Block triangular preconditioning for stochastic Galerkin method
Journal of Computational and Applied Mathematics(2022)
摘要
In this paper, we develop a new block triangular preconditioner for solving partial differential equations with random coefficients. We prove spectral bounds for the preconditioned system. Several numerical examples are provided to demonstrate the efficiency of this preconditioner, especially for stochastic problems with large variance.
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关键词
Stochastic Galerkin method,Polynomial chaos,Block triangular preconditioner,Multigrid
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