Linear Solvers in SolverOptions

Table 7.2 and Table 7.3 show the solvers and preconditioners supported by esys.finley through the PASO library. Currently direct solvers are not supported under MPI. By default, esys.finley is using the iterative solvers SolverOptions.PCG for symmetric and SolverOptions.BICGSTAB for non-symmetric problems. If the direct solver is selected which can be useful when solving very ill-posedequations esys.finley uses the MKL solver package. If MKL is not available UMFPACK is used. If UMFPACK is not available a suitable iterative solver from the PASO is used.

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