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Abstract:

The following sections are included:

  • Introduction

  • Chapter I. Smooth manifolds and their maps

    • Smooth manifolds

    • Embedding of a manifold into Euclidean space

    • Nonproper points of smooth maps

    • Non-degenerate singular points of smooth mappings

  • Chapter II. Framed manifolds

    • Smooth approximations of continuous mappings and deformations

    • The basic method

    • Homology group of framed manifolds

    • The suspension operation

  • Chapter III. The Hopf invariant

    • Homotopy classification of mappings of n-manifolds to the n-sphere

    • The Hopf invariant of mappings Σ2k+1Sk+1

    • Framed manifolds with Hopf invariant equal to zero

  • Chapter IV. Classification of mappings Sn+2 → Sn

    • The Euclidean space rotation group

    • Classification of mappings Σ3 → S2

    • Classification of mappings from (n + 1)-sphere to n-sphere

    • Classification of mappings Σ(n+2) → Sn

  • References

Л. C. Понтрягин, Гладкие многообразия и их применения в теории гомотопий, Москва, Наука, 1976. Translated by V.O.Manturov.