
Accession Number : ADA113769
Title : Another Strategy for Fast 'Poisson' Solving with NonConstant Coefficients.
Descriptive Note : Memorandum rept.,
Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC
Personal Author(s) : Boris,J P
PDF Url : ADA113769
Report Date : 09 Apr 1982
Pagination or Media Count : 8
Abstract : The key to fast Poisson solving in an extended domain is nonlocal residual error dispersal. The fastest, most stable iterations are obtained when 'most' of the nonconstantcoefficient elliptic operator can be inverted implicitly . Although local inversion approaches (ICCG, SOR, etc.) are workable, there are good incentives to seek computationally inexpensive nonlocal techniques whose worst case convergence is expected to be far better than for local inverse techniques. This note presents one such approach for a useful class of variable coefficient problems. (Author)
Descriptors : *Poisson equation, *Coefficients, Strategy, Fourier transformation, Errors, Iterations, Inversion, Variables, Finite difference theory, Two dimensional, Global, Dispersing, Residuals, Algorithms, Stability
Subject Categories : Theoretical Mathematics
Distribution Statement : APPROVED FOR PUBLIC RELEASE