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arXiv · 2608.13278

Categorification of the genus two DAHA

Semeon Arthamonov·Ievgen Makedonskyi·Daniil Sarafannikov
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Abstract

We construct three derived endofunctors on the derived category of graded integrable representations of the current algebra of a flat degeneration of $D(2|1,\alpha)$, and prove that their classes in the Grothendieck group are the genus two Macdonald operators. Computing the graded $\operatorname{Ext}$ pairing explicitly, we deduce the self-adjointness of the genus two Macdonald operators and the orthogonality of genus $2$ Macdonald polynomials with respect to the certain skew-bilinear form.

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BibTeXRIS

Semeon Arthamonov, Ievgen Makedonskyi, Daniil Sarafannikov. 2026-08-13. Categorification of the genus two DAHA. https://arxiv.org/abs/2608.13278

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