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Alexander Polynomials of closed alternating braids

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arxiv 2310.14539 v1 pith:2IZB4OSI submitted 2023-10-23 math.GT math.CO

classification math.GTmath.CO
keywords alexanderalternatingbraidcoefficientspolynomialsbraidscertainclosed
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abstract

We prove that the Alexander polynomials of certain families of alternating 4-braid knots satisfy Fox's Trapezoidal Conjecture. Moreover, we give explicit formulas for the signature and for the first 4 coefficients of the Alexander polynomial for a large family of alternating $n$-braid links and we verify that these 4 coefficients form a log-concave sequence.

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