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Symplectic twist maps without conjugate points

M. L. Bialy, R. S. MacKay

math.SGarXiv:math/0309470

Abstract

We consider a sequences of symplectic twist maps corresponding to Frenkel Kontorova variational functional. For such a sequence without conjugate points we construct an invariant Lagrangian subbundle. Using the ideas by E.Hopf from Riemannian geometry we show that absence of conjugate points is a rare property for this class of maps.

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