Arnold-type cuplength conjecture for Lagrangian intersections

Let (X,ω)(X,\omega) be a symplectic manifold, and let LL and LL' be Lagrangian submanifolds of XX. Assume that XX is either closed or a Liouville manifold, and that LL is connected, closed, and relatively exact, meaning

ωπ2(X,L)=0.\omega\cdot\pi_2(X,L)=0.

Write Crit(L)\mathrm{Crit}(L) for the minimal number of critical points of any smooth map LRL\to\mathbb{R}. Arnold-type Lagrangian intersection conjecture. There is a lower bound

#(LL)Crit(L).\#(L\cap L')\geq \mathrm{Crit}(L).

This is a nontransverse version of the Arnold conjecture for Lagrangian intersections. The transverse case admits lower bounds from Floer homology, while the stated bound is formulated under relative exactness to exclude disc and sphere bubbling.

Sources & referencesView supporting material

Primary source

Amanda Hirschi and Noah Porcelli, “Lagrangian intersections and cuplength in generalised cohomology theories”, arXiv:2211.07559 (2024).

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