Nonabelian cohomology
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In mathematics, a nonabelian cohomology is any cohomology with coefficients in a nonabelian group, a sheaf of nonabelian groups or even in a topological space.
If homology is thought of as the abelianization of homotopy (cf. Hurewicz theorem), then the nonabelian cohomology may be thought of as a dual of homotopy groups.
Nonabelian Poincaré duality
Lua error in package.lua at line 80: module 'strict' not found. See: Nonabelian Poincare Duality (Lecture 8)
See also
References
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