Dear GAP folks:
Any help you can give me on this question would be appreciated. I'm
fairly new to using GAP, so the answer might be simple, but I've searched
a bit on the GAP site without finding an immediate answer. Forgive me if
this is trivial.
The automorphism group of a group G acts on the set S of subgroups of G.
Given a particular subgroup V of G, I would like to compute the size of
Aut(G)_V, that is, the stabilizer in Aut(G) of V.
I cannot figure out how to establish the proper action in this situation.
I think that I will need something like the ExternalSet command, because
this doesn't look like a commonly used action (based on what I've seen in
the manual). This seems like an easy computation though. Can anyone
help?
Thank you.
Ryan Higginbottom
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