# 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
cgne/
gltr/
nash/
stcg/
pipecg/
pipecgrr/
groppcg/
pipelcg/
pipeprcg/
pipecg2/
cg.c
cgeig.c
cgimpl.h
cgls.c
cgtype.c