PETSc version 3.16.5
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# KSP

Abstract PETSc object that manages all Krylov methods. This is the object that manages the linear solves in PETSc (even those such as direct solvers that do no use Krylov accelerators).

### Synopsis

    typedef struct _p_KSP*     KSP;

### Notes

When a direct solver is used, but no Krylov solver is used, the KSP object is still used but with a KSPType of KSPPREONLY, meaning that only application of the preconditioner is used as the linear solver.

### See Also

KSPCreate(), KSPSetType(), KSPType, SNES, TS, PC, KSP, KSPDestroy(), KSPCG, KSPGMRES

### Level

beginner

### Location

src/ksp/ksp/guess/../../../../include/petscksp.h

### Examples

src/ksp/ksp/tutorials/ex1.c.html
src/ksp/ksp/tutorials/ex2.c.html
src/ksp/ksp/tutorials/ex3.c.html
src/ksp/ksp/tutorials/ex5.c.html
src/ksp/ksp/tutorials/ex6.c.html
src/ksp/ksp/tutorials/ex7.c.html
src/ksp/ksp/tutorials/ex8.c.html
src/ksp/ksp/tutorials/ex9.c.html
src/ksp/ksp/tutorials/ex10.c.html
src/ksp/ksp/tutorials/ex11.c.html
src/ksp/ksp/tutorials/ex12.c.html

### Implementations

_p_KSP in include/petsc/private/kspimpl.h
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages