Degenerate Arnol'd Conjecture on Lagrangian intersections
Prove that for a closed symplectic manifold (M, ω) and a Hamiltonian isotopic pair of Lagrangian submanifolds (L0, L1) where each Li is connected, closed, and satisfies ω|_{π2(M, Li)} = 0, the intersection cardinality satisfies |L0 ∩ L1| ≥ min{ |Crit(f)| : f ∈ C∞(Li) }, where Crit(f) denotes the set of critical points of f.
References
Conjecture [Degenerate Arnol'd Conjecture] Suppose M is closed and the pair (L_0,L_1) is Hamiltonian isotopic. Moreoever, suppose L_i is: connected, closed, and ω|_{π_2(M,L_i)}=0; then \begin{equation} {L_0\cap L_1}\geq\min\big{\crit(f)}:f\in C\infty(L_i)\big}, \end{equation} where \crit(f) is the set of critical points of f.
                — Parameterized Lagrangian Floer homotopy
                
                (2506.20122 - Blakey et al., 25 Jun 2025) in Section 1.1 (Lagrangian intersections)