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A Congruence Modulo Four for Real Schubert Calculus with Isotropic Flags
Published online by Cambridge University Press: 20 November 2018
Abstract
We previously obtained a congruence modulo four for the number of real solutions to many Schubert problems on a square Grassmannian given by osculating flags. Here we consider Schubert problems given by more general isotropic flags, and prove this congruence modulo four for the largest class of Schubert problems that could be expected to exhibit this congruence.
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- Copyright © Canadian Mathematical Society 2017