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Aperiodic dynamical systems. (English) Zbl 0936.37039

This is a survey paper. The author introduces some nice theorems which describe interesting properties of the sphere through certain kinds of vector fields on it. The article is based on a lecture given by the author at the Joint Meeting in San Antonio in January 1999.

MSC:

37J45 Periodic, homoclinic and heteroclinic orbits; variational methods, degree-theoretic methods (MSC2010)
37K25 Relations of infinite-dimensional Hamiltonian and Lagrangian dynamical systems with topology, geometry and differential geometry
57R27 Controllability of vector fields on \(C^\infty\) and real-analytic manifolds
57R30 Foliations in differential topology; geometric theory
57R55 Differentiable structures in differential topology