aspherical space

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aspherical space

Definition: An aspherical space X is anything of the homotopy type K(π1X,1), i.e. πk(X)=0 for k2.

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  • group cohomology

    If X is an aspherical space, then Hksing(X;F)HkGrp(π1X;Fx) where F is a local system.

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