Ah I see. Your group B is made using PcGroupAutPcGroup. This essentially
forgets that the group is an automorphism group and simply computes an
isomorphic PC Group ( at least for the soluble part). If you want to work with
the automorphisms as such, you either need to work directly in the
AutomorphismGroup, or keep track of the explicit isomorphism between that group
and a PC group.
Steve
From: Siddhartha Sarkar <siddharth...@gmail.com>
Date: Sunday, 23 February 2020 at 11:39
To: Stephen Linton <s...@st-andrews.ac.uk>
Cc: GAP Forum <forum@gap-system.org>
Subject: Re: Testing action of automorphisms on groups
Dear Stephen,
Thanks. It still shows an error.
Siddhartha
gap> p:=Image(a1,x1);
Error, usage: Image(<map>), Image(<map>,<elm>), Image(<map>,<coll>) at
/Users/sidhu/Desktop/GAP/gap-4.10.2/lib/mapping.gi:198<http://mapping.gi:198>
called from
<function "Image">( <arguments> )
called from read-eval loop at *stdin*:19
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk> return;
Error, Function call: <func> must return a value
not in any function at *stdin*:19
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