The unbounded autonomous Hofer distance conjecture

Let XX be a closed symplectic manifold. Define

aut(X)=supϕHam(X,ω)dH(ϕ,Aut(X)),\operatorname{aut}(X)=\sup_{\phi\in \operatorname{Ham}(X,\omega)}d_H(\phi,\operatorname{Aut}(X)),

where dHd_H is Hofer's metric and Aut(X)\operatorname{Aut}(X) denotes the autonomous Hamiltonian diffeomorphisms. Unbounded autonomous Hofer distance conjecture. For every closed symplectic manifold XX,

aut(X)=+.\operatorname{aut}(X)=+\infty.

The conjecture predicts that autonomous Hamiltonian diffeomorphisms are unboundedly far from some Hamiltonian diffeomorphisms in Hofer's metric. The paper notes that this is known for products Σg×M\Sigma_g\times M under the hypotheses of the cited theorem, where Σg\Sigma_g is a closed oriented surface of genus g4g\geq 4 and MM is a closed symplectically aspherical manifold; the general case remains open.

Sources & referencesView supporting material

Primary source

Jun Zhang, “p-cyclic persistent homology and Hofer distance”, arXiv:1605.07594 (2021).

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