Dear GAP forum,

I have a calculation that I want to carry out (repeatedly with the data varying) without running into memory difficulties.

Let S_n denote the symmmetric group on {1,...,n}. I have subgroups H <= K <= S_n; these subgroups are defined by (small) generating sets. I have an element g in S_n. When subgroups of S_n act on S_n by conjugation, the K-orbit containing g is partitioned into H-orbits. I'd like to find representatives for these H-orbits (ideally, the representatives which are smallest in the usual GAP order for permutations). In practice, K is so large that computing the whole of the K-orbit containing g exceeds the available memory.

Does anyone have any idea how I can accomplish this?

Best wishes,
Matt Fayers.

_______________________________________________________________
Matthew Fayers
School of Mathematics
Queen Mary University of London
Mile End Road
London
E1 4NS
020 7882 5479

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