# 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` for the solution of linear systems and some least squares problems. See `PETSCREGRESSORLINEAR` for additional regression (least squares) solvers. Examples

Source files

cgeig.c
cgimpl.h
cgls.c
cg.c
cgtype.c

Directories

cgne
gltr
groppcg
nash
pipecg
pipecg2
pipecgrr
pipelcg
pipeprcg
stcg