KSPCG only supports left preconditioning. On 1/16/08, Yujie <recrusader at gmail.com> wrote: > hi, everyone > > I know there are three types of preconditioners, that is left, split and > right preconditioners? When I use CG method in PETSc, whether do I need to > consider select one type of preconditioner? Whether do different types > affect the performance of preconditioned CG? thanks a lot. > > Regards, > Yujie >
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