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arXiv 0901.1052math.AC
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Doset Hibi环及其在不变量理论中的应用

Doset Hibi rings with an application to invariant theory

Mitsuhiro Miyazaki

摘要:

定义了doset Hibi环和广义doset Hibi环的概念,它们是Hibi环的子环,是正规仿射半群.本文应用(广义)doset Hibi环的理论分析了绝对正交不变量环和绝对特殊正交不变量环,证明了当基域的特征为零时,这些环是正规的,Cohen-Macaulay环,并且具有有理奇异性,否则是F-有理环.给出了这类环的Gorenstein性质的判别准则。

英文摘要:

We define the concept of a doset Hibi ring and a generalized doset Hibi ring which are subrings of a Hibi ring and are normal affine semigrouprings. We apply the theory of (generalized) doset Hibi rings to analyze the rings of absolute orthogonal invariants and absolute special orthogonal invariants and show that these rings are normal and Cohen-Macaulay and has rational singularities if the characteristic of the base field is zero and is F-rational otherwise. We also state criteria of Gorenstein property of these rings.

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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