I am a student of mathematics who has difficulties with GAP 4. I unfortunately don't know how to do the following things:
1) I wish to compute the Heller module of the trivial module in the Kleinian Four Group
2) I'd like to enter a module in GAP when some matrices which reflect the group elements' actions are given (e.g. like in exercise 13 on page 24 (31 of 109) of Benson's paper http://arxiv.org/PS_cache/arxiv/pdf/1107/1107.4815v1.pdf)
3) I want to calculate with an algebraic closure of F_p in GAP - is there a way to implement this?
I would be very grateful for any help.