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We prove that for the action of a finite constant group scheme, equivariant algebraic $K$-theory is represented by a colimit of Grassmannians in the equivariant motivic homotopy category. Using this result we show that the set of…

Algebraic Geometry · Mathematics 2025-08-15 K. Arun Kumar , Girja S Tripathi

We show that the algebraic and the symplectic GW-inivariants of smooth projective varieties are equivalent.

alg-geom · Mathematics 2007-05-23 Jun Li , Gang Tian

We give two simple geometric constructions of a smooth family of projective varieties with central fiber isomorphic to the horospherical variety of type $\mathrm{G}_2$ and all other fibers isomorphic to the isotropic orthogonal Grassmannian…

Algebraic Geometry · Mathematics 2023-02-21 Alexander Kuznetsov

Let $Q$ be a finite quiver without loops and $\mathcal{Q}_{\alpha}$ be the Lusztig category for any dimension vector $\alpha$. The purpose of this paper is to prove that all Frobenius eigenvalues of the $i$-th cohomology…

Representation Theory · Mathematics 2018-09-11 Jie Xiao , Fan Xu , Minghui Zhao

We prove Kawaguchi-Silverman conjecture for all surjective endomorphisms on every smooth rationally connected variety admitting an int-amplified endomorphism.

Algebraic Geometry · Mathematics 2019-09-02 Yohsuke Matsuzawa , Shou Yoshikawa

Totally proper quivers, introduced by S.~Fomin and the author arXiv:2406.03604, have many useful properties including powerful mutation invariants. We show that every mutation-acyclic quiver (i.e., a quiver that is mutation equivalent to an…

Representation Theory · Mathematics 2025-10-27 Scott Neville

Let $K$ be an algebraically closed, complete, non-Archimedean valued field of characteristic zero. We prove the non-Archimedean Green--Griffiths--Lang conjecture for projective surfaces of irregularity one. More precisely, we prove that if…

Algebraic Geometry · Mathematics 2025-02-18 Jackson S. Morrow

We give a local characterization for when certain quiver representations in semisimple Abelian categories are semisimple, among them those arising from degenerations of linear series. This paper is the first of two, aimed to describe all…

Algebraic Geometry · Mathematics 2025-12-30 Eduardo Esteves , Renan Santos , Eduardo Vital

We introduce thread quivers as an (infinite) generalization of quivers, and show that every k-linear (k algebraically closed) hereditary category with Serre duality and enough projectives is equivalent to the category of finitely presented…

Representation Theory · Mathematics 2013-07-04 Carl Fredrik Berg , Adam-Christiaan van Roosmalen

We prove the (equivariant) noetherian property for a wide class of varieties generalizing the class of Plucker varieties (Theorem 1). It improves previous results of Draisma-Eggermont who treated the case of bounded Plucker varieties. Key…

Algebraic Geometry · Mathematics 2020-08-24 Ilia Nekrasov

Let $R$ be a ring, $\textrm{Proj}$ be the class of all projective right $R$-modules, $\mathcal K$ be the full subcategory of the homotopy category $\mathbf K(\textrm{Proj})$ whose class of objects consists of all totally acyclic complexes,…

Rings and Algebras · Mathematics 2023-09-21 Manuel Cortés-Izurdiaga

We outline a proof of a geometric version of the Satake isomorphism. Given a connected, complex algebraic reductive group G we show that the tensor category of representations of the dual group $\check G$ is naturally equivalent to a…

alg-geom · Mathematics 2008-02-03 Ivan Mirković , Kari Vilonen

We show that homologically projectively dual varieties for Grassmannians Gr(2,6) and Gr(2,7) are given by certain noncommutative resolutions of singularities of the corresponding Pfaffian varieties. As an application we describe the derived…

Algebraic Geometry · Mathematics 2007-05-23 Alexander Kuznetsov

We prove that the multiplication of sections of globally generated line bundles on a model wonderful variety M of simply connected type is always surjective. This follows by a general argument which works for every wonderful variety and…

Algebraic Geometry · Mathematics 2018-06-26 Paolo Bravi , Jacopo Gandini , Andrea Maffei

We prove a theorem which implies a quantum (multiplicative) analogue of the Horn conjecture, and also of the saturation conjecture. We obtain transversality statements for quantum schubert calculus in any characteristic and also determine…

Algebraic Geometry · Mathematics 2007-05-23 Prakash Belkale

In this text, we characterize the representation type of an acyclic quiver by the properties of its associated quiver Grassmannians. This characterization utilizes and extends known results about singular quiver Grassmannians and cell…

Representation Theory · Mathematics 2019-08-14 Oliver Lorscheid , Thorsten Weist

To each complex composition algebra $\mathbb{A}$, there associates a projective symmetric manifold $X(\mathbb{A})$ of Picard number one, which is just a smooth hyperplane section of the following varieties ${\rm Lag}(3,6), {\rm Gr}(3,6),…

Algebraic Geometry · Mathematics 2026-05-27 Yifei Chen , Baohua Fu , Qifeng Li

In this paper we define strongly projectively flatness of holomorphic maps into the complex Grassmannian manifold, which is a kind of generalization of holomorphic maps into the complex projective space and prove a rigidity of equivariant…

Differential Geometry · Mathematics 2015-12-22 Isami Koga

Denote by $\mathbb G(k,n)$ the Grassmannian of linear subspaces of dimension $k$ in $\mathbb P^n$. We show that if $n>m$ then every morphism $\varphi: \mathbb G(k,n) \to \mathbb G(l,m)$ is constant.

Algebraic Geometry · Mathematics 2025-04-01 Angelo Naldi , Gianluca Occhetta

The mirror theorem is generalized to any smooth projective variety X. That is, a fundamental relation between the Gromov-Witten invariants of X and Gromov-Witten invariants of complete intersections Y in X is established.

Algebraic Geometry · Mathematics 2009-10-31 Yuan-Pin Lee