> < ^ Date: Mon, 30 Oct 2000 13:11:24 -0700
> < ^ From: Nicolas Thiery <nthiery@icare.mines.edu >
> < ^ Subject: Re: invariants of permutation groups

--LXx4g46d83wF7unj
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Dear Gap forum,

Maybe someone in this list can help me: is there any software
available to compute invariant of permutation groups?

I guess I can do this :-) This is not directly related to GAP, but
since some persons on the GAP mailing list may be interested, I allow
myself to forward below the announcement for PerMuVAR 0.999.1.

By the way, I am planning to organize an informal workshop in France
at the end of next spring about computational aspects of invariants of
permutation groups (see http://permuvar.sourceforge.net/ for details).

Here are some other invariant theory packages, which work in the
general case of groups of matrices, but are not optimized for
permutation groups:

- package Invar for maple by G. Kemper
http://www.iwr.uni-heidelberg.de/~Gregor.Kemper/invar.html
- package Invar in magma by A. Steel & G. Kemper
http://www.maths.usyd.edu.au:8000/u/magma/htmlhelp/text718.html
- biblioth=E8que Finvar pour Singular by Heydtmann
- biblioth=E8que SYMMETRY by Gatermann:
http://www.zib.de/gatermann/symmetry.html#symmetry}

Have a nice week,
Nicolas

```---------------------------------------------------------------------------=
---
I am really pleased to announce the release of PerMuVAR 0.999.1
```

PerMuVAR is an open source library for the computer algebra system
MuPAD for computations in invariant rings of permutation groups. Its
main features are: computation of Hilbert series, Hironaka
decompositions, and minimal generating sets.

http://permuvar.sourceforge.net/

This is a one time announcement. If you want to receive further
notices of releases of PerMuVAR, please subscribe to the mailing list:

http://lists.sourceforge.net/mailman/listinfo/permuvar-announce =20

```Note that I am thinking about porting PerMuVAR to GAP some day.
---------------------------------------------------------------------------=
---

--=20
Nicolas M. Thi=E9ry "Isil", 412 Washington Avenue, 80403 Golden Colorado (U=
SA)
M=E9l: nthiery@mines.edu, T=E9l: (303)273-5492, Fax: (303)273-3875
WWW: <URL:http://www.mines.edu/~nthiery/>
```

--LXx4g46d83wF7unj
Content-Type: application/pgp-signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.1 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE5/dXr6iQOIqkrTMQRAmR6AJ91G8u6hqQ6gmUqZg1pTMvuTIhpBACfUKS1
wnwBKGBBuo5OSco8retm9x8=
=RfEE
-----END PGP SIGNATURE-----

```--LXx4g46d83wF7unj--
```

> < [top]