Nonergodicity of Euler fluid dynamics on tori versus positivity of the Arnold-Ricci tensor |
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Authors: | Ana-Bela Cruzeiro Paul Malliavin |
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Institution: | a Dep. Matemática I.S.T., T.U.L.-Lisbon and Grupo de Física-Matemática U.L., Av. Rovisco Pais, 1049-001 Lisboa, Portugal b 10 rue S. Louis-en-l'Ile, 75004 Paris, France |
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Abstract: | Brownian motions above the group G of volume preserving diffeomorphisms of the torus Td, d?2, are constructed. The asymptotic behaviour for large time of those processes shows the nonexistence of a probability measure invariant under the deterministic incompressible fluid dynamics. The energy induces on the group of volume preserving diffeomorphisms of T2 a Riemannian structure which has a positive renormalized Ricci tensor. |
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Keywords: | Euler equation Nonergodicity of Euler dynamics Ricci tensor of diffeomorphisms group |
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