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arXiv math-ph/0212020math-phmath.MP
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Clifford代数的Z_2-分次与多向量结构

Z_2-gradings of Clifford algebras and multivector structures

Ricardo A. Mosna, David Miralles, Jayme Vaz

摘要:

设Cl(V,g)是与实向量空间V相关联的实Clifford代数,赋予它一个非退化度量g.本文研究了Cl(V,g)中与V上Grassmann代数的多向量结构相容的Z_2-分次类,通过对这类Z_2-分次的偶子代数进行分类,得到了这类Z_2-分次的一个完全刻画。还得到了这样的子代数与Cl(V,g)的通常偶部分的关系表达式。最后,我们利用这个框架定义了旋量空间,并通过这个代数的Z_2-分次来参数化Cl(V,g)上所有可能的签名变化。

英文摘要:

Let Cl(V,g) be the real Clifford algebra associated to the real vector space V, endowed with a nondegenerate metric g. In this paper, we study the class of Z_2-gradings of Cl(V,g) which are somehow compatible with the multivector structure of the Grassmann algebra over V. A complete characterization for such Z_2-gradings is obtained by classifying all the even subalgebras coming from them. An expression relating such subalgebras to the usual even part of Cl(V,g) is also obtained. Finally, we employ this framework to define spinor spaces, and to parametrize all the possible signature changes on Cl(V,g) by Z_2-gradings of this algebra.

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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