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We prove convergence for the nonoverlapping Robin-Robin method applied to nonlinear elliptic equations with a $p$-structure, including degenerate diffusion equations governed by the $p$-Laplacian. This nonoverlapping domain decomposition is…

Numerical Analysis · Mathematics 2021-05-04 Emil Engström , Eskil Hansen

We analyse parallel overlapping Schwarz domain decomposition methods for the Helmholtz equation, where the subdomain problems satisfy first-order absorbing (impedance) transmission conditions, and exchange of information between subdomains…

Numerical Analysis · Mathematics 2022-09-07 Shihua Gong , Martin J. Gander , Ivan G. Graham , David Lafontaine , Euan A. Spence

This paper presents and evaluates an approach for coupling together subdomain-local reduced order models (ROMs) constructed via non-intrusive operator inference (OpInf) with each other and with subdomain-local full order models (FOMs),…

Numerical Analysis · Mathematics 2024-10-15 Ian Moore , Christopher Wentland , Anthony Gruber , Irina Tezaur

Non-overlapping Schwarz methods with generalized Robin transmission conditions were originally introduced by B. Despr\'es for time-harmonic wave propagation problems and have largely developed over the past thirty years. The aim of the…

Numerical Analysis · Mathematics 2022-04-08 Clemens Pechstein

This paper is concerned with global-in-time, nonoverlapping domain decomposition methods for the mixed formulation of the diffusion problem. Two approaches are considered: one uses the time-dependent Steklov-Poincar\'e operator and the…

Numerical Analysis · Mathematics 2013-12-30 Thi Thao Phuong Hoang , Jérôme Jaffré , Caroline Japhet , Michel Kern , Jean Roberts

This paper proposes a domain decomposition subspace neural network method for efficiently solving linear and nonlinear partial differential equations. By combining the principles of domain decomposition and subspace neural networks, the…

Numerical Analysis · Mathematics 2025-05-28 Zhenxing Fu , Hongliang Liu , Zhiqiang Sheng , Baixue Xing

In this article, we analyse the convergence behaviour and scalability properties of the one-level Parallel Schwarz method (PSM) for domain decomposition problems in which the boundaries of many subdomains lie in the interior of the global…

Numerical Analysis · Mathematics 2019-10-21 Gabriele Ciaramella , Muhammad Hassan , Benjamin Stamm

This work investigates transmission conditions for the domain decomposition-based coupling of subdomain-local models using the non-overlapping Schwarz alternating method (NO-SAM). Building on prior efforts involving overlapping SAM (O-SAM),…

Numerical Analysis · Mathematics 2025-10-06 Cameron Rodriguez , Irina Tezaur , Alejandro Mota , Anthony Gruber , Eric Parish , Christopher Wentland

Two-level domain decomposition preconditioners lead to fast convergence and scalability of iterative solvers. However, for highly heterogeneous problems, where the coefficient function is varying rapidly on several possibly non-separated…

Numerical Analysis · Mathematics 2022-07-13 Alexander Heinlein , Kathrin Smetana

In this paper, we develop a domain decomposition method for the nonlinear Poisson-Boltzmann equation based on a solvent-excluded surface widely used in computational chemistry. The model relies on a nonlinear equation defined in…

Numerical Analysis · Mathematics 2024-04-08 Abhinav Jha , Benjamin Stamm

We propose a component-based (CB) parametric model order reduction (pMOR) formulation for parameterized nonlinear elliptic partial differential equations (PDEs) based on overlapping subdomains. Our approach reads as a constrained…

Numerical Analysis · Mathematics 2022-12-21 Angelo Iollo , Giulia Sambataro , Tommaso Taddei

We study overlapping Schwarz methods for the Helmholtz equation posed in any dimension with large, real wavenumber and smooth variable wave speed. The radiation condition is approximated by a Cartesian perfectly-matched layer (PML). The…

Numerical Analysis · Mathematics 2024-04-03 Jeffrey Galkowski , Shihua Gong , Ivan G. Graham , David Lafontaine , Euan A. Spence

This paper introduces a novel approach to analyzing overlapping Schwarz methods for N\'{e}d\'{e}lec and Raviart--Thomas vector field problems. The theory is based on new regular stable decompositions for vector fields that are robust to the…

Numerical Analysis · Mathematics 2024-04-19 Duk-Soon Oh , Shangyou Zhang

We analyze the convergence of the one-level overlapping domain decomposition preconditioner SORAS (Symmetrized Optimized Restricted Additive Schwarz) applied to a generic linear system whose matrix is not necessarily symmetric/self-adjoint…

Numerical Analysis · Mathematics 2024-08-06 Marcella Bonazzoli , Xavier Claeys , Frédéric Nataf , Pierre-Henri Tournier

We present Nystr\"om discretizations of multitrace formulations and non-overlapping Domain Decomposition Methods (DDM) for the solution of Helmholtz transmission problems for bounded composite scatterers with piecewise constant material…

Numerical Analysis · Mathematics 2017-10-11 Carlos Jerez-Hanckes , Carlos Pérez-Arancibia , Catalin Turc

We design and analyze a new non-conforming domain decomposition method based on Schwarz type approaches that allows for the use of Robin interface conditions on non-conforming grids. The method is proven to be well posed, and the iterative…

Numerical Analysis · Mathematics 2007-05-23 Caroline Japhet , Yvon Maday , Frédéric Nataf

Nonlinear Schwarz methods are a type of nonlinear domain decomposition method used as an alternative to Newton's method for solving discretized nonlinear partial differential equations. In this article, the first parallel implementation of…

Numerical Analysis · Mathematics 2026-03-26 Kyrill Ho , Axel Klawonn , Martin Lanser

We propose an efficient algorithm that combines overlapping domain decomposition and proper generalized decomposition (PGD) to construct surrogate models of linear elliptic parametric problems. The technique is composed of an offline and an…

Numerical Analysis · Mathematics 2024-09-16 Marco Discacciati , Ben J. Evans , Matteo Giacomini

In this paper, we propose and analyze an additive domain decomposition method (DDM) for solving the high-frequency Helmholtz equation with the Sommerfeld radiation condition. In the proposed method, the computational domain is partitioned…

Numerical Analysis · Mathematics 2020-03-06 Wei Leng , Lili Ju

Schwarz methods use a decomposition of the computational domain into subdomains and need to put boundary conditions on the subdomain boundaries. In domain truncation one restricts the unbounded domain to a bounded computational domain and…

Numerical Analysis · Mathematics 2022-07-21 Martin J. Gander , Hui Zhang