petsc3.15.0 20210405
KSPUnwindPreconditioner
Unwinds the preconditioning in the solution. That is, takes solution to the preconditioned problem and gets the solution to the original problem from it.
Synopsis
#include "petscksp.h"
PetscErrorCode KSPUnwindPreconditioner(KSP ksp,Vec vsoln,Vec vt1)
Collective on ksp
Input Parameters
 ksp   iterative context

 vsoln   solution vector

 vt1   temporary work vector

Output Parameter
 vsoln   contains solution on output

Notes
If preconditioning either symmetrically or on the right, this routine solves
for the correction to the unpreconditioned problem. If preconditioning on
the left, nothing is done.
See Also
KSPSetPCSide()
Level
advanced
Location
src/ksp/ksp/interface/itres.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages