Dear GAP-forum,

Frank Celler wrote,

If you need that isomorphism explicitly then you have to implement Derek's
algorithm,

Just to save probably a few days work: I have written an implementation of
this algorithm (which is to be added for future versions of GAP).
If anyone is interested in it, I'll try to put it on our ftp server.

Alexander Hulpke

-- Alexander Hulpke , |Ce po`eme est, en effet, divis'e en
Concordia University, Montreal, Canada|cinq strophes successivement et respec-
hulpke@abacus.concordia.ca |tivement compos'ees de 3-1-4-1-5 vers,
ahulpke@bert.math.rwth-aachen.de | Jacques Bens: Le sonnet irrationnel