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The transfer matrix method is applied to quasi one-dimensional and one-dimensional disordered systems with long-range interactions, described by band random matrices. We investigate the convergence properties of the whole Lyapunov spectra…

无序系统与神经网络 · 物理学 2007-05-23 T. Kottos , A. Politi , F. M. Izrailev

This paper aims at showing the stability of the recovery of a smooth planar domain with a real algebraic boundary from a finite number of its generalized polarization tensors. It is a follow-up of the work [H. Ammari et al., Math. Annalen,…

偏微分方程分析 · 数学 2019-05-07 Habib Ammari , Mihai Putinar , Andries Steekamp , Faouzi Triki

We consider a wide variety of scattering problems including scattering by Dirichlet, Neumann, and penetrable obstacles. We consider a radial perfectly-matched layer (PML) and show that for any PML width and a steep-enough scaling angle, the…

偏微分方程分析 · 数学 2023-01-31 Jeffrey Galkowski , David Lafontaine , Euan A. Spence

We prove that a random linear code over F_q, with probability arbitrarily close to 1, is list decodable at radius (1-1/q-\epsilon) with list size L=O(1/\epsilon^2) and rate R=\Omega_q(\epsilon^2/(log^3(1/\epsilon))). Up to the…

信息论 · 计算机科学 2012-07-06 Mahdi Cheraghchi , Venkatesan Guruswami , Ameya Velingker

We study algebraic isomonodromic deformations of flat logarithmic connections on the Riemann sphere with $n\geq 4$ poles, for arbitrary rank. We introduce a natural property of algebraizability for the germ of universal deformation of such…

代数几何 · 数学 2016-03-01 Gaël Cousin

In this paper, we consider convergence properties of a second order Markov chain. Similar to a column stochastic matrix is associated to a Markov chain, a so called {\em transition probability tensor} $P$ of order 3 and dimension $n$ is…

数值分析 · 数学 2013-07-29 Shenglong Hu , Liqun Qi

The problems on the location of the matrix spectrum inside or outside domains bounded by ellipses or parabolas are studied. Special Lyapunov-type equations are connected with these problems. Theorems about the unique solvability of such…

经典分析与常微分方程 · 数学 2023-12-20 G. V. Demidenko , Z. Wang

The scattering theory of the integrable statistical models can be generalized to the case of systems with extended lines of defect. This is done by adding the reflection and transmission amplitudes for the interactions with the line of…

高能物理 - 理论 · 物理学 2009-10-28 G. Delfino , G. Mussardo , P. Simonetti

In this paper, we prove the following non-linear generalization of the classical Sylvester-Gallai theorem. Let $\mathbb{K}$ be an algebraically closed field of characteristic $0$, and $\mathcal{F}=\{F_1,\cdots,F_m\} \subset…

交换代数 · 数学 2023-10-09 Rafael Oliveira , Akash Kumar Sengupta

The Zarantonello fixed-point iteration is an established linearization scheme for quasilinear PDEs with strongly monotone and Lipschitz continuous nonlinearity in Hilbert spaces. This paper presents a weighted least-squares minimization for…

数值分析 · 数学 2026-02-24 Philipp Bringmann , Dirk Praetorius

In this article, a new unified duality theory is developed for Petrov-Galerkin finite element methods. This novel theory is then used to motivate goal-oriented adaptive mesh refinement strategies for use with discontinuous Petrov-Galerkin…

数值分析 · 数学 2019-12-24 Brendan Keith , Ali Vaziri Astaneh , Leszek Demkowicz

We study the enumerative geometry of stable maps to Calabi-Yau 5-folds $Z$ with a group action preserving the Calabi-Yau form. In the central case $Z=X \times \mathbb{C}^2$, where $X$ is a Calabi-Yau 3-fold with a group action scaling the…

代数几何 · 数学 2024-10-02 Andrea Brini , Yannik Schuler

Lipshitz and Sarkar recently introduced a space-level refinement of Khovanov homology. This refinement induces a Steenrod square operation $\Sq^2$ on Khovanov homology which they describe explicitly. This paper presents some computations of…

几何拓扑 · 数学 2012-10-09 Cotton Seed

A one-dimensional discrete Stark Hamiltonian with a continuous electric field is constructed by extension theory methods. In absence of the impurities the model is proved to be exactly solvable, the spectrum is shown to be simple,…

量子物理 · 物理学 2009-10-30 L. A. Dmitrieva , Yu. A. Kuperin , Yu. B. Melnikov

We consider a one-parameter family of beam equations with Hamiltonian non-linearity in one space dimension under periodic boundary conditions. In a unified functional framework we study the long time evolution of initial data in two…

偏微分方程分析 · 数学 2022-12-12 Roberto Feola , Jessica Elisa Massetti

This paper presents a one-dimensional analog of the Rectangular-Polar (RP) integration strategy and its convergence analysis for weakly singular convolution integrals. The key idea of this method is to break the whole integral into integral…

数值分析 · 数学 2025-01-15 Krishna Yamanappa Poojara , Sabhrant Sachan , Ambuj Pandey

In this paper, we investigate $C^1$ isospectral deformations of the ellipse with Robin boundary conditions, allowing both the Robin function and domain to deform simultaneously. We prove that if the deformations preserve the reflectional…

偏微分方程分析 · 数学 2020-01-07 Amir Vig

We solve principal component regression (PCR), up to a multiplicative accuracy $1+\gamma$, by reducing the problem to $\tilde{O}(\gamma^{-1})$ black-box calls of ridge regression. Therefore, our algorithm does not require any explicit…

机器学习 · 统计学 2017-04-26 Zeyuan Allen-Zhu , Yuanzhi Li

Linearization is a widely used method for solving polynomial eigenvalue problems (PEPs) and rational eigenvalue problem (REPs) in which the PEP/REP is transformed to a generalized eigenproblem and then solve this generalized eigenproblem…

数值分析 · 数学 2023-05-23 Ranjan Kumar Das , Harish K. Pillai

We show that, after the change of variables $q=e^{iu}$, refined floor diagrams for $\mathbb{P}^2$ and Hirzebruch surfaces compute generating series of higher genus relative Gromov-Witten invariants with insertion of a lambda class. The…

代数几何 · 数学 2021-06-08 Pierrick Bousseau