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The main purpose of this paper is to establish some useful partial resolutions of singularities for pairs from the minimal model theoretic viewpoint. We first establish the existence of log canonical modifications of normal pairs under some…

代数几何 · 数学 2022-08-10 Osamu Fujino , Kenta Hashizume

In this article, we will prove the Generalized Nonvanishing Conjecture holds for threefolds with either $\kappa>0$ or $q>0$. As a result, we can prove the Iitaka conjecture $C_{n,m}$ holds for $n=7$ if the source space has non-negative…

代数几何 · 数学 2024-03-26 Chi-Kang Chang

We show that the number of deformation types of canonically polarized manifolds over an arbitrary variety with proper singular locus is finite, and that this number is uniformly bounded in any finite type family of base varieties. As a…

代数几何 · 数学 2019-04-08 Sandor J. Kovacs , Max Lieblich

We prove some vanishing and torsion-freeness results for higher direct images of adjoint pairs satisfying relative abundance and nefness conditions. These are applied to generic vanishing and weak positivity.

代数几何 · 数学 2024-07-24 Fanjun Meng

The paper proposes and motivates a conjecture on the invariance of cohomological support loci under derived equivalence. It contains a proof in the case of surfaces, and explains further developments and consequences.

代数几何 · 数学 2012-03-22 Mihnea Popa

We describe the foundation of the log minimal model program for log canonical pairs according to Ambro's idea. We generalize Koll\'ar's vanishing and torsion-free theorems for embedded simple normal crossing pairs. Then we prove the cone…

代数几何 · 数学 2009-07-10 Osamu Fujino

In this article we prove a non-vanishing statement, as well as several properties of metrics with minimal singularities of adjoint bundles. Our arguments involve many ideas from Y.-T. Siu's analytic proof of the finite generation of the…

复变函数 · 数学 2008-07-22 Mihai Paun

We give a reduction of the irregular case for the effective non-vanishing conjecture by virtue of the Fourier-Mukai transform. As a consequence, we reprove that the effective non-vanishing conjecture holds on algebraic surfaces.

代数几何 · 数学 2008-02-27 Qihong Xie

In this note we give an extended version of Combinatorial Nullstellensatz, with weaker assumption on nonvanishing monomial. We also present an application of our result in a situation where the original theorem does not seem to work.

组合数学 · 数学 2021-12-07 Michał Lasoń

We prove that Grothendieck's Hodge standard conjecture holds for abelian varieties in arbitrary characteristic if the Hodge conjecture holds for complex abelian varieties of CM-type. For abelian varieties with no exotic algebraic classes,…

代数几何 · 数学 2007-05-23 J. S. Milne

We prove some non-vanishing results of Hilbert Poincar\'e series. We derive these results, by showing that the Fourier coefficients of Hilbert Poincar\'e series satisfy some nice orthogonality relations for sufficiently large weight as well…

数论 · 数学 2018-06-26 Moni Kumari

Let $(X/Z,B+A)$ be a $\Q$-factorial dlt pair where $B,A\ge 0$ are $\Q$-divisors and $K_X+B+A\sim_\Q 0/Z$. We prove that any LMMP$/Z$ on $K_X+B$ with scaling of an ample$/Z$ divisor terminates with a good log minimal model or a Mori fibre…

代数几何 · 数学 2012-04-25 Caucher Birkar

We find an elementary proof for Voiculescu's theorem on the polar decomposition of circular variables.

量子代数 · 数学 2013-01-30 Teodor Banica

We prove some basic properties of the relative Nakayama-Zariski decomposition. We apply them to the study of lc generalized pairs. We prove the existence of log minimal models or Mori fiber spaces for (relative) lc generalized pairs…

代数几何 · 数学 2023-05-23 Jihao Liu , Lingyao Xie

A new generalization of the classical separate algebraicity theorem is suggested and proved.

alg-geom · 数学 2008-02-03 R. A. Sharipov , E. N. Tzyganov

We show that any Fano fivefold with canonical Gorenstein singularities has an effective anticanonical divisor. Moreover,if a general element of the anticanonical system is reduced, then it has canonical singularities. We also prove…

代数几何 · 数学 2020-02-10 Andreas Höring , Robert Śmiech

In this paper we prove a generalization of famous Larchr's theorem concerning good lattice points.

数论 · 数学 2012-03-15 Dmitry Ushanov

We prove the consistency of a strong polarized relation for a cardinal and its successor, using pcf and forcing

逻辑 · 数学 2018-04-26 Shimon Garti , Saharon Shelah

We prove a generalization of Lopes's theorem, that is, of the converse of Brolin's theorem.

动力系统 · 数学 2018-08-21 Yusuke Okuyama , Malgorzata Stawiska

We establish an analogue of the Goldbach conjecture for Laurent polynomials with positive integer coefficients.

数论 · 数学 2023-12-05 Sophia Liao , Harold Polo