1# Nonlinear Solvers (SNES) 2 3The Scalable Nonlinear Equations Solvers (`SNES`) component provides an 4easy-to-use interface to Newton-type, quasi-Newton, full approximation scheme (FAS) multigrid, and other methods for solving systems of 5nonlinear equations. User guide chapter: [](ch_snes). 6 7`SNES` internally employs `KSP` for the solution of its linear systems. `SNES` users can also set `KSP` options directly in application 8codes by first extracting the `KSP` context from the `SNES` context via `SNESGetKSP()` 9and then directly calling various `KSP` (and `PC`) routines, 10 11<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/tutorials/index.html">Examples</A><BR> 12 13