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Nous étudions des analogues en dimension supérieure de l’inégalité de Burago , avec une surface fermée de classe immergée dans , son
aire et sa courbure totale. Nous donnons un exemple explicite qui prouve qu’une
inégalité analogue de la forme , avec une
constante, ne peut être vraie pour une hypersurface fermée de classe dans
, . Nous mettons toutefois en évidence une condition suffisante
sur la courbure de Ricci sous laquelle l’inégalité est vérifiée en dimension . En
dimension...
We study the parametrized Hamiltonian action functional for finite-dimensional families of Hamiltonians. We show that the linearized operator for the -gradient lines is Fredholm and
surjective, for a generic choice of Hamiltonian and almost complex structure. We also establish the Fredholm property and transversality for generic -invariant families of Hamiltonians and almost complex structures, parametrized by odd-dimensional spheres. This is a foundational result
used to define -equivariant...
The first two authors have recently defined Rabinowitz Floer homology groups associated to a separating exact embedding of a contact manifold into a symplectic manifold . These depend only on the bounded component of . We construct a long exact sequence in which symplectic cohomology of maps to symplectic homology of , which in turn maps to Rabinowitz Floer homology , which then maps to symplectic cohomology of . We compute , where is the unit cosphere bundle of a closed manifold...
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