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We adapt ideas from Ekedahl [Eke84] to prove a Serre-type duality for Witt-divisorial sheaves of $\mathbb Q$-Cartier divisors on a smooth projective variety over a perfect field of finite characteristic. We also explain its relationship to…

Algebraic Geometry · Mathematics 2022-07-22 Niklas Lemcke

We study fundamental forms of algebraic varieties using the sheaves of principal parts of line bundles and establish a vanishing theorem for any order fundamental forms. We also give connection of fundamental forms with the higher order…

Algebraic Geometry · Mathematics 2023-04-18 Lawrence Ein , Wenbo Niu

In this paper we first prove a version of $L^{2}$ existence theorem for line bundles equipped a singular Hermitian metrics. Aa an application, we establish a vanishing theorem which generalizes the classical Nadel vanishing theorem.

Complex Variables · Mathematics 2020-11-20 Xiankui Meng , Xiangyu Zhou

In this paper, we establish a vanishing theorem of Nadel type for the Witt multiplier ideals on threefolds over perfect fields of characteristic larger than five. As an application, if a projective normal threefold over $\mathbb{F}_q$ is…

Algebraic Geometry · Mathematics 2020-02-19 Yusuke Nakamura , Hiromu Tanaka

We present a generalization of Takegoshi's relative version of the Grauert-Riemenschneider vanishing theorem. Under some natural assumptions, we extend Takegoshi's vanishing theorem to the case of Nakano semi-positive coherent analytic…

Complex Variables · Mathematics 2016-08-11 Martin Sera

We prove an abstract linking theorem that can be used to show existence of solutions to various types of variational elliptic equations, including Schr\"{o}dinger--Poisson--Slater type equations.

Analysis of PDEs · Mathematics 2025-06-03 Kanishka Perera , Kaye Silva

We prove the relative Grauert-Riemenschneider vanishing, Kawamata-Viehweg vanishing, and Koll\'ar injectivity theorems for proper morphisms of schemes of equal characteristic zero, solving conjectures of Boutot and Kawakita. Our proof uses…

Algebraic Geometry · Mathematics 2024-12-24 Takumi Murayama

Multiplier ideals, and the vanishing theorems they satisfy, have found many applications in recent years. In the global setting they have been used to study pluricanonical and other linear series on a projective variety. More recently, they…

Algebraic Geometry · Mathematics 2007-05-23 Manuel Blickle , Robert Lazarsfeld

We prove a semiample generalization of Poonen's Bertini Theorem over a finite field that implies the existence of smooth sections for wide new classes of divisors. The probability of smoothness is computed as a product of local…

Algebraic Geometry · Mathematics 2015-11-03 Daniel Erman , Melanie Matchett Wood

This article discusses the geometric application of the method of multiplier ideal sheaves. It first briefly describes its application to effective problems in algebraic geometry and then presents and explains its application to the…

Algebraic Geometry · Mathematics 2015-06-26 Yum-Tong Siu

A Vitali-type theorem for vector lattice-valued modulars with respect to filter convergence is proved. Some applications are given to modular convergence theorems for moment operatorsin the vector lattice setting, and also for the Brownian…

Functional Analysis · Mathematics 2015-07-24 Antonio Boccuto , Domenico Candeloro , Anna Rita Sambucini

In this paper we prove a relative version of the classical Mumford-Newstead theorem for a family of smooth curves degenerating to a reducible curve with a simple node. We also prove a Torelli-type theorem by showing that certain moduli…

Algebraic Geometry · Mathematics 2016-05-17 Suratno Basu

In this article, we get properties for singular (dual) Nakano semi-positivity and obtain singular type vanishing theorem involving $L^2$-subsheaves on weakly pseudoconvex manifolds by $L^2$-estimates and $L^2$-type Dolbeault isomorphisms.…

Complex Variables · Mathematics 2023-07-27 Yuta Watanabe

In this paper, we prove a semistable reduction type theorem for multi-filtered vector spaces (or known as multi-weighted vector spaces).

Algebraic Geometry · Mathematics 2017-09-27 Shizhang Li

We study a singular Hermitian metric of a vector bundle. First, we prove the sheaf of locally square integrable holomorphic sections of a vector bundle with a singular Hermitian metric, which is a higher rank analogy of a multiplier ideal…

Complex Variables · Mathematics 2018-02-07 Masataka Iwai

The purpose of this paper is to establish a Nadel vanishing theorem for big line bundles with multiplier ideal sheaves of singular metrics admitting an analytic Zariski decomposition (such as, metrics with minimal singularities and Siu's…

Complex Variables · Mathematics 2015-11-16 Shin-ichi Matsumura

We give a short proof of Chevalley's theorem that every algebraic group is an extension of an Abelian variety by a linear algebraic group. Along the way we treat Bertini's irreducibility theorem.

Algebraic Geometry · Mathematics 2026-05-06 János Kollár

We establish an effective Bertini-type theorem for hypersurfaces $X_f \colon f = 0$ defined over a finite field $k$ for which $f$ has no linear factors over the algebraic closure $\overline{k}$. Given a line $L$ defined over $k$ and a…

Number Theory · Mathematics 2026-03-03 Lea Beneish , Christopher Keyes

We prove a version of the classical 'generic smoothness' theorem with smooth varieties replaced by non-commutative resolutions of singular varieties. This in particular implies a non-commutative version of the Bertini theorem.

Algebraic Geometry · Mathematics 2020-06-23 Jørgen Vold Rennemo , Ed Segal , Michel Van den Bergh

Let $X$ be a smooth irreducible projective variety of dimension at least 2 over an algebraically closed field of characteristic 0 in the projective space ${\mathbb{P}}^n$. Bertini's Theorem states that a general hyperplane $H$ intersects…

Algebraic Geometry · Mathematics 2009-10-22 Jing Zhang