# Linear Solvers and Krylov Methods (KSP)
The `KSP` class provides an easy-to-use interface to the combination of
a Krylov subspace iterative method and a preconditioner `PC`.
Examples
Source files
petscksp.h
petsckspdefmod.F90
petsckspmod.F90
petscpc.h
petscpcmod.F90