287 research outputs found

    Jacobi Structures in R3\mathbb{R}^3

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    The most general Jacobi brackets in R3\mathbb{R}^3 are constructed after solving the equations imposed by the Jacobi identity. Two classes of Jacobi brackets were identified, according to the rank of the Jacobi structures. The associated Hamiltonian vector fields are also constructed

    Soins palliatifs : peut-on parler de qualité de vie en phase métastatique ?

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    Localized breast cancer : which baseline staging tests?

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    Follow-up of primary breast cancer : useful and useless

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    Integration of Dirac-Jacobi structures

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    We study precontact groupoids whose infinitesimal counterparts are Dirac-Jacobi structures. These geometric objects generalize contact groupoids. We also explain the relationship between precontact groupoids and homogeneous presymplectic groupoids. Finally, we present some examples of precontact groupoids.Comment: 10 pages. Brief changes in the introduction. References update

    Pas d’hormonothérapie pour quels cancers RH (+) ?

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    Breast cancer chemoprevention in 2008

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    Jacobi-Nijenhuis algebroids and their modular classes

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    Jacobi-Nijenhuis algebroids are defined as a natural generalization of Poisson-Nijenhuis algebroids, in the case where there exists a Nijenhuis operator on a Jacobi algebroid which is compatible with it. We study modular classes of Jacobi and Jacobi-Nijenhuis algebroids
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