146696af2SBarry Smith# Linear Solvers and Krylov Methods (KSP) 246696af2SBarry Smith 346696af2SBarry SmithThe `KSP` class provides an easy-to-use interface to the combination of 4*789736e1SBarry Smitha Krylov subspace iterative method and a preconditioner `PC` for the solution of linear systems and some least squares problems. See 5*789736e1SBarry Smith`PETSCREGRESSORLINEAR` for additional regression (least squares) solvers. 646696af2SBarry Smith 746696af2SBarry Smith 846696af2SBarry Smith<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/index.html">Examples</A><BR> 946696af2SBarry Smith 10