Spinors and essential dimension

Spinors and essential dimension
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旋量和基本维度

DOI:
--
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发表时间:
2016
影响因子:
1.8
通讯作者:
R. Guralnick
R. Guralnick
中科院分区:
数学1区
文献类型:
--
作者:
S. Garibaldi;R. Guralnick

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我们证明了自旋群在群方案的意义上,以一种不依赖于基场特征的方式,自由地作用于各种自旋模上。因此,我们推广了由Brosnan等人对特征零点处自旋群和半自旋群的本质维数的惊人计算[本质维数,自旋群,和二次型,Ann。]的数学。(2) 171(2010), 533-544]和Chernousov和Merkurjev[旋量和Clifford群的基本维数,代数数论8(2014),457-472]的特征域不同于两个。我们还完成了低秩自旋和半自旋基团中一般稳定剂的确定。
We prove that spin groups act generically freely on various spinor modules, in the sense of group schemes and in a way that does not depend on the characteristic of the base field. As a consequence, we extend the surprising calculation of the essential dimension of spin groups and half-spin groups in characteristic zero by Brosnan et al. [Essential dimension, spinor groups, and quadratic forms, Ann. of Math. (2) 171 (2010), 533–544], and Chernousov and Merkurjev [Essential dimension of spinor and Clifford groups, Algebra Number Theory 8 (2014), 457–472] to fields of characteristic different from two. We also complete the determination of generic stabilizers in spin and half-spin groups of low rank.
简单代数群和李代数中的单能类和幂零类
DOI: --
发表时间: 2012
期刊: --
影响因子: --
作者:
Liebeck, Martin W.;Seitz, Gary M.
通讯作者: Seitz, Gary M.
基本维数和规范维数的纤维维数定理
DOI: 10.1112/s0010437x12000565
发表时间: 2013
影响因子: 1.8
作者:
R. Lötscher
通讯作者: R. Lötscher