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arXiv · 2508.05605

Annular SL(2) and SL(3) web algebras

Rostislav Akhmechet·Mikhail Khovanov·Melissa Zhang
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Abstract

We use annular foam TQFTs introduced by the first two authors to define equivariant $SL(2)$ and $SL(3)$ web algebras in the annulus. To a diagram of a tangle in the thickened annulus we assign a complex of bimodules over these algebras whose chain homotopy type is an invariant of the tangle. Several properties of algebras and bimodules are established. An essential technical part of the paper provides a bijective correspondence between non-elliptic annular $SL(3)$ webs and closed paths in the $SL(3)$ weight lattice. This generalizes an analogous bijection in the planar setting.

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Rostislav Akhmechet, Mikhail Khovanov, Melissa Zhang. 2025-08-07. Annular SL(2) and SL(3) web algebras. https://arxiv.org/abs/2508.05605

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