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arXiv · 2405.10161

Torus knots and generalized Schr\"oder paths

Marko Stošić·Piotr Sułkowski
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Abstract

We relate invariants of torus knots to the counts of a class of lattice paths, which we call generalized Schr\"oder paths. We determine generating functions of such paths, located in a region determined by a type of a torus knot under consideration, and show that they encode colored HOMFLY-PT polynomials of this knot. The generators of uncolored HOMFLY-PT homology correspond to a basic set of such paths. Invoking the knots-quivers correspondence, we express generating functions of such paths as quiver generating series, and also relate them to quadruply-graded knot homology. Furthermore, we determine corresponding A-polynomials, which provide algebraic equations and recursion relations for generating functions of generalized Schr\"oder paths. The lattice paths of our interest explicitly enumerate BPS states associated to knots via brane constructions.

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Marko Stošić, Piotr Sułkowski. 2024-05-16. Torus knots and generalized Schr\"oder paths. https://arxiv.org/abs/2405.10161

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