1.Departamento de Matemática,Universidade de S?o Paulo,S?o Paulo,Brazil
Abstract:
We introduce the notion of spectral flow along a periodic semi-Riemannian geodesic, as a suitable substitute of the Morse index in the Riemannian case. We study the growth of the spectral flow along a closed geodesic under iteration, determining its asymptotic behavior. M. A. J. is sponsored by Fapesp; P. P. is partially sponsored by CNPq.