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In our previous work, we introduced the Generalised Nonvanishing Conjecture, which generalises several central conjectures in algebraic geometry. In this paper, we derive some surprising nonvanishing results for pluricanonical bundles which…

代数几何 · 数学 2020-04-01 Vladimir Lazić , Thomas Peternell

We prove several results relating the nonvanishing and the existence of good minimal models of different pairs that have the same underlying variety.

代数几何 · 数学 2026-03-26 Vladimir Lazić

We give a quick new approach to the main cases of the nonvanishing theorems of first and third authors concerning the asymptotic behavior of the syzygies of a projective variety as the positivity of the embedding line bundle grows.…

代数几何 · 数学 2018-04-30 Lawrence Ein , Daniel Erman , Robert Lazarsfeld

We prove that the non-vanishing conjecture and the log minimal model conjecture for projective log canonical pairs can be reduced to the non-vanishing conjecture for smooth projective varieties such that the boundary divisor is zero.

代数几何 · 数学 2017-11-22 Kenta Hashizume

The Abundance conjecture predicts that on a minimal projective klt pair $(X,\Delta)$, the adjoint divisor $K_X+\Delta$ is semiample. When $\chi(X,\mathcal O_X)\neq0$, we give a necessary and sufficient condition for the conjecture to hold…

代数几何 · 数学 2024-06-27 Vladimir Lazić

We give a new and self-contained proof of the finite generation of adjoint rings with big boundaries. As a consequence, we show that the canonical ring of a smooth projective variety is finitely generated.

代数几何 · 数学 2019-12-19 Paolo Cascini , Vladimir Lazić

We show that a weak version of the canonical bundle formula holds for fibrations of relative dimension one. We provide various applications thereof, for instance, using the recent result of Xu and Zhang, we prove the log non-vanishing…

代数几何 · 数学 2018-04-11 Jakub Witaszek

We prove that self-similar measures on the real line are absolutely continuous for almost all parameters in the super-critical region, in particular confirming a conjecture of S-M. Ngai and Y. Wang. While recently there has been much…

动力系统 · 数学 2024-09-24 Santiago Saglietti , Pablo Shmerkin , Boris Solomyak

For a certain parametrized family of maps on the circle, with critical points and logarithmic singularities where derivatives blow up to infinity, a positive measure set of parameters was constructed in [19], corresponding to maps which…

动力系统 · 数学 2012-02-07 Hiroki Takahasi

We prove that the finite generation of adjoint rings proved in [Cascini and Lazi\'c] implies all the foundational results of the Minimal Model Program: the Rationality, Cone and Contraction theorems, the existence of flips, and termination…

代数几何 · 数学 2013-05-08 Alessio Corti , Vladimir Lazić

We discuss the relationship among various conjectures in the minimal model theory including the finite generation conjecture of the log canonical rings and the abundance conjecture. In particular, we show that the finite generation…

代数几何 · 数学 2013-07-15 Osamu Fujino , Yoshinori Gongyo

We prove several finiteness theorems for the normal bundles to souls in nonnegatively curved manifolds. More generally, we obtain finiteness results for open Riemannian manifolds whose topology is concentrated on compact domains of…

微分几何 · 数学 2007-05-23 Igor Belegradek , Vitali Kapovitch

Given an effectively parameterized family of canonically polarized manifolds the Kaehler-Einstein metrics on the fibers induce a hermitian metric on the relative canonical bundle. We use a global elliptic equation to show that this metric…

复变函数 · 数学 2010-10-20 Georg Schumacher

We obtain sufficient conditions exlcuding the existence of non-trivial distribution sections of bundles over the boundary of symmetric spaces of negative curvature which are invariant with respect to a geometrically finite group of…

微分几何 · 数学 2007-05-23 Ulrich Bunke , Martin Olbrich

In this article we prove that for a large class of 2-dimensional minimal cones (including almost all 2-dimensional minimal cones that we know), the almost orthogonal union of any two of them is still a minimal cone. Comparing to existing…

经典分析与常微分方程 · 数学 2018-08-30 Xiangyu Liang

Varieties with log terminal and log canonical singularities are considered in the Minimal Model Program, see \cite{...} for introduction. In \cite{shokurov:hyp} it was conjectured that many of the interesting sets, associated with these…

alg-geom · 数学 2015-06-30 Valery Alexeev

Our interest is a regularity of a minimal singular metric of a line bundle. One main conclusion of our general result in this paper is the existence of continuous Hermitian metrics with semi-positive curvatures on the so-called Zariski's…

复变函数 · 数学 2014-02-11 Takayuki Koike

We show by an example that the (equivalence class of) singularity of a plurisubharmonic function cannot be determined by the data of its Lelong numbers, in a nontrivial sense. Such an example is provided by Siu-type singular hermitian…

复变函数 · 数学 2014-10-21 Dano Kim

Nonvanishing theorems play a central role in birational geometry, since they derive geometric consequences from numerical information and constitute a crucial step towards abundance and semiampleness problems. General nonvanishing…

代数几何 · 数学 2025-10-22 Andreas Höring , Vladimir Lazić , Christian Lehn

We argue that the finiteness of quantum gravity amplitudes in fully compactified theories (at least in supersymmetric cases) leads to a bottom-up prediction for the existence of non-trivial dualities. In particular, finiteness requires the…

高能物理 - 理论 · 物理学 2025-08-20 Matilda Delgado , Damian van de Heisteeg , Sanjay Raman , Ethan Torres , Cumrun Vafa , Kai Xu
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