[GAP Forum] Fw: help with permutation groups

[Steve Linton]

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Date: Sun, 19 Sep 2004 18:31:31 -0400
From: Ayan Mahalanobis <amahalan at fau.edu>
To: gap-forum at dcs.st-and.ac.uk
Subject: help with permutation groups


Hello all,
I need some help working with permutation group. I am working with the 
schreier-sims algorithm as implemented in GAP. I am usin StabChain to 
create a record for the group (as I understand it right now). Then say I 
want to create a random element of the group. I want to proceed in the 
folowing way, pick an random coset and then  a coset representative
of G_{i+1} in G_i for each i and multiply them.

Also suppose I have a element g of the group and I want to do a 
constructive membership testing, i.e. I want to find the word in stab 
chain representing g.

I think the information is there hiding in the record. Can some one 
please point me to the right direction.

Thanks in advance
Ayan


-- 
Steve Linton	School of Computer Science  &
      Centre for Interdisciplinary Research in Computational Algebra
	     University of St Andrews 	 Tel   +44 (1334) 463269
http://www.dcs.st-and.ac.uk/~sal	 Fax   +44 (1334) 463278