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math.NA2021
Convergence analysis of two-level methods with general coarse solvers
Xuefeng Xu
Multilevel methods are among the most efficient numerical methods for solving large-scale linear systems that arise from discretized partial differential equations. The fundamental…
math.NA2021
A new characterization of the convergence factor of two-level methods
Xuefeng Xu
Multilevel methods are among the most efficient numerical methods for solving large-scale systems of equations that arise from discretized partial differential equations. Two-level…