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Lie $\infty$-algebroids and singular foliations

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abstract

A singular (or Hermann) foliation on a smooth manifold $M$ can be seen as a subsheaf of the sheaf $\mathfrak{X}$ of vector fields on $M$. We show that if this singular foliation admits a resolution (in the sense of sheaves) consisting of sections of a graded vector bundle of finite type, then one can lift the Lie bracket of vector fields to a Lie $\infty$-algebroid structure on this resolution, that we call a universal Lie $\infty$-algebroid associated to the foliation. The name is justified because it is isomorphic (up to homotopy) to any other Lie $\infty$-algebroid structure built on any other resolution of the given singular foliation.

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math.DG 1

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2022 1

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On symmetries of singular foliations

math.DG · 2022-03-03 · unverdicted · novelty 7.0

Weak symmetry actions of Lie algebras on singular foliations induce unique-up-to-homotopy Lie∞-morphisms to the DGLA on the universal Lie∞-algebroid, with consequences including non-extendable actions and bi-submersion towers.

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  • On symmetries of singular foliations math.DG · 2022-03-03 · unverdicted · none · ref 22 · internal anchor

    Weak symmetry actions of Lie algebras on singular foliations induce unique-up-to-homotopy Lie∞-morphisms to the DGLA on the universal Lie∞-algebroid, with consequences including non-extendable actions and bi-submersion towers.