Approximate Triangulations of Grassmann Manifolds by Kevin P. Knudson

Subjects: “…Grassmannian…”
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Five lectures on cluster theory by Ray Maresca

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Action Recognition via Adaptive Semi-Supervised Feature Analysis by Zengmin Xu, Xiangli Li, Jiaofen Li, Huafeng Chen, Ruimin Hu

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Quantum state tomography as a numerical optimization problem by Violeta N Ivanova-Rohling, Guido Burkard, Niklas Rohling

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Proving Rho Meson Is a Dynamical Gauge Boson of Hidden Local Symmetry by Koichi Yamawaki

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On the mathematical contributions of Giorgio Valli by James Eells

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Genomic Tableaux and Combinatorial $K$-Theory by Oliver Pechenik, Alexander Yong

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Schubert polynomials and $k$-Schur functions (Extended abstract) by Carolina Benedetti, Nantel Bergeron

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K-classes for matroids and equivariant localization by Alex Fink, David Speyer

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On Plücker coordinates of a perfectly oriented planar network by Kelli Talaska

Subjects: “…totally nonnegative grassmannian…”
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Positroids, non-crossing partitions, and positively oriented matroids by Federico Ardila, Felipe Rincón, Lauren Williams

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Combinatorics of Positroids by Suho Oh

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Combinatorics of diagrams of permutations by Joel Brewster Lewis, Alejandro Morales

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Solitons for the coupled matrix nonlinear Schrödinger-type equations and the related Schrödinger flow by Zhong Shiping, Zhao Zehui, Wan Xinjie

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Combinatorial aspects of scattering amplitudes: amplituhedra, T-duality, and cluster algebras by Parisi, M

Subjects: “…Scattering Amplitudes, N=4 Super Yang-Mills Theory, On-shell Methods, Grassmannians, Amplituhedron, Positive Geometries, Algebraic Combinatorics, Combinatorial Algebraic Geometry, Matroid and Positroid Theory, Tropical Geometry, and Cluster Algebras.…”

Biadjoint scalars and associahedra from residues of generalized amplitudes by Freddy Cachazo, Nick Early

“…These residues are supported on certain positroid subvarieties of the Grassmannian G(k, n). In this paper, we replace the Grassmannian G(3, n) with its torus quotient, the moduli space of n points in the projective plane in general position, and planar N $$ \mathcal{N} $$ = 4 SYM with generalized biadjoint scalar amplitudes m n 3 $$ {m}_n^{(3)} $$ as introduced by Cachazo-Early-Guevara-Mizera (CEGM) [1]. …”
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Hilbert space structure and classical limit of the low energy sector of U(N) quantum Hall ferromagnets by Manuel Calixto, Alberto Mayorgas, Julio Guerrero

“…The carrier Hilbert space of irreducible representations of U(N) is described by rectangular Young tableaux of M rows and L columns, and associated with Grassmannian phase spaces U(N)/U(M)×U(N-M). Replacing U(N)-spin operators by their expectation values in a Grassmannian coherent state allows for a semi-classical treatment of the low energy U(N)-spin-wave coherent excitations (skyrmions) of U(N) quantum Hall ferromagnets in terms of Grasmannian nonlinear sigma models.…”
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Positive Configuration Space by Arkani-Hamed, Nima, Lam, Thomas, Spradlin, Marcus

“…Abstract We define and study the totally nonnegative part of the Chow quotient of the Grassmannian, or more simply the nonnegative configuration space. …”
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Carrollian and celestial spaces at infinity by José Figueroa-O’Farrill, Emil Have, Stefan Prohazka, Jakob Salzer

“…We give additional geometric characterisations of these spaces as grassmannians of affine hyperplanes in Minkowski spacetime: Spi is the (double cover of the) grassmannian of affine lorentzian hyperplanes; Ti is the grassmannian of affine spacelike hyperplanes and Ni fibers over the grassmannian of affine null planes, which is I $$ \mathcal{I} $$ . …”
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Combinatorial aspects of total positivity by Williams, Lauren Kiyomi

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