Smooth manifolds and their applications in homotopy theory
Л. C. Понтрягин, Гладкие многообразия и их применения в теории гомотопий, Москва, Наука, 1976. Translated by V.O.Manturov.
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+1 → Sk+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