Khái niệm cốt lõi
Efficient algorithm for solving nonlinear PDEs using sparse Cholesky factorization with Gaussian processes.
Tóm tắt
The article introduces a near-linear complexity algorithm for working with kernel matrices in solving nonlinear PDEs. It focuses on the sparse Cholesky factorization algorithm, theoretical studies, and numerical experiments. The content is structured into sections covering the introduction, solving nonlinear PDEs via GPs, the sparse Cholesky factorization algorithm, theoretical study, second-order optimization methods, numerical experiments, conclusions, acknowledgments, references, and appendices.
Introduction
- Machine learning and probabilistic inference have gained popularity for automating computational problem solutions.
- Gaussian processes offer a promising approach combining theoretical rigor with flexible design.
- The article investigates the computational efficiency of GPs and kernel methods in solving nonlinear PDEs.
Solving Nonlinear PDEs via GPs
- Gaussian processes are used to automate the solution of computational problems.
- The methodology transforms nonlinear PDEs into quadratic optimization problems.
- The GP framework is applied to solve a prototypical nonlinear elliptic equation.
The Sparse Cholesky Factorization Algorithm
- Presents a near-linear complexity algorithm for working with kernel matrices.
- Utilizes a sparse Cholesky factorization algorithm based on near-sparsity.
- Employs Vecchia approximation of GPs for computing approximate factors.
Theoretical Study
- Sets up rigorous results for kernels, physical points, and measurements.
- Assumptions and conditions for the operator L are defined.
- Kernel function described as the Green function with examples like Matérn-like kernels.
Further sections cover second-order optimization methods, numerical experiments, conclusions, acknowledgments, references, and appendices.
Thống kê
Die primäre Zielsetzung des Papiers besteht darin, einen Algorithmus mit nahezu linearer Komplexität für die Arbeit mit Kernelmatrizen bereitzustellen.
Der Algorithmus basiert auf der spärlichen Cholesky-Faktorisierung von Matrizen.
Es wird eine effiziente Methode zur Lösung allgemeiner nichtlinearer partieller Differentialgleichungen mit GPs und Kernelmethoden präsentiert.
Trích dẫn
"Wir bieten einen schnellen, skalierbaren und genauen Lösungsweg für allgemeine partielle Differentialgleichungen mit GPs und Kernelmethoden."