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Network parameterizations for the Grassmannian
Published 2013-01-01Subjects: “…grassmannian…”
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EQUIVARIANT $K$ -THEORY OF GRASSMANNIANS
Published 2017-01-01“…We address a unification of the Schubert calculus problems solved by Buch [A Littlewood–Richardson rule for the $K$ -theory of Grassmannians, Acta Math. 189 (2002), 37–78] and Knutson and Tao [Puzzles and (equivariant) cohomology of Grassmannians, Duke Math. …”
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Total positivity for the Lagrangian Grassmannian
Published 2020-04-01“…The positroid decomposition of the Grassmannian refines the well-known Schubert decomposition, and has a rich combinatorial structure. …”
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POSITIVE GRASSMANNIAN AND POLYHEDRAL SUBDIVISIONS
Published 2021“…© ICM 2018.All rights reserved. The nonnegative Grassmannian is a cell complex with rich geometric, algebraic, and combinatorial structures. …”
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Sign variation, the Grassmannian, and total positivity
Published 2015-01-01Subjects: “…totally nonnegative grassmannian…”
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On Lagrangian Grassmannian Variety and Plücker Matrices
Published 2024-03-01Subjects: “…Lagrangian Grassmannian…”
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Non-planar BCFW Grassmannian geometries
Published 2022-12-01“…We show that these terms can be interpreted as dlog forms on the non-planar Grassmannian geometries, generalizing the cells of the positive Grassmannian G +(k, n) to a larger class of objects which live in G(k, n). …”
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Noncrossing sets and a Graßmannian associahedron
Published 2014-01-01Subjects: “…graßmannian…”
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Arrangements of equal minors in the positive Grassmannian
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On the Variety of Paths on Complete Intersections in Grassmannians
Published 2014-08-01“…In this article we study the Fano variety of lines on the complete intersection of the grassmannian G(n, 2n) with hypersurfaces of degrees d1 ..., di . …”
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Arrangements of equal minors in the positive Grassmannian
Published 2018“…Weakly separated sets, originally introduced by Leclerc and Zelevinsky, are closely related to the positive Grassmannian and the associated cluster algebra. However, we also construct examples of arrangements of smallest minors which are not weakly separated using chain reactions of mutations of plabic graphs. …”
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Mirabolic affine Grassmannian and character sheaves
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A $t$-generalization for Schubert Representatives of the Affine Grassmannian
Published 2013-01-01“…We introduce two families of symmetric functions with an extra parameter $t$ that specialize to Schubert representatives for cohomology and homology of the affine Grassmannian when $t=1$. The families are defined by a statistic on combinatorial objects associated to the type-$A$ affine Weyl group and their transition matrix with Hall-Littlewood polynomials is $t$-positive. …”
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Real Hypersurfaces in Complex Grassmannians of Rank Two
Published 2021-12-01Subjects: “…complex Grassmannians of rank two…”
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The ABC's of affine Grassmannians and Hall-Littlewood polynomials
Published 2012-01-01“…In doing so, we prove a new combinatorial formula for representatives of the Schubert classes for the cohomology of affine Grassmannians. We show how new combinatorics involved in our formulas gives the Kostka-Foulkes polynomials and discuss how this can be applied to study the transition matrices between Hall-Littlewood and $k$-Schur functions.…”
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0-Cycles on Grassmannians as Representations of Projective Groups
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Arrangements Of Minors In The Positive Grassmannian And a Triangulation of The Hypersimplex
Published 2015-01-01“…The structure of zero and nonzero minors in the Grassmannian leads to rich combinatorics of matroids. …”
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Torus quotient of the Grassmannian $G_{n,2n}$
Published 2023-11-01Subjects: “…Grassmannian…”
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Cohomology algebra of mapping spaces between quaternion Grassmannians
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