A necessary and sufficient condition for a vector field to be Killing.
Sobre inmersiones isométricas de variedades rienmmannianas en espacios euclideos.
Lagrangian holonomy ; characteristic elements of a lagrangian foliation
Let be a lagrangian foliation on a symplectic manifold . The characteristic elements of such a foliation associated to a lagrangian total transversal are obtained; they are a generalisation of the characteristic elements given by J.J. Duistermaat [5]. This technique is applied to give a classification of the germs of lagrangian foliation along a compact leaf. Several examples of classification are given.
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