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Seshadri stratifications and Schubert varieties: a geometric construction of a standard monomial theory (2207.08904v1)
Published 18 Jul 2022 in math.AG, math.CO, and math.RT
Abstract: A standard monomial theory for Schubert varieties is constructed exploiting (1) the geometry of the Seshadri stratifications of Schubert varieties by their Schubert subvarieties and (2) the combinatorial LS-path character formula for Demazure modules. The general theory of Seshadri stratifications is improved by using arbitrary linearization of the partial order and by weakening the definition of balanced stratification.
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