Weak Poisson bracket conjecture for displaceable covers

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Let (M,ω)(M,\omega) be a symplectic manifold of dimension 2n2n, and let U\mathcal{U} be an open cover constituted of displaceable sets. For pb(U)pb(\mathcal{U}) as above and the symplectic volume Vol⁡(M,ω)\operatorname{Vol}(M,\omega), weak Poisson bracket conjecture. There exists a constant C>0C>0 depending only on (M,ω)(M,\omega) such that, for every such cover,

pb(U)Vol⁡(M,ω)1/n≥C.pb(\mathcal{U})\operatorname{Vol}(M,\omega)^{1/n}\geq C.

This weaker conjecture asserts that pb(U)pb(\mathcal{U}) is uniformly bounded away from zero on covers by displaceable sets. The source presents it as a related, simpler conjecture and explains that the stronger conjecture would virtually imply it when eH(U)e_H(\mathcal{U}) is sufficiently small.

References

Primary source

Jordan Payette, “The Poisson bracket invariant on surfaces”, arXiv:1803.09741 (2023).

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