Results 1 to 10 of about 21,785,520 (294)

Universal topology of exceptional points in nonlinear non-Hermitian systems [PDF]

open access: yesNature Communications
Exceptional points are non-Hermitian degeneracies where eigenvalues and eigenvectors coalesce, giving rise to unusual physical effects across scientific disciplines.
Nai-Hang Kwong   +6 more
doaj   +2 more sources

On the Solution of the Dirichlet Problem for Second-Order Elliptic Systems in the Unit Disk

open access: yesMathematics, 2023
The role played by explicit formulas for solving boundary value problems for elliptic equations and systems is well known. In this paper, explicit formulas for a general solution of the Dirichlet problem for second-order elliptic systems in the unit disk
Astamur Bagapsh, Alexandre Soldatov
doaj   +1 more source

A Comparison of Parallel Algorithms for Numerical Solution of Parabolic Problems with Fractional Power Elliptic Operators

open access: yesAxioms, 2022
In this article we construct parallel solvers analyze the efficiency and accuracy of general parallel solvers for three dimensional parabolic problems with the fractional power of elliptic operators.
Raimondas Čiegis   +2 more
doaj   +1 more source

High-precision quantum algorithms for partial differential equations [PDF]

open access: yesQuantum, 2021
Quantum computers can produce a quantum encoding of the solution of a system of differential equations exponentially faster than a classical algorithm can produce an explicit description.
Andrew M. Childs   +2 more
doaj   +1 more source

The explicit solution of the Neumann boundary value problem for Bauer differential equation in circular domains [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2021
The article is devoted to the boundary value problem of Neumann problem's type for solutions of one second-order elliptic differential equation.
Rasulov, Karim Magomedovich   +1 more
doaj   +1 more source

Uniqueness theorem for partially observed elliptic systems and application to asymptotic synchronization

open access: yesComptes Rendus. Mathématique, 2020
We show that under Kalman’s rank condition, the observability of a scalar equation implies the uniqueness of solution to a system of elliptic operators.
Li, Tatsien, Rao, Bopeng
doaj   +1 more source

On nonnegative radial entire solutions of second order quasilinear elliptic systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2002
In this article we consider the second order quasilinear elliptic system of the form $$\Delta_{p_i} u_i=H_i(|x|)u_{i+1}^{\alpha_i}, x\in \mathbb{R}^N, i=1,2,...,m$$ with nonnegative continuous function $H_i$.
T. Teramoto
doaj   +1 more source

Singular Integral Operators and Elliptic Boundary-Value Problems. I

open access: yesСовременная математика: Фундаментальные направления, 2017
The book consists of three Parts I-III and Part I is presented here. In this book, we develop a new approach mainly based on the authors papers. Many results are published here for the first time. Chapter 1 is introductory.
Alexandre P Soldatov
doaj   +1 more source

Existence of Three Solutions for Nonlinear Operator Equations and Applications to Second-Order Differential Equations

open access: yesJournal of Function Spaces, 2021
The existence of three solutions for nonlinear operator equations is established via index theory for linear self-adjoint operator equations, critical point reduction method, and three critical points theorems obtained by Brezis-Nirenberg, Ricceri, and ...
Mingliang Song, Shuyuan Mei
doaj   +1 more source

Slate: extending Firedrake's domain-specific abstraction to hybridized solvers for geoscience and beyond [PDF]

open access: yesGeoscientific Model Development, 2020
Within the finite element community, discontinuous Galerkin (DG) and mixed finite element methods have become increasingly popular in simulating geophysical flows.
T. H. Gibson   +3 more
doaj   +1 more source

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