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