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We give a mathematical structure on an arithmetic surface, that has algebraic meanings over finite places and can estimate the canonical norm for a relative differential form on the arithmetic surface. This will give a lower bound for the…

代数几何 · 数学 2015-08-10 Yuhan Zha

We prove the finite generation of canonical rings of projective variety of general type defined over complex numbers.

代数几何 · 数学 2007-05-23 Hajime Tsuji

We investigate the variation of log canonical thresholds in (graded) linear systems. For toric log Fano varieties, we give a sharp lower bound for log canonical thresholds of the anticanonical members in terms of the global minimal log…

代数几何 · 数学 2014-11-12 Florin Ambro

A family $f_t(z)$ of polynomials over a number field $K$ will be called \emph{weighted homogeneous} if and only if $f_t(z)=F(z^e, t)$ for some binary homogeneous form $F(X, Y)$ and some integer $e\geq 2$. For example, the family $z^d+t$ is…

数论 · 数学 2017-06-14 Patrick Ingram

In this note, we propose the modular height of an abelian variety defined over a field of finite type over Q. Moreover, we prove its finiteness property.

数论 · 数学 2007-05-23 Atsushi Moriwaki

We prove height bounds concerning intersections of finitely generated subgroups in a torus with algebraic subvarieties, all varying in a pencil. This vastly extends the previously treated constant case and involves entirely different, and…

数论 · 数学 2017-10-18 F. Amoroso , D. Masser , U. Zannier

We consider a canonical bundle formula for generically finite proper surjective morphisms and obtain subadjunction formulae for minimal log canonical centers of log canonical pairs. We also treat related topics and applications.

代数几何 · 数学 2010-09-22 Osamu Fujino , Yoshinori Gongyo

Let (X,D) be a projective log pair over the ring of integers of a number field such that the log canonical line bundle K_(X,D) or its dual -K_(X,D) is relatively ample. We introduce a canonical height of K_(X,D) (and -K(X,D)) which is…

数论 · 数学 2024-07-01 Rolf Andreasson , Robert J. Berman

In this note, we construct three new infinite families of surfaces of general type with canonical map of degree 2 onto a surface of general type. For one of these families the canonical system has base points.

代数几何 · 数学 2019-08-01 Nguyen Bin

We establish the existence of de Rham lifts of Langlands parameters (or Galois representations) for unitary, orthogonal and symplectic (similitude) groups of arbitrary rank. Our results are unconditional except for the assumption $p>2$.

数论 · 数学 2025-09-04 Zhongyipan Lin

We study families of varieties endowed with polarized canonical eigensystems of several maps, inducing canonical heights on the dominating variety as well as on the "good" fibers of the family. We show explicitely the dependence on the…

数论 · 数学 2017-08-01 Jorge Mello

Shokurov conjectured that the set of all log canonical thresholds on varieties of bounded dimension satisfies the ascending chain condition. In this paper we prove that the conjecture holds for log canonical thresholds on smooth varieties…

代数几何 · 数学 2019-12-19 Tommaso de Fernex , Lawrence Ein , Mircea Mustata

We establish an upper bound for the sectional genus of varieties which are invariant under Pfaff fields on projective spaces.

代数几何 · 数学 2011-02-14 Maurício Corrêa , Marcos Jardim

We prove invariance results for the cohomology groups of ideal sheaves of simple normal crossing divisors under (a restricted class of) birational morphisms of pairs in arbitrary characteristic, assuming a conjecture regarding the existence…

代数几何 · 数学 2023-10-17 Charles Godfrey

In this article we prove the existence of a canonical theta structure for the canonical lift of an ordinary abelian variety.

数论 · 数学 2007-05-23 Robert Carls

We give an algorithm which requires no integer factorization for computing the canonical height of a point in $\mathbb{P}^1(\mathbb{Q})$ relative to a morphism $\phi: \mathbb{P}_{\mathbb{Q}}^1 \rightarrow \mathbb{P}_{\mathbb{Q}}^1$ of…

数论 · 数学 2016-02-17 Elliot Wells

Call and Silverman introduced the canonical height associated to a polarized dynamical system, that is, an endomorphism of a projective variety and an ample line bundle which pulls back to a tensor power of itself. They also presented an…

数论 · 数学 2021-04-28 Patrick Ingram

Canonical functions are a powerful concept with numerous applications in the study of groups, monoids, and clones on countable structures with Ramsey-type properties. In this short note, we present a proof of the existence of canonical…

组合数学 · 数学 2020-07-28 Manuel Bodirsky , Michael Pinsker

In this paper, we construct counterexamples to the boundedness of generalised log canonical models of surfaces with fixed appropriate invariants, where the underlying varieties can have arbitrary Kodaira dimension. This answers a question…

代数几何 · 数学 2025-04-10 Christopher Hacon , Xiaowei Jiang

We study equivariant real structures on spherical varieties. We call such a structure canonical if it is equivariant with respect to the involution defining the split real form of the acting reductive group G. We prove the existence and…

代数几何 · 数学 2014-11-21 D. Akhiezer , S. Cupit-Foutou