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In this article, we prove the conjecture of Bar-Natan, Garoufalidis, and Khovanov's on the support of the Khovanov's invariants for alternating knots.

Geometric Topology · Mathematics 2007-05-23 Eun Soo Lee

We study a variant of algebraic K-theory and prove that it is stable and preserves module structures.

Category Theory · Mathematics 2016-05-27 Sanath Devalapurkar

We express notions of K-stability of polarized spherical varieties in terms of combinatorial data, vastly generalizing the case of toric varieties. We then provide a combinatorial sufficient condition of G-uniform K-stability by studying…

Algebraic Geometry · Mathematics 2026-03-25 Thibaut Delcroix

In this note, we prove that stable equivalences of Morita type between blocks of finite groups induce identification of certain quotient fusion systems under sone assumption. We also collect some related results for separable equivalences.

Representation Theory · Mathematics 2025-09-30 Conghui Li

In this article, we discuss and survey the recent progress towards the Schottky problem, and make some comments on the relations between the Andr{\'e}-Oort conjecture, Okounkov convex bodies, Coleman's conjecture, stable modular forms,…

Algebraic Geometry · Mathematics 2024-01-04 Jae-Hyun Yang

In this paper, we explore the wall crossing phenomenon for K-stability, and apply it to explain the wall crossing for K-moduli stacks and K-moduli spaces.

Algebraic Geometry · Mathematics 2023-04-13 Chuyu Zhou

We prove that K-polystable degenerations of Q-Fano varieties are unique. Furthermore, we show that the moduli stack of K-stable Q-Fano varieties is separated. Together with [Jia17,BL18], the latter result yields a separated Deligne-Mumford…

Algebraic Geometry · Mathematics 2019-07-10 Harold Blum , Chenyang Xu

We survey some recent developments in the direction of the Yau-Tian-Donaldson conjecture, which relates the existence of constant scalar curvature K\"ahler metrics to the algebro-geometric notion of K-stability. The emphasis is put on the…

Differential Geometry · Mathematics 2018-05-10 Sébastien Boucksom

We show that certain Galois covers of K-semistable Fano varieties are K-stable. We use this to give some new examples of Fano manifolds admitting K\"ahler-Einstein metrics, including hypersurfaces, double solids and threefolds.

Algebraic Geometry · Mathematics 2018-05-16 Ruadhaí Dervan

An attempt is made for a new type of analysis of the time-variability of the fine-structure constant trying to fit the most recent result from the laboratory measurements, the Oklo constraint and the data from the QSO absorption lines all…

Astrophysics · Physics 2009-12-04 Yasunori Fujii

As recently pointed out by Li and Xu, the definition of K-stability, and the author's proof of K-stability for cscK manifolds without holomorphic vector fields, need to be altered slightly: the Donaldson-Futaki invariant is positive for all…

Algebraic Geometry · Mathematics 2011-11-28 Jacopo Stoppa

In this paper, we establish a general relationship between the nonvanishing of GW invariants with the existence of the closed orbits of a Hamiltonian system. As an application, we completely solved the stabilized Weinstein conjecture.

dg-ga · Mathematics 2007-05-23 Gang Liu , Gang Tian

The generating series of descendent invariants of stable pairs on 3-folds is conjectured to be rational and to satisfy a $q\leftrightarrow q^{-1}$ symmetry. We prove this conjecture for Fano 3-folds. We utilize the same path of stability…

Algebraic Geometry · Mathematics 2026-04-08 Ivan Karpov , Miguel Moreira

We prove a version of Fujita's Conjecture in arbitrary characteristic, generalizing results of K.E. Smith. Our methods use the Frobenius morphism, but avoid tight closure theory. We also obtain versions of Fujita's Conjecture for coherent…

Algebraic Geometry · Mathematics 2021-01-26 Dennis S. Keeler

We prove the existence of Kahler-Einstein metrics on Q-Gorenstein smoothable, K-polystable Q-Fano varieties, and we show how these metrics behave, in the Gromov-Hausdorff sense, under Q-Gorenstein smoothings.

Differential Geometry · Mathematics 2017-02-22 Cristiano Spotti , Song Sun , Chengjian Yao

It's well-known that adding a general boundary would create K-stability. As an application, we reprove product theorem for delta invariants of Fano varieties.

Algebraic Geometry · Mathematics 2025-01-06 Chuyu Zhou

We prove the bigness of the Chow-Mumford line bundle associated to a $\mathbb{Q}$-Gorenstein family of log Fano varieties of maximal variation with uniformly K-stable general geometric fibers. This result generalizes a recent theorem of…

Algebraic Geometry · Mathematics 2022-01-03 Quentin Posva

In a recent paper, we stated conjectural presentations for the equivariant quantum K ring of partial flag varieties, motivated by physics considerations. In this companion paper, we analyze these presentations mathematically. We start by…

Algebraic Geometry · Mathematics 2024-11-18 Wei Gu , Leonardo C. Mihalcea , Eric Sharpe , Weihong Xu , Hao Zhang , Hao Zou

We prove that on any log Fano pair of dimension $n$ whose stability threshold is less than $\frac{n+1}{n}$, any valuation computing the stability threshold has a finitely generated associated graded ring. Together with earlier works, this…

Algebraic Geometry · Mathematics 2022-02-15 Yuchen Liu , Chenyang Xu , Ziquan Zhuang

We prove that smooth Fano 3-folds in the families 2.18 and 3.4 are K-stable.

Algebraic Geometry · Mathematics 2023-04-25 Ivan Cheltsov , Kento Fujita , Takashi Kishimoto , Jihun Park