Algebraic Topology · Problem 4.1.6
Homotopy Theory — Allen Hatcher
Mathematics — Topology · relative-homotopy-groups-covering-spaces
Problem
If p:(X~,A~,x~0)→(X,A,x0) is a covering space with A~=p−1(A), show that the map p∗:πn(X~,A~,x~0)→πn(X,A,x0) is an isomorphism for all n>1.
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