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We show that any pseudo-effective divisor on a normal surface decomposes uniquely into its "integral positive" part and "integral negative" part, which is an integral analog of Zariski decompositions. By using this decomposition, we give…

Algebraic Geometry · Mathematics 2020-11-18 Makoto Enokizono

We construct a Zariski decomposition for cycle classes of arbitrary codimension. This decomposition is an analogue of well-known constructions for divisors. Examples illustrate how Zariski decompositions of cycle classes reflect the…

Algebraic Geometry · Mathematics 2016-01-14 Mihai Fulger , Brian Lehmann

In this note we consider the problem of integrality of Zariski decompositions for pseudoeffective integral divisors on algebraic surfaces. We show that while sometimes integrality of Zariski decompositions forces all negative curves to be…

Algebraic Geometry · Mathematics 2016-01-19 Brian Harbourne , Piotr Pokora , Halszka Tutaj-Gasińska

We discuss different generalizations of Zariski decomposition, relations between them and connections with finite generation of divisorial algebras.

Algebraic Geometry · Mathematics 2010-04-26 Yuri G. Prokhorov

Based on a recent work by Thomas Bauer reproving the existence of Zariski decompositions for surfaces, we construct a b-divisorial analogue of Zariski decomposition in all dimensions.

Algebraic Geometry · Mathematics 2008-10-15 Alex Kuronya , Catriona Maclean

Using currents with minimal singularities, we construct pointwise minimal multiplicities for a real pseudo-effective $(1,1)$-class $\alpha$ on a compact complex $n$-fold $X$, which are the local obstructions to the numerical effectivity of…

Algebraic Geometry · Mathematics 2016-09-07 Sebastien Boucksom

In this paper, we establish the Zariski decompositions of arithmetic R-divisors of continuous type on arithmetic surfaces and investigate several properties. We also develop the general theory of arithmetic R-divisors on arithmetic…

Algebraic Geometry · Mathematics 2011-01-26 Atsushi Moriwaki

In this note we give a quick and simple proof of the existence (and uniqueness) of Zariski decompositions on surfaces. While Zariski's original proof employs a rather sophisticated procedure to construct the negative part of the…

Algebraic Geometry · Mathematics 2007-12-11 Thomas Bauer

Let $\alpha$ be a big class on a compact K\"ahler manifold. We prove that a decomposition $\alpha=\alpha_1+\alpha_2$ into the sum of a modified nef class $\alpha_1$ and a pseudoeffective class $\alpha_2$ is the divisorial Zariski…

Algebraic Geometry · Mathematics 2015-06-17 Eleonora Di Nezza , Enrica Floris , Stefano Trapani

Zariski decomposition plays an important role in the theory of algebraic surfaces due to many applications. For irreducible symplectic manifolds Boucksom provided a characterization of his divisorial Zariski decomposition in terms of the…

Algebraic Geometry · Mathematics 2026-03-26 Michał Kapustka , Giovanni Mongardi , Gianluca Pacienza , Piotr Pokora

In this paper, we characterize smooth projective surfaces on which every integral pseudoeffective divisor has an integral Zariski decomposition.

Algebraic Geometry · Mathematics 2024-12-16 Sichen Li

We prove that, on a smooth threefold, pseudoeffective divisors with closed and one-dimensional diminished base locus have birationally a Fujita-Zariski decomposition.

Algebraic Geometry · Mathematics 2013-08-28 Enrica Floris

In this note we use the divisorial Zariski decomposition to give a more intrinsic version of the algebraic Morse inequalities.

Complex Variables · Mathematics 2010-03-29 Stefano Trapani

We prove that termination of lower dimensional flips for generalized klt pairs implies termination of flips for log canonical generalized pairs with a weak Zariski decomposition. Moreover, we prove that the existence of weak Zariski…

Algebraic Geometry · Mathematics 2020-03-26 Christopher D. Hacon , Joaquín Moraga

For a compact hyperk\"ahler manifold X, we show certain Zariski decomposition for every pseudo-effective R-divisor, and give a sufficient condition for X to be bimeromorphic to a (holomorphic) Lagrangian fibration. We also prove that any…

Algebraic Geometry · Mathematics 2014-04-30 Daisuke Matsushita , De-Qi Zhang

We show that the orthogonality conjecture for divisorial Zariski decompositions on compact Kahler manifolds holds for pseudoeffective (1,1) classes with volume zero.

Complex Variables · Mathematics 2019-03-12 Valentino Tosatti

The purpose of this paper is to investigate the close relation between Okounkov bodies and Zariski decompositions of pseudoeffective divisors on smooth projective surfaces. Firstly, we completely determine the limiting Okounkov bodies on…

Algebraic Geometry · Mathematics 2017-04-25 Sung Rak Choi , Jinhyung Park , Joonyeong Won

We study the divisorial Zariski decomposition on varieties whose first Chern class is zero. We first prove that any exceptional divisor is contractible (up to a birational map that is an isomorphism in codimension one). We then characterize…

Algebraic Geometry · Mathematics 2009-02-09 Stéphane Druel

Let X be a smooth projective variety over an algebraically closed field of positive characteristic. We prove that if D is a pseudo-effective R-divisor on X which is not numerically equivalent to the negative part in its divisorial Zariski…

Algebraic Geometry · Mathematics 2013-06-13 Paolo Cascini , Christopher Hacon , Mircea Mustata , Karl Schwede

In this note we introduce a Waldschmidt decomposition of divisors which might be viewed as a generalization of Zariski decomposition based on the effectivity rather than the nefness of divisors. As an immediate application we prove a…

Algebraic Geometry · Mathematics 2018-02-27 Marcin Dumnicki , Tomasz Szemberg , Justyna Szpond
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