# 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

lmbasis.h
lmproducts.c
lmproducts.h
lmvmimpl.c
lmbasis.c
lmvm.h
lmvmutils.c

Directories

bfgs
brdn
dense
dfp
diagbrdn
sr1
symbrdn
tests
blas_cyclic
rescale