On 6/18/07, Dorian Raymer <[EMAIL PROTECTED]> wrote:
> Sorry for the delay in response.
>
> > What about gap("2323")? Does that fail too? What about gap.eval("2323")?
>
> gap("2323") also returns the same Syntax error.
>
Just to add to this thread, Steve Linton wrote some clever C code for
the kernel of gap 4 in order to make some special "pexpect mode" work
better. For a long time we distributed a patched version of gap 4 with that
code in it. I'm sure gap 3 won't have that code, and this might have
something to do with the problems you are noticing.
-- William
> gap.eval("2323") works, as does gap.eval("RequirePackage(\"chevie\")"),
> although the latter returns a raw, unformatted/unpretty string indicating
> the package loaded.
>
>
> > I am interested in this and would be very interested in detailed
> step-by-step
> > instructions on how to install Chevie in SAGE.
>
> I could write up a more detailed description of the installation processes I
> did. I'll try working on tweaking the interface a bit more first though.
>
> -Dorian
>
>
>
> On 6/12/07, David Joyner <[EMAIL PROTECTED]> wrote:
> >
> > On 6/12/07, Dorian Raymer <[EMAIL PROTECTED]> wrote:
> > > I tried installing and using gap3 in sage, and this is what happened:
> > >
> > > I installed the all-in-one gap3r4p4.zoo into SAGEHOME/local/lib
> > >
> > > I ended up using the gap-ibm-i386-linux-gcc precompiled binary they
> > > provided (compiling from src failed, but this binary worked on my
> system,
> > > which is kubuntu7.04) I ran some example code the install readme
> provided as
> > > a test, and it succeeded.
> > >
> > > I edited the gap.sh for the sage environment and put a symlink in
> > > SAGEHOME/local/bin
> > >
> > > I made a branch of sage so I could experiment with the gap.py
> pexpect
> > > interface...
> > >
> > > It turns out that gap3 and 4 have different command line options
> (among
> > > other differences), so the sage interface was pretty broken. I got to
> the
> > > point where at least the gap3 console would start in sage, (it looked
> just
> > > like it did in the bash shell! (joking)).
> > > After playing around with omitting different command line flags and
> > > disabling things related to saving and loading gap workspaces, the
> interface
> > > started to show signs of life! (i.e. there was no failure in spawning
> the
> > > gap process)
> >
> > This is great.
> >
> > > I called the version method 'gap.version()' and it returned the right
> thing
> > > (stuff about version 3). Unfortunately, evaluation of expressions (like
> > > n=gap(2323)) return 'Syntax error: expression expected'. Also, I tried
> >
> >
> > What about gap("2323")? Does that fail too? What about gap.eval("2323")?
> >
> >
> > > tab-completing something and then everything blew up.
> >
> > Don't try tab-completion. That part of the interface was written by
> > Steve Linton and William Stein and I think is highly non-trivial.
> >
> >
> > >
> > > Are you familiar with the differences in the two versions? Is there
> > > something simple you know of to try to fix this (besides your suggestion
> > > (4))? Or is the interface maybe just too incompatible with gap3? Or did
> I do
> > > something wrong in my installation/hack process?
> >
> >
> > I think you've made great progress but I'm at sagedays4 in Seattle now
> > and can't install gap 3 on my intel macbook to test any ideas.
> > Worst-comes-to-worst, I would ask Steve Linton (I'm ccing him)
> > for suggestions but maybe you basically have it except that your
> > pexpect interface needs a bit more tweeking.
> >
> >
> >
> >
> > >
> > > Thanks for your help. I'm guessing not too many people will want to be
> able
> > > to do this, so it's probably not a big deal/problem for sage.
> >
> > I am interested in this and would be very interested in detailed
> step-by-step
> > instructions on how to install Chevie in SAGE.
> >
> >
> > > -dorian
> > >
> > >
> > >
> > >
> > > On 6/11/07, David Joyner <[EMAIL PROTECTED]> wrote:
> > > >
> > > > Chevie is a GAP3 package, not GAP4. (Yes it matters.) To using
> > > > Chevie in SAGE I think you must do the following:
> > > >
> > > > (1) install GAP3 into SAGEHOME/local/lib (which may or may not
> > > > be possible on your machine - see Frank Luebeck's page for hints),
> > > > (2) install Chevie in GAP3,
> > > > (3) modify the gap.py pexpect module in the interfaces subdirectory
> > > > to call gap3 instead of gap4,
> > > > *or*
> > > > (4) translate all of Chevie from GAP3 to GAP4.
> > > >
> > > > Unfortunately, both options are non-trivial.
> > > >
> > > > +++++++++++++++++++++++++++++++++++++++++++
> > > >
> > > > On 6/11/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > Hello,
> > > > > I want to do some work with Braid groups. I see that there is a GAP
> > > > > package called CHEVIE which implements braid elements.
> > > > >
> > > > > I tried installing the CHEVIE package in GAP4, but failed (I'm new
> to
> > > > > GAP, so I can't really say what went wrong, but this package is
> > > > > advertised as a GAP3 package. Does that matter? Also, CHEVIE is not
> in
> > > > > the list of 'accepted packages' on the GAP webiste).
> > > > >
> > > > > I would like to be able to do my work with this in SAGE. Any advice
> on
> > > > > getting this package to work with GAP in SAGE, or, perhaps, any
> > > > > recommendation of another package supporting Braids would be
> > > > > appreciated.
> > > > >
> > > > > Thanks,
> > > > > -Dorian
> > > > >
> > > > >
> > > > > >
> > > > >
> > > >
> > > > > >
> > > >
> > >
> >
> > > >
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://www.williamstein.org
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