GMRES now supports preconditioning #29
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Perform arnoldi factorization explicitly inside GMRES (rather through `call arnold`) as a first toward the implementation of the optional preconditioning.
ricardofrantz
approved these changes
Oct 10, 2023
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Added the possibility to pass a preconditioner to GMRES.
INFO messages are raised for CG and BiCGSTAB. Although they comply with the extend interface for linear solvers, preconditioning is not supported yet for these and any preconditioner passed to these will be ignored.