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arXiv · 2406.05204

Atiyah classes of Lie algebroid homotopy modules

Panagiotis Batakidis·Sylvain Lavau
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Abstract

For a Lie algebroid pair $A\hookrightarrow L$ we study cocycles constructed from the extension to $L$ of the higher connection forms of a representation up to homotopy $E$ of the Lie algebroid $A$. We show that there exists a cohomology class with values in the endomorphism bundle of $E$ that is independent of the extension above and vanishes whenever a homotopy $A$-compatible extension exists. Whenever the representation up to homotopy $E$ is the resolution of a Lie algebroid representation $K$ of $A$, it is shown that there exists a quasi-isomorphism sending the new Atiyah class to the classical one, associated to extensions to $L$ of the Lie algebroid representation $K$.

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Panagiotis Batakidis, Sylvain Lavau. 2024-06-07. Atiyah classes of Lie algebroid homotopy modules. https://arxiv.org/abs/2406.05204

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