October 16, 1997. A joint meeting with the St.Petersburg Mathematical Society.
V.I.Arnold (Moscow). Topological questions of wave propagation.

The topic of the report is applications of the Sturm--Gurwitz theorem on zeroes of Fourier series to simplectic topology, to the Morse theory of multi-valued functions, and to generalizations of the Moebius theorem on points of inflection.

List of talks at previous sessions of the seminar.