Singular components of the Springer fiber in the two-columns case
Singular components of the Springer fiber in the two-columns case
复制标题
两柱情况下施普林格纤维的单一成分
DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
Lucas Fresse
中科院分区:
文献类型:
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作者:
Lucas Fresse
We consider the Springer fiber ${\mathcal B}_u$ corresponding to a nilpotent endomorphism $u$ of nilpotent order 2. As a first result, we give a description of the elements of a given component of ${\mathcal B}_u$ which are fixed by the action of the standard torus relative to some Jordan basis of $u$. By using this result, we establish a necessary and sufficient condition of singularity for the components of ${\mathcal B}_u$.