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On matroid modularity and the coefficients of the inverse Kazhdan-Lusztig polynomial of a matroid

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arxiv 2103.08580 v4 pith:OHUOW3PE submitted 2021-03-15 math.CO

classification math.CO
keywords matroidinversekazhdan-lusztigmatroidspolynomialconjecturemodularregular
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Following the work of Gao and Xie in [2], we state some properties of the inverse Kazhdan-Lusztig polynomial of a matroid. We also give partial answers to a conjecture that states that regular connected matroids are non-degenerate. We link the degeneracy of a matroid to the inverse Kazhdan-Lusztig polynomial and we show that the Conjecture holds for modular matroids, by proving that degenerate modular matroids are not regular.

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  1. Log-concavity of inverse Kazhdan-Lusztig polynomials of paving matroids

    math.CO 2025-04 conditional novelty 6.0 of 10

    The inverse Kazhdan-Lusztig polynomials of paving matroids are log-concave, proved via a new real-rootedness result for a Hadamard product with (1+t)^n.

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