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    Describe the cokernels of the n-by-n matrices

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    Describe the cokernels of the n-by-n matrices An and Bn as abelian group. Recall that the cokernel of an n-by-n matrix Nn equals Zn=NnZn and has another interpretation for certain graphs.

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    In this solution we describe the cokernels of the n-by-n matrices An and Bn as abelian group.

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