Mapping cylinder

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1	More Exercises for Algebraic Topology by Allen Hatcher Chapter[removed]Given a map f : X →Y , show that there exists a map g : Y →X with gf ≃ 11 iff X is a retract of the mapping cylinder Mf[removed]a) Suppose a CW co Add to Reading List Source URL: www.math.cornell.edu Language: English - Date: 2013-03-18 16:11:29 Mathematics Homotopy theory CW complex Fundamental group Homotopy group Mayer–Vietoris sequence Homotopy Singular homology Covering space Topology Abstract algebra Algebraic topology
2	PDF Document Add to Reading List Source URL: www.math.cornell.edu Language: English - Date: 2013-06-04 09:13:01 Homotopy theory Algebraic topology Topological spaces Deformation retract CW complex Adjunction space Homotopy Contractible space Mapping cylinder Topology Mathematics Space