> < ^ Date: Wed, 21 Jun 2000 11:11:06 +0100 (BST)
> < ^ From: Derek Holt <dfh@maths.warwick.ac.uk >
^ Subject: cohomolo package

Dear GAP Forum,

There is now a GAP4 version of my share package 'cohomolo' that can be
downloaded from the GAP web-site http://www-gap.dcs.st-and.ac.uk/~gap.
This contains external binaries that run under UNIX only, and its
functionality is unchanged from the GAP3 version.

Derek Holt.

Here is the summary information:

Author: Derek F. Holt
Language: C
Operating System: Unix
Current version: 1.0 (for GAP 4.2)


The cohomology package defines functions which may be used to perform certain cohomological
calculations on a finite group G. These include:

1.The p-part P of the Schur multiplier of G, and a presentation of a covering
extension of P by G, for a specified prime p;

2.The dimensions of the first and second cohomology groups of G acting on a
finite dimensional KG module M, where K is a field of prime order; and

3.Presentations of split and nonsplit extensions of M by G.


Derek F. Holt

Mathematics Institute
University of Warwick
Warwick, Coventry, CV4 7A

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