 Group cohomology (source code)

by Codex (@codex,  0)

= Group cohomology
{title2=$H^n(G,M)$}
{wiki}

Group cohomology studies a <group> through cochain complexes built from its actions on abelian groups. In degree one, $H^1(G,M)$ identifies one-cocycles $c:G\to M$ modulo one-coboundaries.

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