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We develop a general approach to prove K-stability of Fano varieties. The new theory is used to (a) prove the existence of K\"ahler-Einstein metrics on all smooth Fano hypersurfaces of Fano index two, (b) to compute the stability thresholds…

代数几何 · 数学 2022-06-15 Hamid Abban , Ziquan Zhuang

We prove a criterion for K-stability of a $\mathbb{Q}$-Fano spherical variety with respect to equivariant special test configurations, in terms of its moment polytope and some combinatorial data associated to the open orbit. Combined with…

代数几何 · 数学 2020-09-16 Thibaut Delcroix

We study the problem of existence of K\"ahler--Einstein metrics on smooth Fano threefolds of Picard rank one and anticanonical degree $22$ that admit a faithful action of the multiplicative group $\mathbb{C}^\ast$. We prove that, except…

代数几何 · 数学 2022-04-06 Ivan Cheltsov , Constantin Shramov

We develop a variational calculus for a certain free energy functional on the space of all probability measures on a Kahler manifold X. This functional can be seen as a generalization of Mabuchi's K-energy functional and its twisted…

微分几何 · 数学 2012-11-14 Robert J. Berman

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.

微分几何 · 数学 2017-02-22 Cristiano Spotti , Song Sun , Chengjian Yao

We give a criterion for the coercivity of the Mabuchi functional for general K\"ahler classes on Fano manifolds in terms of Tian's alpha invariant. This generalises a result of Tian in the anti-canonical case implying the existence of a…

微分几何 · 数学 2016-04-19 Ruadhaí Dervan

Consider a polarized complex manifold (X,L) and a ray of positive metrics on L defined by a positive metric on a test configuration for (X,L). For most of the common functionals in K\"ahler geometry, we prove that the slope at infinity…

微分几何 · 数学 2020-05-21 Sébastien Boucksom , Tomoyuki Hisamoto , Mattias Jonsson

We continue the investigation into the computational status of the existence of moduli of regularity (and their use for rates of convergence) in the sense of Kohlenbach, Lopez and Nicolae (2019), carried out w.r.t. classical reverse…

计算机科学中的逻辑 · 计算机科学 2026-03-05 Ulrich Kohlenbach

In this short note, we prove that on a compact K\"ahler variety $X$ with log terminal singularities and $c_1(X)=0$, any singular Ricci-flat K\"ahler metric has orbifold singularities in restriction to the orbifold locus of $X$.

微分几何 · 数学 2025-09-12 Henri Guenancia , Chung-Ming Pan , Mihai Păun

In this short note, we consider a fiberation f: (X, Delta) to Y between two compact Kahler manifolds with generic fiber of f being a smooth log canonical pair with ample canonical divisor, we prove that the current induced by variation of…

微分几何 · 数学 2026-01-06 Xin Fu , Jiyuan Han , Yongpan Zou

Let $G$ be a complex, connect reductive Lie group which is the complexification of a compact Lie group $K$. Let $M$ be a $\mathbb Q$-Fano $G$-compactification. In this paper, we first prove the uniqueness of $K\times K$-invariant (singular)…

微分几何 · 数学 2020-11-06 Yan Li , ZhenYe Li

We establish the existence of a regular functional $M$-position, in the sense of Pisier, for geometric log-concave functions. This provides a functional analogue of Pisier's regular $M$-positions for convex bodies and yields uniform control…

度量几何 · 数学 2026-03-03 Apostolos Giannopoulos , Natalia Tziotziou

We prove continuity results for new stability thresholds related to uniform K-stability and deduce that uniform K-stability is an open condition in the K\"ahler cone of any compact K\"ahler manifold, thus establishing an algebro-geometric…

微分几何 · 数学 2022-03-01 Zakarias Sjöström Dyrefelt

We prove a Tauberian theorem for the Laplace--Stieltjes transform and Karamata-type theorems in the framework of regularly log-periodic functions. As an application we determine the exact tail behavior of fixed points of certain type…

概率论 · 数学 2017-09-08 Peter Kevei

Well-known conjectures of Tian predict that existence of canonical Kahler metrics should be equivalent to various notions of properness of Mabuchi's K-energy functional. In some instances this has been verified, especially under restrictive…

微分几何 · 数学 2017-03-08 Tamás Darvas , Yanir A. Rubinstein

We present the design, implementation, and foundation of a verifier for higher-order functional programs with generics and recursive data types. Our system supports proving safety and termination using preconditions, postconditions and…

计算机科学中的逻辑 · 计算机科学 2020-03-25 Jad Hamza , Nicolas Voirol , Viktor Kunčak

In this paper, we prove the Skoda-Zeriahi type integrability theorem with respect to some measure with $L^1$-density. In addition, we introduce the log-log threshold in order to detect singularities of K\"{a}hler potentials. We prove the…

微分几何 · 数学 2026-02-24 Takahiro Aoi

We prove an existence result for twisted K\"ahler-Einstein metrics, assuming an appropriate twisted K-stability condition. An improvement over earlier results is that certain non-negative twisting forms are allowed.

微分几何 · 数学 2019-11-11 Julius Ross , Gábor Székelyhidi

In this paper, exact rate of approximation of functions by linear means of Fourier series and Fourier integrals and corresponding $K$-functionals are expressed via special moduli of smoothness. . Introduction is given in $\S 1$. In $\S2$…

经典分析与常微分方程 · 数学 2016-06-27 R. M. Trigub

In this paper, we prove an existence result for K\"ahler-Einstein metrics on $\mathbb Q$-Fano compactifications of Lie groups. As an application, we classify $\mathbb Q$-Fano compactifications of $SO_4(\mathbb C)$ which admit a…

微分几何 · 数学 2020-01-31 Yan Li , Gang Tian , Xiaohua Zhu