<Verb>LHSSpectralSequence(G,N,r):: Group, Int, Int --> List</Verb><P/>

Inputs a finite <M>2</M>-group <M>G</M>, and normal subgroup <M>N</M> and an 
integer <M>r</M>.
It returns a list of length <M>r</M>
whose <M>i</M>-th term is a presentation for the <M>i</M>-th page of the Lyndon-Hochschild-Serre spectral sequence.

This function was written by Paul Smith. It uses the Singular commutative algebra package.

