Kunneth formula for group homology

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Statement

For trivial group action

Suppose G1,G2 are groups and A is an abelian group. We have the following formula for the homology groups for trivial group action of G1×G2 on A in terms of the homology groups for trivial group action of G1 and G2 respectively on A:

Hn(G1×G2;A)≅(∑i+j=nHi(G1;A)⊗Hj(G2;A))⊕(∑p+q=n−1TorZ1(Hp(G1;A),Hq(G2;A))

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