2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62770An introduction to circle valued Morse theory and Novikov homology, from an algebraic point of view.26 pages. Notes of lecture given at the Summer School on High-dimensional Manifold Topology, ICTP Trieste, May-June 2001. To appear in Vol. 1 of the ProceedingsAlgebraic TopologyDifferential Geometry57R70;55U15text