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arxiv: 2409.03557 · v6 · pith:ABAOSJTOnew · submitted 2024-09-05 · 🧮 math.GT · hep-th

Patterns of the V₂-polynomial of knots

classification 🧮 math.GT hep-th
keywords polynomialknotspolynomialsalgebrafirsthomologyleadsnichols
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Recently, Kashaev and the first author constructed an $R$-matrix from a Nichols algebra with an automorphism, that leads, via the Reshetikhin--Turaev functor, to a multivariable polynomial invariant of knots. Applying this to a rank 2 Nichols algebra, results in a sequence $V_n$ of 2-variable knot polynomials with integer coefficients, the first polynomial been identified with the Links--Gould polynomial. In this note we present the results of the computation of the $V_n$-polynomials for $n=1,2,3,4$. This leads to the discovery of emerging patterns, including the genus bound for $V_2$ being an equality for all 352.2 million knots with at most $19$ crossings, as well as unexpected Conway mutations that seem undetected by the $V_n$-polynomials as well as by Heegaard Floer Homology and Khovanov Homology.

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Cited by 2 Pith papers

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  1. Positivity and log concavity of the Links--Gould polynomial of knots

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    Formulates positivity, hole-free, and log-concavity conjecture for Links-Gould polynomial of alternating links and verifies it on all 51.3 million alternating knots with ≤19 crossings.

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    A fast polynomial-time knot invariant pair (Δ, θ) with superior distinguishing power on small knots, a genus bound, and simpler formulas for a previously studied quantity.