[GAP Forum] Problem with ComplementClasses

[Benjamin Sambale]

Just write "Complementclasses" instead of "ComplementClasses".


Kasper Andersen schrieb:
> Hi!
>
> As a test for a more serious application I want to use GAP to find the 
> conjugacy classes of complements of the normal subgroup A_4/V_4 in 
> S_4/V_4. The following piece of code sets up the quotient S_4/V_4 and 
> the normal subgroup A_4/V_4:
>
> S4:=SymmetricGroup(4);
> A4:=DerivedSubgroup(S4);
> V4:=DerivedSubgroup(A4);
> pi:=NaturalHomomorphismByNormalSubgroup(S4,V4);
> S4modV4:=Image(pi,S4);
> A4modV4:=Image(pi,A4);
>
> After this the result should be obtainable by
>
> ComplementClasses(S4modV4,A4modV4)
>
> but this gives the error
>
> Error, no method found! For debugging hints type ?Recovery from 
> NoMethodFound
> Error, no 1st choice method found for `PcpsOfEfaSeries' on 1 arguments 
> called \
> from
> PcpsOfEfaSeries( N ) called from
> <function>( <arguments> ) called from read-eval-loop
> Entering break read-eval-print loop ...
> you can 'quit;' to quit to outer loop, or
> you can 'return;' to continue
>
> on my system. Why does this happen? Is there an easy way to solve it?
>
> thanks in advance,
>
> Kasper Andersen
>
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