Circle-valued Morse theory - Pajitnov, Andrei V. (de Gruyter, 2006)
Includes bibliographical references (p. [437]-444) and index
In 1927, M Morse discovered that the number of critical points of a smooth function on a manifold is closely related to the topology of the manifold. This became a starting point of the Morse theory. This book aims to give a systematic treatment of the geometric foundations of a subfield of that topic, the circle-valued Morse functions