7-src.tar.gz from
http://www.tcl.tk/software/tcltk/download.html
run ./configure --enable-framework --disable-xft in the unix/
subdirectory of tcl, then make & make install as normal
run ./configure --enable-framework --disable-xft in th
On Sat, May 30, 2009 at 11:10, pang wrote:
>
> > In the case where I'm using the test.sage trick, can I still import my
> > own modules
> > or have access to everything ?
> > I guess the answer is Yes, isn't ?
> >
> I've tried to import both sage and pygtk without success, both in
> python and sa
littlemathteacher wrote:
> Dear Supporters,
>
> first of all thanks to you all for doing such a great support job to
> me so far.
>
> Now I want to make complex analysis visible and to plot 3d-graphics
> either of real or imaginary parts of functions.
>
> The first step would be to plot the exp
littlemathteacher wrote:
> Dear Supporters,
>
> first of all thanks to you all for doing such a great support job to
> me so far.
>
> Now I want to make complex analysis visible and to plot 3d-graphics
> either of real or imaginary parts of functions.
>
> The first step would be to plot the exp
On May 30, 2009, at 11:10 AM, pang wrote:
> I've tried to import both sage and pygtk without success, both in
> python and sage console. Please tell me if you can achieve this. I
> guess you have to install the module within sage, even if it is
> installed in the system, but outside sage.
>
Sag
> In the case where I'm using the test.sage trick, can I still import my
> own modules
> or have access to everything ?
> I guess the answer is Yes, isn't ?
>
I've tried to import both sage and pygtk without success, both in
python and sage console. Please tell me if you can achieve this. I
guess
On May 30, 12:30 am, William Stein wrote:
> On Fri, May 29, 2009 at 7:03 PM, gary wrote:
>
> > I'm running Ubuntu 9.04 in andLinux
> > (http://www.andlinux.org)
> > a linux kernel that runs on MS Windows. Up to now, it's behaved just
> > like any other Ubuntu.
>
> > I've compiled sage on othe
On Sat, May 30, 2009 at 7:21 AM, Kiran Kedlaya wrote:
>
>
>
> On May 29, 1:50 pm, William Stein wrote:
>> 2009/5/29 Kiran Kedlaya :
>>
>>
>>
>>
>>
>> > On Apr 14, 3:47 pm, William Stein wrote:
>> >> On Tue, Apr 14, 2009 at 12:30 PM, Kiran Kedlaya wrote:
>>
>> >> > I see 100% CPU usage when the
On May 29, 1:50 pm, William Stein wrote:
> 2009/5/29 Kiran Kedlaya :
>
>
>
>
>
> > On Apr 14, 3:47 pm, William Stein wrote:
> >> On Tue, Apr 14, 2009 at 12:30 PM, Kiran Kedlaya wrote:
>
> >> > I see 100% CPU usage when the notebook is processing a cell. I don't
> >> > remember whether I still
Dear Supporters,
first of all thanks to you all for doing such a great support job to
me so far.
Now I want to make complex analysis visible and to plot 3d-graphics
either of real or imaginary parts of functions.
The first step would be to plot the exponential function just like in
the german o
Hi!
A little addendum:
> For a similar reason, neither f nor g are elements of R.
I would agree that it is a little confusing that something is equal to
an element of a polynomial ring but is not an element of that ring, or
in pure form:
sage: R = QQ['x','y']
sage: R1.=QQ[]
sage: R2.=QQ[]
Hi!
On 30 Mai, 12:47, amps wrote:
...
> TypeError: unsupported operand parent(s) for '*': 'Multivariate
> Polynomial Ring in z0 over Rational Field' and 'Multivariate
> Polynomial Ring in z1 over Rational Field'
> sage:
>
>
> Basically, I want to be able
Sorry to reply to myself, here is what I really want to do.
continuing my last post I will put the entire code again).
sage: R=PolynomialRing(QQ,2,'z')
sage: z=R.gens()
sage: x=tuple([z[0]])
sage: p=SFAPower(QQ)
sage: f=p([2,1]).expand(1,alphabet=x)
sage: f
z0^3
sage: f in R
False
sage: f==z[0]^
Hello,
I am wondering how to coerce a symmetric function in a certain number
of variables into a polynomial ring with larger variables. I am
getting some rather confusing output.
--
| Sage Version 3.4.2, Release Date: 2009-05-0
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