PCGALERKIN

Build (part of) a preconditioner by P S R (where P is often R^T)

Note

Use

     `PCGalerkinSetRestriction`(pc,R) and/or `PCGalerkinSetInterpolation`(pc,P)
     `PCGalerkinGetKSP`(pc,&ksp);
     `KSPSetOperators`(ksp,A,....)
     ...

Developer Notes

If KSPSetOperators() has not been called on the inner KSP then PCGALERKIN could use MatRARt() or MatPtAP() to compute the operators automatically.

Should there be a prefix for the inner KSP?

There is no KSPSetFromOptions_Galerkin() that calls KSPSetFromOptions() on the inner KSP

See Also

KSP: Linear System Solvers, PCCreate(), PCSetType(), PCType, PC, PCSHELL, PCKSP, PCGalerkinSetRestriction(), PCGalerkinSetInterpolation(), PCGalerkinGetKSP()

Level

intermediate

Location

src/ksp/pc/impls/galerkin/galerkin.c

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Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages