Conjecture on morphisms from punctured-surface homeomorphism groups

Let SS be a closed surface, let DD be an open disc in SS, and write SDS-D for the surface obtained by removing DD. Let Homeo0(SD)\mathrm{Homeo}_{0}(S-D) be the identity component of the group of homeomorphisms of SDS-D whose support is contained in the interior of SDS-D. The punctured-surface morphism conjecture. Every group morphism

Homeo0(SD)Homeo0(S)\mathrm{Homeo}_{0}(S-D)\longrightarrow\mathrm{Homeo}_{0}(S)

is induced by an inclusion of SDS-D in SS. The conjecture concerns the rigidity of morphisms between homeomorphism groups of surfaces and is presented as an attainable problem; no resolution is given in the source.

Sources & referencesView supporting material

Primary source

Emmanuel Militon, “Actions of the group of homeomorphisms of the circle on surfaces”, arXiv:1211.0846 (2014).

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