Universal Tutte polynomial
Universal Tutte polynomial
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通用塔特多项式
DOI:
10.1016/j.aim.2022.108355
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发表时间:
2022
影响因子:
1.7
通讯作者:
Postnikov, Alexander
中科院分区:
文献类型:
--
作者:
Bernardi, Olivier;Kálmán, Tamás;Postnikov, Alexander
The Tutte polynomial is a well-studied invariant of graphs and matroids. We first extend the Tutte polynomial from graphs to hypergraphs, and more generally from matroids to polymatroids, as a two-variable polynomial. Our definition is related to previous works of Cameron and Fink and of Kálmán and Postnikov. We then define the universal Tutte polynomial T n, which is a polynomial of degree n in 2+(2 n− 1) variables that specializes to the Tutte polynomials of all polymatroids (hence all matroids) on a ground set with n elements. The universal polynomial T n admits three kinds of symmetries: translation invariance, S n-invariance, and duality.
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