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We prove that Schubert and Richardson varieties in flag manifolds are uniquely determined by their equivariant cohomology classes, as well as a stronger result that replaces Schubert varieties with closures of Bialynicki-Birula cells under…

Algebraic Geometry · Mathematics 2025-08-27 Anders S. Buch , Pierre-Emmanuel Chaput , Nicolas Perrin

We prove the existence of non-classical $p$-adic automorphic eigenforms associated to a classical system of eigenvalues on definite unitary groups in $3$ variables. These eigenforms are associated to Galois representations which are…

Number Theory · Mathematics 2024-06-04 Eugen Hellmann , Valentin Hernandez , Benjamin Schraen

We prove a version of quantum geometric Langlands conjecture in characteristic $p$. Namely, we construct an equivalence of certain localizations of derived categories of twisted crystalline $\mathcal D$-modules on the stack of rank $N$…

Algebraic Geometry · Mathematics 2016-06-08 Roman Travkin

We conjecture that appropriate K-theoretic Gromov-Witten invariants of complex flag manifolds G/B are governed by finite-difference versions of Toda systems constructed in terms of the Langlands-dual quantized universal enveloping algebras…

Algebraic Geometry · Mathematics 2007-05-23 Alexander Givental , Yuan-Pin Lee

The subject of this paper is the big quantum cohomology rings of symplectic isotropic Grassmannians $\text{IG}(2, 2n)$. We show that these rings are regular. In particular, by "generic smoothness", we obtain a conceptual proof of generic…

Algebraic Geometry · Mathematics 2017-05-05 John Alexander Cruz Morales , Alexander Kuznetsov , Anton Mellit , Nicolas Perrin , Maxim Smirnov

In this paper, we reconstruct explicitly the generating function of genus-zero K-theoretic permutation-invariant Gromov-Witten invariants, known as the big $\mathcal{J}$-function, for any partial flag variety. The reconstruction may start…

Algebraic Geometry · Mathematics 2024-11-19 Xiaohan Yan

We prove the Farrell-Jones Isomorphism Conjecture about the algebraic K-theory of a group ring RG in the case where the group G is the fundamental group of a closed Riemannian manifold with strictly negative sectional curvature. The…

Algebraic Topology · Mathematics 2007-05-23 A. Bartels , H. Reich

We study mirror symmetry for orbifold Hurwitz numbers. We show that the Laplace transform of orbifold Hurwitz numbers satisfy a differential recursion, which is then proved to be equivalent to the integral recursion of Eynard and Orantin…

Algebraic Geometry · Mathematics 2014-08-13 Vincent Bouchard , Daniel Hernandez Serrano , Xiaojun Liu , Motohico Mulase

Cluster varieties come in pairs: for any $\mathcal{X}$ cluster variety there is an associated Fock-Goncharov dual $\mathcal{A}$ cluster variety. On the other hand, in the context of mirror symmetry, associated with any log Calabi-Yau…

Algebraic Geometry · Mathematics 2023-08-01 Hülya Argüz , Pierrick Bousseau

We show that, under Dubrovin's notion of ''almost'' duality, the Frobenius manifold structure on the orbit spaces of the extended affine Weyl groups of type $\mathrm{ADE}$ is dual, for suitable choices of weight markings, to the equivariant…

Algebraic Geometry · Mathematics 2025-12-01 Andrea Brini , Jingxiang Ma , Ian A. B. Strachan

Let $G$ be a simple, simply-connected complex algebraic group with Lie algebra $\mathfrak{g}$, and $G/B$ the associated complete flag variety. The Hochschild cohomology $HH^\bullet(G/B)$ is a geometric invariant of the flag variety related…

Representation Theory · Mathematics 2025-01-17 Sam Jeralds

In this paper, we prove the mirror symmetry conjecture between the Saito-Givental theory of exceptional unimodular singularities on Landau-Ginzburg B-side and the Fan-Jarvis-Ruan-Witten theory of their mirror partners on Landau-Ginzburg…

Algebraic Geometry · Mathematics 2014-12-19 Changzheng Li , Si Li , Kyoji Saito , Yefeng Shen

We show the isomorphism between the Quillen cohomology and the Baues-Wirsching cohomology of a cartesian closed category (CCC). This is an extension of the results of Dwyer-Kan for small categories and Jibladze-Pirashvili for small…

Category Theory · Mathematics 2025-12-10 Mirai Ikebuchi

A conjecture, recently stated by Flach and Morin, relates the action of the monodromy on the Galois invariant part of the p-adic Beilinson-Hyodo-Kato cohomology of the generic fiber of a scheme defined over a DVR of mixed characteristic to…

Number Theory · Mathematics 2024-08-08 Bruno Chiarellotto , Nicola Mazzari , Yukihide Nakada

We study a natural enlargement of the BGG Category O for a semisimple Lie algebra: the category of weight modules with trivial central character and finite-dimensional weight spaces supported on the root lattice. We give a geometric…

Representation Theory · Mathematics 2025-12-05 Pablo Boixeda Alvarez , Calder Morton-Ferguson

We prove the Andruskiewitsch-Dumas conjecture that the automorphism group of the positive part of the quantized universal enveloping algebra $U_q({\mathfrak{g}})$ of an arbitrary finite dimensional simple Lie algebra g is isomorphic to the…

Rings and Algebras · Mathematics 2013-11-04 Milen Yakimov

In the algebraic setting, cluster varieties were reformulated by Gross-Hacking-Keel as log Calabi-Yau varieties admitting a toric model. Building on work of Shende-Treumann-Williams-Zaslow in dimension 2, we describe the mirror to the GHK…

Symplectic Geometry · Mathematics 2022-08-05 Benjamin Gammage , Ian Le

For a simple Lie algebra L of type A, D, E we show that any Belavin-Drinfeld triple on the Dynkin diagram of L produces a collection of Drinfeld twists for Lusztig's small quantum group u_q(L). These twists give rise to new…

Representation Theory · Mathematics 2017-03-09 Cris Negron

The geometry of submanifolds is intimately related to the theory of functions and vector bundles. It has been of fundamental importance to find out how those two objects interact in many geometric and physical problems. A typical example of…

Differential Geometry · Mathematics 2009-07-09 Gang Tian

We prove homological mirror symmetry for Milnor fibers of simple singularities in dimensions greater than one, which are among the log Fano cases of Conjecture 1.5 in arXiv:1806.04345. The proof is based on a relation between matrix…

Algebraic Geometry · Mathematics 2021-02-11 Yanki Lekili , Kazushi Ueda
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