Unboundedness conjecture for the contactomorphism-group metric dccd_{cc}

Let WW be the completion of a Liouville domain, and let Cont0,c(W×S1)\overline{\operatorname{Cont}}_{0,c}(W\times S^1) be the C0C^0-completion of the identity component of the group of compactly supported contactomorphisms of W×S1W\times S^1, equipped with the topology τC0\tau_{C^0}. Let dccd_{cc} denote the associated conjugation-invariant metric. Unboundedness conjecture. The metric dccd_{cc} is unbounded on (Cont0,c(W×S1),τC0)\bigl(\overline{\operatorname{Cont}}_{0,c}(W\times S^1),\tau_{C^0}\bigr). This conjecture would establish that the candidate spectral norm γAM\gamma_{AM} is genuinely unbounded and would extend the paper's results concerning conjugation-invariant norms on contactomorphism groups; its resolution is not supplied here.

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Primary source

Baptiste Serraille and Vukašin Stojisavljević, “On certain C^0-aspects of contactomorphism groups”, arXiv:2411.11422 (2024).

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