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arXiv · 2201.10507

Homological Lagrangian monodromy for some monotone tori

Marcin Augustynowicz·Jack Smith·Jakub Wornbard
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Abstract

Given a Lagrangian submanifold $L$ in a symplectic manifold $X$, the homological Lagrangian monodromy group $\mathcal{H}_L$ describes how Hamiltonian diffeomorphisms of $X$ preserving $L$ setwise act on $H_*(L)$. We begin a systematic study of this group when $L$ is a monotone Lagrangian $n$-torus. Among other things, we describe $\mathcal{H}_L$ completely when $L$ is a monotone toric fibre, make significant progress towards classifying the groups than can occur for $n=2$, and make a conjecture for general $n$. Our classification results rely crucially on arithmetic properties of Floer cohomology rings.

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Marcin Augustynowicz, Jack Smith, Jakub Wornbard. 2022-01-25. Homological Lagrangian monodromy for some monotone tori. https://arxiv.org/abs/2201.10507

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