Results 51 to 60 of about 26,527 (250)

On the Classification of Residues of the Grassmannian [PDF]

, 2010
We study leading singularities of scattering amplitudes which are obtained as residues of an integral over a Grassmannian manifold. We recursively do the transformation from twistors to momentum twistors and obtain an iterative formula for Yangian ...
A Brandhuber, A Brandhuber, A Tsikh, C Cheung, E Witten, Eleonora Dell’Aquila, F Cachazo, G Korchemsky, G Korchemsky, G Korchemsky, IA Aizenberg, J Bedford, J Drummond, J Drummond, J Drummond, J Drummond, J Drummond, J Drummond, J Drummond, J Drummond, J Drummond, J Kaplan, J McGreevy, JM Drummond, L Dolan, L Mason, L Mason, LF Alday, M Bullimore, M Bullimore, M Spradlin, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, N Arkani-Hamed, N Beisert, N Berkovits, P Benincasa, P Griffiths, R Britto, R Britto, R Penrose, R Penrose, R Penrose, R Penrose, Sujay K. Ashok, Z Bern, Z Bern, Z Bern, Z Bern, Z Bern, Z Bern, Z Bern   +55 more
core   +2 more sources

Weighted Grassmannians [PDF]

, 2002
For the proceedings of Paolo Francia memorial conference, Genova, Sep 2001, edited by Mauro Beltrametti, to appear de Gruyter 2002.
Corti, Alessio, Reid, Miles
openaire   +2 more sources

Minimum distance of Symplectic Grassmann codes [PDF]

, 2015
We introduce the Symplectic Grassmann codes as projective codes defined by symplectic Grassmannians, in analogy with the orthogonal Grassmann codes introduced in [4]. Note that the Lagrangian-Grassmannian codes are a special class of Symplectic Grassmann
Cardinali, Ilaria, Giuzzi, Luca
core   +2 more sources

The Chirotropical Grassmannian

Le Matematiche
Recent developments in particle physics have revealed deep connections between scattering amplitudes and tropical geometry. From the heart of this relationship emerged the chirotropical Grassmannian $\text{Trop}^χ\text{G}(k,n)$ and the chirotropical Dressian $\text{Dr}^χ(k,n)$, polyhedral fans built from uniform realizable chirotopes that encode the ...
Antolini, Dario, Early, Nick
openaire   +4 more sources

Tropicalization of positive Grassmannians [PDF]

Selecta Mathematica, 2019
We introduce combinatorial objects which are parameterized by the positive part of the tropical Grassmannian $Gr(k,n)$. Our method is to relate the Grassmannian to configuration spaces of flags. By work of the first author, and of Goncharov and Shen, configuration spaces of flags naturally tropicalize to give configurations of points in the affine ...
Le, Ian, Fraser, Chris
openaire   +3 more sources

An existence theorem for generalized quasi-variational inequalities involving the Grassmannian manifold with an application

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2020
We present an existence theorem for a class of generalized quasi-variational problem involving Grassmannian manifolds. This class is directly inspired by a general equilibrium problem with time, uncertainty and incomplete financial market with real ...
Maria B. Donato, Antonio Villanacci
doaj   +1 more source

Remarks on Grassmannian supermanifolds [PDF]

Transactions of the American Mathematical Society, 1988
This paper studies some aspects of a particular class of examples of supermanifolds; the supergrassmannians, introduced in [Manin]. Their definition, in terms of local data and glueing isomorphisms, is reviewed. Explicit formulas in local coordinates are given for the Lie group action they come equipped with.
Oscar Adolfo, Sanchez Valenzuela
openaire   +1 more source

On computing local monodromy and the numerical local irreducible decomposition

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract Similarly to the global case, the local structure of a holomorphic subvariety at a given point is described by its local irreducible decomposition. Geometrically, the key requirement for obtaining a local irreducible decomposition is to compute the local monodromy action of a generic linear projection at the given point, which is always well ...
Parker B. Edwards, Jonathan D. Hauenstein   +1 more
wiley   +1 more source

EQUIVARIANT -THEORY OF GRASSMANNIANS [PDF]

Forum of Mathematics, Pi, 2017
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. J.119(2) (2003), 221–260]. That is, we prove a combinatorial rule for the structure coefficients
OLIVER PECHENIK, ALEXANDER YONG
openaire   +4 more sources

Witten genera of complete intersections

Bulletin of the London Mathematical Society, Volume 58, Issue 2, February 2026.
Abstract We prove vanishing results for Witten genera of string generalized complete intersections in homogeneous Spinc$\text{Spin}^c$‐manifolds and in other Spinc$\text{Spin}^c$‐manifolds with Lie group actions. By applying these results to Fano manifolds with second Betti number equal to one we get new evidence for a conjecture of Stolz.
Michael Wiemeler
wiley   +1 more source