This elegant book by distinguished mathematician John Milnor, provides a
clear and succinct introduction to one of the most important subjects in
modern mathematics. Beginning with basic concepts such as
diffeomorphisms and smooth manifolds, he goes on to examine tangent
spaces, oriented manifolds, and vector fields. Key concepts such as
homotopy, the index number of a map, and the Pontryagin construction are
discussed. The author presents proofs of Sard's theorem and the Hopf
theorem.