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Group cohomology of Klein four-group

175 bytes added, 15:17, 21 July 2011
Cohomology ring with coefficients in integers
{{fillin}}
==Cohomology groups and cohomology ring with coefficients in integers==
===Groups over the integers=== The cohomology groups with coefficients in the integers are given as below: <math>H^p(\mathbb{Z}/2\mathbb{Z} \oplus \mathbb{Z}/2\mathbb{fillinZ};\mathbb{Z}) = </math>
==Second cohomology groups and extensions==
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