Lower bounds for numbers of real solutions in problems of Schubert calculus
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2016-09
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English
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Springer
Abstract
We give lower bounds for the numbers of real solutions in problems appearing in Schubert calculus in the Grassmannian Gr(n,d)Gr(n,d) related to osculating flags. It is known that such solutions are related to Bethe vectors in the Gaudin model associated to glngln. The Gaudin Hamiltonians are self-adjoint with respect to a non-degenerate indefinite Hermitian form. Our bound comes from the computation of the signature of that form.
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Mukhin, E., & Tarasov, V. (2016). Lower bounds for numbers of real solutions in problems of Schubert calculus. Acta Mathematica, 217(1), 177–193. https://doi.org/10.1007/s11511-016-0143-3
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Acta Mathematica
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ArXiv
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Article
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Author's manuscript