Skein algebras and quantized Coulomb branches for surfaces of genus at most one

Let S=Sg,nS=S_{g,n} be a surface of genus g1g\leq 1 with n>0n>0 boundary components, and let (G~,N)(\widetilde{G},N) be the group and representation associated to a pants decomposition of SS. Skein–Coulomb branch conjecture. If g=0g=0, there is a C\mathbb{C}-algebra isomorphism

SkA,λ(S)KG~OC(RG,N).\operatorname{Sk}_{A,\boldsymbol{\lambda}}(S)\cong K^{\widetilde{G}_{\mathcal{O}}\rtimes\mathbb{C}^*}(\mathcal{R}_{G,N}).

If g=1g=1, there is a Z2\mathbb{Z}_2-action on SkA,λ(S)\operatorname{Sk}_{A,\boldsymbol{\lambda}}(S) and a C\mathbb{C}-algebra isomorphism

SkA,λ(S)Z2KG~OC(RG,N).\operatorname{Sk}_{A,\boldsymbol{\lambda}}(S)^{\mathbb{Z}_2}\cong K^{\widetilde{G}_{\mathcal{O}}\rtimes\mathbb{C}^*}(\mathcal{R}_{G,N}).

This conjecture extends the stated isomorphisms for the four-holed sphere and one-holed torus to all surfaces with positive boundary and genus at most one, relating skein algebras to quantized Coulomb branches. The parser provides no evidence that the conjecture has been resolved.

Sources & referencesView supporting material

Primary source

Dylan G. L. Allegretti and Peng Shan, “Skein algebras and quantized Coulomb branches”, arXiv:2401.06737 (2024).

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