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Groups of Homotopy Spheres: I

1963/05/01 by Michel Kervaire, John Milnor · 12 citations
Mathematics · #Advanced Combinatorial Mathematics #Algebraic structures and combinatorial models #Astronomy #Bott periodicity theorem #Homotopy #Homotopy and Cohomology in Algebraic Topology #Homotopy group #Homotopy sphere #Mathematics #Pure mathematics #SPHERES

paper · doi:10.2307/1970128

openalex publication_date 1963/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/18

Abstract

DEFINITION. Two closed n-manifolds M, and M2 are h-cobordant1 if the disjoint sum M, + (- M2) is the boundary of some manifold W, where both M1 and (-M2) are deformation retracts of W. It is clear that this is an equivalence relation. The connected sum of two connected n-manifolds is obtained by removing a small n-cell from each, and then pasting together the resulting boundaries. Details will be given in ? 2.

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