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arXiv 2104.09374math.CO
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交错欧拉多项式与左峰多项式

Alternating Eulerian polynomials and left peak polynomials

Shi-Mei Ma, Qi Fang, Toufik Mansour, Yeong-Nan Yeh

摘要:

本文给出了A型和B型交错欧拉多项式的语法解释。作为应用,我们得到了B型交错欧拉多项式的若干性质,包括组合展开式、递推关系和母函数。我们建立了B型交错欧拉多项式与对称群中置换左峰多项式之间的一个有趣的联系,这意味着B型交错欧拉多项式具有符号交错的伽玛向量.

英文摘要:

In this paper we present grammatical interpretations of the alternating Eulerian polynomials of types A and B. As applications, we derive several properties of the type B alternating Eulerian polynomials, including combinatorial expansions, recurrence relations and generating functions. We establish an interesting connection between alternating Eulerian polynomials of type B and left peak polynomials of permutations in the symmetric group, which implies that the type B alternating Eulerian polynomials have gamma-vectors alternate in sign.

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