Anders Logg wrote: > On Mon, Jun 08, 2009 at 12:52:41PM +0200, Jed Brown wrote: >> Anders Logg wrote: >>> On Fri, Jun 05, 2009 at 06:00:36PM -0500, Brandon Chabaud wrote: >>>> Is there some way to inform the Krylov solver that constant pressure is in >>>> the >>>> null space of the operator from Dolfin? The only options that I could >>>> find for >>>> the KrylovSolver command were setting the solver type and setting the >>>> preconditioner type. >>> No, that's not included in the interface. You will have to extract the >>> PETSc Mat pointer using mat() from PETScMatrix and use PETSc calls. >> Almost. You need to get the KSP object from the solver and call >> KSPSetNullSpace(). > > It looks like the KSP object is not available in the PETScKrylovSolver > interface anymore. Why has it been removed. Garth? >
Not sure that we ever had it. Anyway, I've added it now. PETScKrylovSolver may however need some work to make sure that user options are not overridden. Garth > > > ------------------------------------------------------------------------ > > _______________________________________________ > FFC-dev mailing list > ffc-...@fenics.org > http://www.fenics.org/mailman/listinfo/ffc-dev _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@fenics.org http://www.fenics.org/mailman/listinfo/dolfin-dev
