arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.03681math.CO
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符号置换群与偶符号置换群的Worpitzky恒等式

The Worpitzky identity for the groups of signed and even-signed permutations

Eli Bagno, David Garber, Mordechai Novick

摘要:

著名的Worpitzky恒等式提供了$\mathbb{Q}[x]$的两个基之间的联系:标准基$(x+1)^n$和二项式基${{x+n-i} \choose {n}}$,其中$A$类型的Coxeter群(对称群)的欧拉数作为变换矩阵的元素。Brenti利用生成函数技术将这个恒等式推广到了类型为$B$和$D$(分别为带符号和偶符号置换群)的Coxeter群。受Foata-Schützenberger和Rawlings在对称群中证明Worpitzky恒等式的启发,我们给出了这个恒等式及其在类型为$B$和$D$的Coxeter群中的$q-$类似物的组合证明.

英文摘要:

The well-known Worpitzky identity provides a connection between two bases of $\mathbb{Q}[x]$: The standard basis $(x+1)^n$ and the binomial basis ${{x+n-i} \choose {n}}$, where the Eulerian numbers for the Coxeter group of type $A$ (the symmetric group) serve as the entries of the transformation matrix. Brenti has generalized this identity to the Coxeter groups of types $B$ and $D$ (signed and even-signed permutations groups, respectively) using generating function techniques. Motivated by Foata-Schützenberger and Rawlings' proof for the Worpitzky identity in the symmetric group, we provide combinatorial proofs of this identity and for their $q-$analogues in the Coxeter groups of types $B$ and $D$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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