Polterovich's Poisson bracket conjecture for displaceable covers

Let (M,c9)(M,c9) be a symplectic manifold. For a positive collection F\mathcal{F}, let pb(F)pb(\mathcal{F}) denote its Poisson bracket invariant, and for an open cover U\mathcal{U} let pb(U)pb(\mathcal{U}) be the infimum of pb(F)pb(\mathcal{F}) over positive collections subordinate to U\mathcal{U}. Let eH(U)e_H(\mathcal{U}) denote the displacement energy of the cover. Poisson bracket conjecture. There exists a constant C>0C>0 depending only on (M,ω)(M,\omega) such that, for every open cover U\mathcal{U} constituted of displaceable sets,

pb(U)eH(U)C.pb(\mathcal{U})e_H(\mathcal{U})\geq C.

The conjecture asks for a uniform positive lower bound, independent of the displaceable cover, for the product of the Poisson bracket invariant and displacement energy. The source discusses it as an open conjecture and notes that a positive constant depending on the individual cover is already known.

Sources & referencesView supporting material

Primary source

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

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