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TORUS QUOTIENTS OF RICHARDSON VARIETIES IN MINIMAL DIMENSIONAL SCHUBERT VARIETY

Author : Dr Arpita Nayek

Year : 2026

Publisher : Rocky Mountain Mathematics Consortium

Source Title : Journal of Commutative Algebra

Document Type :

Abstract

For 1 ≤ r ≤ n − 1, let Gr,n denote the Grassmannian parametrizing r -dimensional subspaces of Cn. Let (r, n) = 1. We show that the GIT quotients of certain Richardson varieties in Gr,n for the action of a maximal torus in SL(n, C) are the product of projective spaces with respect to the descent of a suitable line bundle.