Eulerian representations for real reflection groups
Eulerian representations for real reflection groups
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实反射群的欧拉表示
DOI:
10.1112/jlms.12519
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Brauner, Sarah
中科院分区:
文献类型:
--
作者:
Brauner, Sarah
The Eulerian idempotents, first introduced for the symmetric group and later extended to all reflection groups, generate a family of representations called the Eulerian representations that decompose the regular representation. In Type A$A$, the Eulerian representations have many elegant but mysterious connections to rings naturally associated with the braid arrangement. Here, we unify these results and show that they hold for any reflection group ofcoincidental type— that is, Sn$S_{n}$, Bn$B_{n}$, H3$H_{3}$ or the dihedral group I2(m)$I_{2}(m)$ — by giving six characterizations of the Eulerian representations, including as components of the associated graded Varchenko–Gelfand ring V$\mathcal {V}$. As a consequence, we show that Solomon's descent algebra contains a commutative subalgebra generated by sums of elements with a fixed number of descents if and only if W$W$ is coincidental. More generally, for any finite real reflection group, we give a case‐free construction of a family of Eulerian representations described by a flat decomposition of the ring V$\mathcal {V}$.
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影响因子:
1.4
作者:
G. Ziegler;R. Živaljević
通讯作者:
R. Živaljević
影响因子:
0.4
作者:
A. Varchenko;I. Gel'fand
通讯作者:
I. Gel'fand
影响因子:
1.3
作者:
S. Sundaram;V. Welker
通讯作者:
V. Welker
影响因子:
0.5
作者:
P. Abramenko
通讯作者:
P. Abramenko
DOI:
10.1090/memo/1072
发表时间:
2011
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
V. Reiner;Franco V. Saliola;V. Welker
通讯作者:
V. Welker