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In this paper, we define two matrices named as "difference matrices", denoted by $D$ and $DD$ which significantly contribute to achieve regular single-edge QC-LDPC codes with the shortest length and the certain girth as well as regular and…

信息论 · 计算机科学 2017-09-05 Farzane Amirzade , Mohammad-Reza Sadeghi

We study discrepancy minimization for vectors in $\mathbb{R}^n$ under various settings. The main result is the analysis of a new simple random process in multiple dimensions through a comparison argument. As corollaries, we obtain bounds…

数据结构与算法 · 计算机科学 2020-08-07 Ryan Alweiss , Yang P. Liu , Mehtaab Sawhney

In this paper, we prove the conic version of YTD conjecture on log Fano manifolds.

微分几何 · 数学 2019-04-01 Gang Tian , Feng Wang

We consider adaptive increasingly rare Markov chain Monte Carlo (MCMC) algorithms, which are adaptive MCMC methods, where the adaptation concerning the "past'' happens less and less frequently over time. Under a contraction assumption with…

We prove the existence of flips in dimension n, contingent on the termination of real flips in dimension n-1.

代数几何 · 数学 2007-05-23 Christopher Hacon , James McKernan

The Lorentz-violating isotropic modified Maxwell theory minimally coupled to standard Dirac theory is characterized by a single real dimensionless parameter which is taken to vanish for the case of the standard (Lorentz-invariant) theory. A…

高能物理 - 理论 · 物理学 2011-04-05 F. R. Klinkhamer , M. Schreck

We give a framework for generalizing LDPC code constructions that use Transversal Designs or related structures such as mutually orthogonal Latin squares. Our construction offers a broader range of code lengths and codes rates. Similar…

组合数学 · 数学 2022-05-03 Diane Donovan , Asha Rao , Elif Üsküplü , E. Ş. Yazıcı

In this note, we will show that delta invariant of a log Fano pair can be approximated by lc places of complements of plt type if it is no greater than one. Give a log Fano pair with delta invariant no greater than one, under the assumption…

代数几何 · 数学 2021-08-03 Chuyu Zhou

In 2004, de Mathan and Teuli\'e stated the $p$-adic Littlewood Conjecture ($p$-$LC$) in analogy with the classical Littlewood Conjecture. Given a field $\mathbb{K}$ and an irreducible polynomial $p(t)$ with coefficients in $\mathbb{K}$,…

数论 · 数学 2025-04-09 Samuel Garrett , Steven Robertson

A higher-order change-of-measure multilevel Monte Carlo (MLMC) method is developed for computing weak approximations of the invariant measures of SDE with drift coefficients that do not satisfy the contractivity condition. This is achieved…

数值分析 · 数学 2024-03-12 Sankarasubramanian Ragunathan , Håkon Andreas Hoel

It is conjectured that for fixed $A$, $r \ge 1$, and $d \ge 1$, there is a uniform bound on the size of the torsion submodule of a Drinfeld $A$-module of rank $r$ over a degree $d$ extension $L$ of the fraction field $K$ of $A$. We verify…

数论 · 数学 2016-09-06 Bjorn Poonen

We formulate a comparison of minimal log discrepancies of a variety and its ambient space with appropriate boundaries in terms of motivic integration. It was obtained also by Ein and Musta\c{t}\v{a} independently.

代数几何 · 数学 2007-05-23 Masayuki Kawakita

In this paper, we study the singularities of a pair (X,Y) in arbitrary characteristic via jet schemes. For a smooth variety X in characteristic 0, Ein, Lazarsfeld and Mustata showed that there is a correspondence between irreducible closed…

代数几何 · 数学 2013-08-27 Zhixian Zhu

The Swampland Distance Conjecture (SDC) states that, as we move towards an infinite distance point in moduli space, a tower of states becomes exponentially light with the geodesic distance in any consistent theory of Quantum Gravity.…

高能物理 - 理论 · 物理学 2024-01-11 José Calderón-Infante , Alberto Castellano , Alvaro Herráez , Luis E. Ibáñez

We prove that for each positive integer $n$ there exists a positive number $\epsilon_n$ so that $n$-dimensional toric quotient singularities satisfy the ACC for mld's on the interval $(0,\epsilon_n)$. In the course of the proof, we will…

代数几何 · 数学 2020-09-01 Joaquín Moraga

We describe the set of minimal log discrepancies of toric log varities, and study its accumulation points.

代数几何 · 数学 2007-05-23 Florin Ambro

In this paper, we define potential log canonical threshold and prove that the set of those thresholds satisfies the ascending chain condition (ACC). We also consider collections of sequences of Fano type varieties and we study their basic…

代数几何 · 数学 2023-08-21 Sung Rak Choi , Sungwook Jang

We prove in the case of minimal Fano threefolds a conjecture stated by Dubrovin at the ICM 1998 in Berlin. The conjecture predicts that the symmetrized/alternated Euler characteristic pairing on $K_0$ of a Fano variety with an exceptional…

代数几何 · 数学 2008-03-04 V. Golyshev

In this work we investigate unions of lifted MRD codes of a fixed dimension and minimum distance and derive an explicit formula for the cardinality of such codes. This will then imply a lower bound on the cardinality of constant dimension…

信息论 · 计算机科学 2013-01-10 Anna-Lena Trautmann

A completion of an m-by-n matrix A with entries in {0,1,*} is obtained by setting all *-entries to constants 0 or 1. A system of semi-linear equations over GF(2) has the form Mx=f(x), where M is a completion of A and f:{0,1}^n --> {0,1}^m…

计算复杂性 · 计算机科学 2012-04-18 S. Jukna , G. Schnitger