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arXiv 0812.3105math.GRmath.CO
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有限约化幺半群的阶

Orders of Finite Reductive Monoids

Zhuo Li, Zhenheng Li, You'an Cao

摘要:

我们给出了四个计算含零的有限约化幺半群的阶的公式。作为应用,这些公式被用来计算由$F_q$ -分裂$\J$ -不可约幺半群$\overline {K^*ρ(G_0)}$导出的有限约化幺半群的阶,其中$G_0$是$F_q$的代数闭包上的一个单代数群,而$ρ: G_0\to GL(V)$是与任意支配权相关的不可约表示.最后,我们给出了有限辛幺半群的阶的显式公式与最后基本支配权的类型$C_l$ ;连接到$H$ -多项式和Betti数。

英文摘要:

We show four formulas for calculating the orders of finite reductive monoids with zero. As applications, these formulas are then used to calculate the orders of finite reductive monoids induced from the $F_q$-split $\J$-irreducible monoids $\overline {K^*ρ(G_0)}$ where $G_0$ is a simple algebraic group over the algebraic closure of $F_q$, and $ρ: G_0\to GL(V)$ is the irreducible representation associated with any dominant weight. Finally, we give an explicit formula for the orders of finite symplectic monoids associated with the last fundamental dominant weight of type $C_l$; the connections to $H$-polynomials and Betti numbers are shown.

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