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Optimal-order nonnested multigrid methods for solving finite element equations. II. On nonquasiuniform meshes


Author: Shangyou Zhang
Journal: Math. Comp. 55 (1990), 439-450
MSC: Primary 65N55; Secondary 65F10, 65N30
DOI: https://doi.org/10.1090/S0025-5718-1990-1035947-0
MathSciNet review: 1035947
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Abstract: Nonnested multigrid methods are proved to be optimal-order solvers for finite element equations arising from elliptic problems in the presence of singularities caused by re-entrant corners and abrupt changes in the boundary conditions, where the multilevel grids are appropriately refined near singularities and are not necessarily nested. Therefore, optimal and realistic finer grids (compared with nested local refinements) could be used because of the freedom in generating nonnested multilevel grids.


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Additional Information

DOI: https://doi.org/10.1090/S0025-5718-1990-1035947-0
Article copyright: © Copyright 1990 American Mathematical Society

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