Spherical multiple flags
Spherical multiple flags
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球形多旗
DOI：
10.2969/aspm/07110053
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
N. Perrin
中科院分区：
文献类型：
--
作者：
Piotr Achinger;N. Perrin
对于约化群G，用Stembridge方法分类了G下齐次的对G来说是球形的射影有理变种的积。我们考虑了这些球形变种的b轨道闭包，并证明在一些温和的限制下它们是正常的，Cohen-Macaulay和具有合理的分辨率。
For a reductive group G, the products of projective rational varieties homogeneous under G that are spherical for G have been classified by Stembridge. We consider the B-orbit closures in these spherical varieties and prove that under some mild restrictions they are normal, Cohen-Macaulay and have a rational resolution.