The defining ideals of conjugacy classes of nilpotent matrices and a conjecture of Weyman

Description

Tanisaki introduced generating sets for the defining ideals of the schematic intersections of the closure of conjugacy classes of nilpotent matrices with the set of diagonal matrices. These ideals are naturally labeled by integer partitions. Given such a partition λ, we define several methods to produce a reduced generating set for the associated ideal Iλ. For particular shapes we find nice generating sets. By comparing our sets with some generating sets of Iλ arising from a work of Weyman, we find a counterexample to a related conjecture of Weyman.

Abstract

Natural Sciences and Engineering Research Council of Canada

Abstract

Ministerio de Educación y Ciencia

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