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We characterize a $k$-th accumulation point of pseudo-effective thresholds of $n$-dimensional varieties as certain invariant associates to a numerically trivial pair of an $(n-k)$-dimensional variety. This characterization is applied…

代数几何 · 数学 2020-11-05 Jingjun Han , Zhan Li

We prove Fujita's spectrum conjecture on the discreteness of pseudo-effective thresholds for polarized varieties.

代数几何 · 数学 2018-01-09 Gabriele Di Cerbo

We prove that the set of accumulation points of thresholds in dimension three is equal to the set of thresholds in dimension two, excluding one.

代数几何 · 数学 2007-05-23 James McKernan , Yuri Prokhorov

We prove Fujita's log spectrum conjecture. It follows from the ACC of a suitable set of pseudo-effective thresholds.

代数几何 · 数学 2012-12-04 Gabriele Di Cerbo

We show Fujita's spectrum conjecture for $\epsilon$-log canonical pairs and Fujita's log spectrum conjecture for log canonical pairs. Then, we generalize the pseudo-effective threshold of a single divisor to multiple divisors and establish…

代数几何 · 数学 2017-06-21 Jingjun Han , Zhan Li

Let X be a smooth complex projective variety of dimension n. We prove bounds on Fujita's basepoint freeness conjecture that grow as nloglog(n).

代数几何 · 数学 2021-08-03 Luca Ghidelli , Justin Lacini

We give a topological characterization of the n-dimensional pseudo-boundary of the (2n+1)-dimensional Euclidean space.

一般拓扑 · 数学 2007-05-23 Alex Chigogidze , M. M. Zarichnyi

Let A be a subset of the real line. We study the fractal dimensions of the k-fold iterated sumsets kA, defined as kA = A+...+A (k times). We show that for any non-decreasing sequence {a_k} taking values in [0,1], there exists a compact set…

经典分析与常微分方程 · 数学 2013-03-21 Jörg Schmeling , Pablo Shmerkin

We study $l$-very ample, ample and semi-ample divisors on the blown-up projective space $\mathbb{P}^n$ in a collection of points in general position. We establish Fujita's conjectures for all ample divisors with the number of points bounded…

代数几何 · 数学 2017-09-18 Olivia Dumitrescu , Elisa Postinghel

We show that for a transcendental entire function the set of points whose orbit under iteration is bounded can have arbitrarily small positive Hausdorff dimension.

动力系统 · 数学 2012-02-14 Walter Bergweiler

Let $\Delta_k(n)$ denote the simplicial complex of $(k+1)$-crossing-free subsets of edges in $\binom{[n]}{2}$. Here $k,n\in \mathbb N$ and $n\ge 2k+1$. Jonsson (2003) proved that (neglecting the short edges that cannot be part of any…

组合数学 · 数学 2025-05-13 Luis Crespo Ruiz , Francisco Santos

In this paper, we prove the cohomological Lichtenbaum conjecture of abelian extensions of imaginary quadratic fields up to a finite set of bad primes.

数论 · 数学 2021-12-24 Chaochao Sun

We propose a conjectural list of Fano manifolds of Picard number $1$ with pseudoeffective normalized tangent bundles, which we prove in various situations by relating it to the complete divisibility conjecture of Russo and Zak on varieties…

代数几何 · 数学 2022-06-09 Baohua Fu , Jie Liu

An extremal point of a positive threshold Boolean function $f$ is either a maximal zero or a minimal one. It is known that if $f$ depends on all its variables, then the set of its extremal points completely specifies $f$ within the universe…

组合数学 · 数学 2017-06-07 Vadim Lozin , Igor Razgon , Viktor Zamaraev , Elena Zamaraeva , Nikolai Yu. Zolotykh

We apply a conjectured inequality on third chern classes of stable two-term complexes on threefolds to Fujita's conjecture. More precisely, the inequality is shown to imply a Reider-type theorem in dimension three which in turn implies that…

代数几何 · 数学 2013-07-16 Arend Bayer , Aaron Bertram , Emanuele Macri , Yukinobu Toda

Consider any Dirichlet series sum a_n/n^z with nonnegative coefficients a_n and finite sum function f(z)=f(x+iy) when x is greater than 1. Denoting the partial sum a_1+...+a_N by s_N, the paper gives the following necessary and sufficient…

数论 · 数学 2008-07-04 Jacob Korevaar

In this paper, we prove that the Fourier entropy of an $n$-dimensional boolean function $f$ can be upper-bounded by $O(I(f)+ \sum\limits_{k\in[n]}I_k(f)\log \frac{1}{I_k(f)})$, where $I(f)$ is its total influence and $I_k(f)$ is the…

组合数学 · 数学 2025-12-11 Xiao Han

Let $X$ be an irreducible Hermitian symmetric space of compact type (IHSS for short). In this paper, we give the irreducible decomposition of $Sym^r T_X$. As a by-product, we give a cohomological characterization of the rank of $X$.…

代数几何 · 数学 2023-08-15 Feng Shao

In this note we establish a new Fujita-type effective bound for the base point freeness of adjoint line bundles on a compact complex projective manifold of complex dimension $n$. The bound we obtain (approximately) differs from the linear…

代数几何 · 数学 2007-05-23 Gordon Heier

In this paper, we will give an upper bound of the number of auxiliary hypersurfaces in the determinant method, which reformulates an unpublished work of Salberger by Arakelov geometry. One of the key constants will be determined by the…

数论 · 数学 2021-05-12 Chunhui Liu
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