Results 91 to 100 of about 36,312 (298)
Wall‐crossing for quasimaps to GIT stack bundles
Journal of the London Mathematical Society, Volume 111, Issue 6, June 2025.Abstract We define the notion of ε$\epsilon$‐stable quasimaps to a GIT stack bundle, and study the wall‐crossing behavior of the resulting ε$\epsilon$‐quasimap theory as ε$\epsilon$ varies.
Shidhesh Supekar, Hsian‐Hua Tseng
wiley +1 more source
Reductive groups, the loop Grassmannian, and the Springer resolution [PDF]
, 2016 In this paper we prove equivalences of categories relating the derived category of a block of the category of representations of a connected reductive algebraic group over an algebraically closed field of characteristic p bigger than the Coxeter number ...
Pramod N. Achar, S. Riche
semanticscholar +1 more source
Infinite dimensional Grassmannians
arXiv: Algebraic Topology, 2003 We study the analytic and homotopy properties of some infinite dimensional Grassmannians, useful for developing a Morse theory for infinite dimensional manifolds. We study the space of Fredholm pairs of a Hilbert space, we determine its homotopy type, and we define a determinant bundle over it.
ABBONDANDOLO, ALBERTO, MAJER, PIETRO
openaire +4 more sources
Journal of the London Mathematical Society, Volume 111, Issue 5, May 2025.Abstract Using iterated uniform local completion, we introduce a notion of continuous CR$CR$ functions on locally closed subsets of reduced complex spaces, generalising both holomorphic functions and CR$CR$ functions on CR$CR$ submanifolds. Under additional assumptions of set‐theoretical weak pseudo‐concavity, we prove optimal maximum modulus ...
Mauro Nacinovich, Egmont Porten
wiley +1 more source
Equivariant Giambelli formula for the symplectic Grassmannians — Pfaffian Sum Formula [PDF]
Discrete Mathematics & Theoretical Computer Science, 2015 We prove an explicit closed formula, written as a sum of Pfaffians, which describes each equivariant Schubert class for the Grassmannian of isotropic subspaces in a symplectic vector ...
Takeshi Ikeda, Tomoo Matsumura
doaj +1 more source
Numerical Algorithms on the Affine Grassmannian [PDF]
SIAM Journal on Matrix Analysis and Applications, 2016 The affine Grassmannian is a noncompact smooth manifold that parameterizes all affine subspaces of a fixed dimension. It is a natural generalization of Euclidean space, points being zero-dimensional affine subspaces.
Lek-Heng Lim, Ken Sze-Wai Wong, Ke Ye
semanticscholar +1 more source
Enumerative Coding for Grassmannian Space [PDF]
, 2010 The Grassmannian space $\Gr$ is the set of all $k-$dimensional subspaces of the vector space~\smash{$\F_q^n$}. Recently, codes in the Grassmannian have found an application in network coding.
Etzion, Tuvi, Silberstein, Natalia
core
Feigin–Odesskii brackets associated with Kodaira cycles and positroid varieties
Proceedings of the London Mathematical Society, Volume 130, Issue 5, May 2025.Abstract We establish a link between open positroid varieties in the Grassmannians G(k,n)$G(k,n)$ and certain moduli spaces of complexes of vector bundles over Kodaira cycle Cn$C^n$, using the shifted Poisson structure on the latter moduli spaces and relating them to the standard Poisson structure on G(k,n)$G(k,n)$.
Zheng Hua, Alexander Polishchuk
wiley +1 more source
Mori dream bonds and C∗${\mathbb {C}}^*$‐actions
Mathematische Nachrichten, Volume 298, Issue 4, Page 1127-1147, April 2025.Abstract We construct a correspondence between Mori dream regions arising from small modifications of normal projective varieties and C∗${\mathbb {C}}^*$‐actions on polarized pairs which are bordisms. Moreover, we show that the Mori dream regions constructed in this way admit a chamber decomposition on which the models are the geometric quotients of ...
Lorenzo Barban +3 more
wiley +1 more source
On the geometry of the orthogonal momentum amplituhedron
Journal of High Energy Physics, 2022 In this paper we focus on the orthogonal momentum amplituhedron O $$ \mathcal{O} $$ k , a recently introduced positive geometry that encodes the tree-level scattering amplitudes in ABJM theory.
Tomasz Łukowski +2 more
doaj +1 more source