[GAP Forum] Matrix group

Petra Holmes holmespe at for.mat.bham.ac.uk
Fri Aug 13 13:12:57 BST 2004


On Fri, 13 Aug 2004, Nicola SOTTOCORNOLA wrote:

> This group has a normal subgroup H of size 16.
> H:=MaximalNormalSubgroups(G);                                                       
> [ <group of 5x5 matrices of size 16 in characteristic 0> ]
The output from this looks like a list of length 1, where the element H[1]

> I'd like to study the structure of H. Why I obtain the following error msg?
> gap> P := PresentationViaCosetTable(H);;
> Error, first argument must be a group 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
> brk> 
You have given it a list, not a group.  Try


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