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Article Dans Une Revue Symmetry, Integrability and Geometry : Methods and Applications Année : 2022

Relating stated skein algebras and internal skein algebras

Résumé

We give an explicit correspondence between stated skein algebras, which are defined via explicit relations on stated tangles in [Costantino F., Lê T.T.Q., arXiv:1907.11400], and internal skein algebras, which are defined as internal endomorphism algebras in free cocompletions of skein categories in [Ben-Zvi D., Brochier A., Jordan D., J. Topol. 11 (2018), 874-917, arXiv:1501.04652] or in [Gunningham S., Jordan D., Safronov P., arXiv:1908.05233]. Stated skein algebras are defined on surfaces with multiple boundary edges and we generalise internal skein algebras in this context. Now, one needs to distinguish between left and right boundary edges, and we explain this phenomenon on stated skein algebras using a half-twist. We prove excision properties of multi-edges internal skein algebras using excision properties of skein categories, and agreeing with excision properties of stated skein algebras when V=Uq2(sl2)-modfin. Our proofs are mostly based on skein theory and we do not require the reader to be familiar with the formalism of higher categories.
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hal-04083079 , version 1 (26-04-2023)

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Benjamin Haïoun. Relating stated skein algebras and internal skein algebras. Symmetry, Integrability and Geometry : Methods and Applications, 2022, 18 (42), ⟨10.3842/SIGMA.2022.042⟩. ⟨hal-04083079⟩
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