<Verb>HomToIntegralModule(R,A):: FreeResolution, GroupHomomorphism --> CochainComplex</Verb><P/>



<P/> Inputs a free <M>\mathbb ZG</M>-resolution <M>R</M> in characteristic <M>0</M>  
and a group homomorphism 
<M>A\colon G \rightarrow {\rm GL}_n(\mathbb Z)</M>. The homomorphism <M>A</M>
 can be viewed as the <M>\mathbb ZG</M>-module with underlying abelian group 
<M>\mathbb Z^n</M> on which <M>G</M> acts via the homomorphism <M>A</M>.
It returns the cochain complex <M>Hom_{\mathbb ZG}(R,A)</M>.




