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arXiv:1908.04768 [math.AG]AbstractReferencesReviewsResources

Parabolic subgroups and Automorphism groups of Schubert varieties

S. Senthamarai Kannan, Pinakinath Saha

Published 2019-08-13Version 1

Let $G$ be a simple algebraic group of adjoint type over the field $\mathbb{C}$ of complex numbers, $B$ be a Borel subgroup of $G$ containing a maximal torus $T$ of $G.$ Let $w$ be an element of the Weyl group $W$ and $X(w)$ be the Schubert variety in $G/B$ corresponding to $w$. In this article we show that given any parabolic subgroup $P$ of $G$ containing $B$ properly, there is an element $w\in W$ such that $P$ is the connected component, containing the identity element of the group of all algebraic automorphisms of $X(w).$

Comments: 10 pages
Journal: Comptes Rendus Mathematique, Volume 356, Issue 5, May 2018, Pages 542-549
Categories: math.AG, math.CO, math.GR
Subjects: 14M15
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