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40 results

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  • Sébastien Villemot's avatar
    7387dfb9
    Better preconditioners for stack_solve_algo={2,3} (GMRES + BiCGStab solvers) · 7387dfb9
    Sébastien Villemot authored 
    Implement preconditioners as in UMFITER and ITERSTACK:
– For UMFITER, on first iteration, do a full LU decomposition, and use it as a
  preconditioner
  in further iterations (similar to UMFITER in TROLL).
– For ITERSTACK, build a preconditioner based on a small LU decomposition
  repeated several times across the stack

By the way, uniformize the preconditioners for solve_algo={7,8} across the
different implementations.
    Verified
    7387dfb9
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    Better preconditioners for stack_solve_algo={2,3} (GMRES + BiCGStab solvers)
    Sébastien Villemot authored 
    Implement preconditioners as in UMFITER and ITERSTACK:
– For UMFITER, on first iteration, do a full LU decomposition, and use it as a
  preconditioner
  in further iterations (similar to UMFITER in TROLL).
– For ITERSTACK, build a preconditioner based on a small LU decomposition
  repeated several times across the stack

By the way, uniformize the preconditioners for solve_algo={7,8} across the
different implementations.