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We show that all toric noncommutative crepant resolutions (NCCRs) of affine GIT quotients of "weakly symmetric" unimodular torus representations are derived equivalent. This yields evidence for a non-commutative extension of a well known…

Algebraic Geometry · Mathematics 2018-04-10 Špela Špenko , Michel Van den Bergh , with an appendix by Jason P. Bell

Resolutions of the diagonal of toric varieties has been an active area of study since Beilinson's celebrated resolution of the diagonal for $\PP^n$ and the disproof of King's conjecture. The author generalized a cellular resolution of the…

Algebraic Geometry · Mathematics 2025-12-16 Reginald Anderson

For the noncommutative 2-torus, we define and study Fourier transforms arising from representations of states with central supports in the bidual, exhibiting a possibly nontrivial modular structure (i.e. type III representations). We then…

Operator Algebras · Mathematics 2019-03-19 Francesco Fidaleo

We extend recent results in order to construct projective resolutions for modules over twisted tensor products of truncated polynomial rings. We begin by taking note of the conditions necessary to think of these algebras as a type of Ore…

Rings and Algebras · Mathematics 2020-04-24 Dustin McPhate

We explore the positive geometry of statistical models in the setting of toric varieties. Our focus lies on models for discrete data that are parameterized in terms of Cox coordinates. We develop a geometric theory for computations in…

Algebraic Geometry · Mathematics 2023-03-23 Michael Borinsky , Anna-Laura Sattelberger , Bernd Sturmfels , Simon Telen

Our main goal is to show that the Gelfand--Tsetlin toric degeneration of the type A flag variety can be obtained within a degenerate representation-theoretic framework similar to the theory of PBW degenerations. In fact, we provide such…

Representation Theory · Mathematics 2020-10-07 Igor Makhlin

We build two embedded resolution procedures of a quasi-ordinary singularity of complex analytic hypersurface, by using toric morphisms which depend only on the characteristic monomials associated to a quasi-ordinary projection of the…

Algebraic Geometry · Mathematics 2007-05-23 Pedro Daniel Gonzalez Perez

In this article, we find the full Fourier expansion for the generalized non-holomorphic Eisenstein series for certain values of parameters. We give a connection of the boundary condition on such Fourier series with convolution formulas on…

Number Theory · Mathematics 2022-09-21 Ksenia Fedosova , Kim Klinger-Logan

In this paper, we will introduce Quantum Toric Varieties which are (non-commutative) generalizations of ordinary toric varieties where all the tori of the classical theory are replaced by quantum tori. Quantum toric geometry is the…

Symplectic Geometry · Mathematics 2020-02-11 Ludmil Katzarkov , Ernesto Lupercio , Laurent Meersseman , Alberto Verjovsky

We give a tropical description of the counting of real log curves in toric degenerations of toric varieties. We treat the case of genus zero curves and all non-superabundant higher-genus situations. The proof relies on log deformation…

Algebraic Geometry · Mathematics 2023-03-03 Hülya Argüz , Pierrick Bousseau

Starting from certain rational varieties blown-up from (P^1)^N, we construct a tropical, i.e., subtraction-free birational, representation of Weyl groups as a group of pseudo isomorphisms of the varieties. Furthermore, we develop an…

Algebraic Geometry · Mathematics 2008-12-09 Teruhisa Tsuda , Tomoyuki Takenawa

We first construct an action of the extended double affine braid group $\mathcal{\ddot{B}}$ on the quantum toroidal algebra $U_{q}(\mathfrak{g}_{\mathrm{tor}})$ in untwisted and twisted types. As a crucial step in the proof, we obtain a…

Quantum Algebra · Mathematics 2024-03-18 Duncan Laurie

In this paper we generalize standard results about non-commutative resolutions of quotient singularities for finite groups to arbitrary reductive groups. We show in particular that quotient singularities for reductive groups always have…

Algebraic Geometry · Mathematics 2017-02-16 Špela Špenko , Michel Van den Bergh

Let $k$ be a perfect field and let $C_0:f=0$ be a smooth curve in the torus $\mathbb{G}_{m,k}^2$. Let $\mathbb{T}_\Delta$ be the toric variety associated to the Newton polygon of $f$. Extending the toric resolution of $C_0$ on…

Algebraic Geometry · Mathematics 2022-03-08 Simone Muselli

In this paper, we introduce the concept of P-difference varieties and study the properties of toric P-difference varieties. Toric P-difference varieties are analogues of toric varieties in difference algebra geometry. The category of affine…

Rings and Algebras · Mathematics 2016-08-25 Jie Wang

We construct parabolic analogues of (global) eigenvarieties, of patched eigenvarieties and of (local) trianguline varieties, that we call respectively Bernstein eigenvarieties, patched Bernstein eigenvarieties, and Bernstein paraboline…

Number Theory · Mathematics 2021-09-15 Christophe Breuil , Yiwen Ding

Topological T-duality is a transformation taking a gerbe on a principal torus bundle to a gerbe on a principal dual-torus bundle. We give a new geometric construction of T-dualization, which allows the duality to be extended in following…

Quantum Algebra · Mathematics 2007-10-07 Calder Daenzer

Fresnel and de Mathan proved that the p-adic Fourier transform is surjective. We reinterpret their result in terms of analytic boundaries, and extend it beyond the cyclotomic case. We also give some applications of their result to Schneider…

Number Theory · Mathematics 2024-03-14 Laurent Berger

We consider gerenalizated permutation equivalence of Vielenkin system on commutative compact torsion finite exponent groups.

Functional Analysis · Mathematics 2013-06-07 A. Czuron , M. Wojciechowski

We generalize the classical Bernstein-Gelfand-Gelfand correspondence to complete intersections in toric varieties.

Representation Theory · Mathematics 2007-06-12 Vladimir Baranovsky