PETSc version 3.15.5

KSPHPDDMSetType

Sets the type of Krylov method used in KSPHPDDM.

#include "petscksp.h" 
PetscErrorCode KSPHPDDMSetType(KSP ksp, KSPHPDDMType type)

	ksp	- iterative context
	type	- any of gmres, bgmres, cg, bcg, gcrodr, bgcrodr, bfbcg, or preonly

Unlike KSPReset(), this function does not destroy any deflation space attached to the KSP. As an example, in the following sequence: KSPHPDDMSetType(ksp, KSPGCRODR); KSPSolve(ksp, b, x); KSPHPDDMSetType(ksp, KSPGMRES); KSPHPDDMSetType(ksp, KSPGCRODR); KSPSolve(ksp, b, x); the recycled space is reused in the second KSPSolve().

intermediate