Spinors and essential dimension
Spinors and essential dimension
复制标题
旋量和基本维度
作者:
S. Garibaldi;R. Guralnick
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.
DOI:
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发表时间:
2012
期刊:
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影响因子:
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作者:
Liebeck, Martin W.;Seitz, Gary M.
通讯作者:
Seitz, Gary M.
影响因子:
1.8
作者:
R. Lötscher
通讯作者:
R. Lötscher