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On Frobenius algebras obtained from stated skein algebras

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arxiv 2310.13116 v1 pith:XDOIREJD submitted 2023-10-19 math.GT

On Frobenius algebras obtained from stated skein algebras

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keywords algebraskeinstatedfrobeniusalgebrasfieldfractionfractions
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When the quantum parameter $q^{\frac{1}{2}}$ is a root of unity of odd order and the punctured bordered surface has nonempty boundary, we prove the fraction ring of the stated skein algebra (that is the localization over all nonzero elements) is a symmetric Frobenius algebra over both the field of fractions of the image of the Frobenius map and the field of fractions of the center of the stated skein algebra. We also calculate Traces of the fraction ring of the stated skein algebra over these two fields.

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  1. Quantum cluster algebra realization for stated ${\rm SL}_n$-skein algebras and rotation-invariant bases for polygons

    math.QA 2026-05 unverdicted novelty 6.0

    For polygonal surfaces, the localized stated SL_n-skein algebra equals the associated quantum cluster algebra, producing a rotation-invariant basis.