**petsc-dev 2014-04-22**

# KSPPREONLY

This implements a stub method that applies ONLY the preconditioner. This may be used in inner iterations, where it is desired to allow multiple iterations as well as the "0-iteration" case. It is commonly used with the direct solver preconditioners like PCLU and PCCHOLESKY
### Options Database Keys

**see KSPSolve()** -

### See Also

KSPCreate(), KSPSetType(), KSPType (for list of available types), KSP

**Level:**beginner

Location:src/ksp/ksp/impls/preonly/preonly.c

Index of all KSP routines

Table of Contents for all manual pages

Index of all manual pages

### Examples

src/ksp/ksp/examples/tutorials/ex30.c.html

src/ksp/ksp/examples/tutorials/ex52.c.html

src/tao/constrained/examples/tutorials/maros.c.html

src/tao/constrained/examples/tutorials/toy.c.html

src/tao/constrained/examples/tutorials/toyf.F.html