OOF2: The Manual
Name
NonlinearSolverBase — Base class for nonlinear solvers, including the null solver.
Subclasses
Subclasses are listed as they appear in the GUI and (in parentheses) as they appear in scripts.

None (
NoNonlinearSolver
)  Use linear equation solvers. 
Newton (
Newton
)  Solve nonlinear equations with Newton's method. 
Picard (
Picard
)  Solve nonlinear equations with Picard iteration. Picard converges more slowly than Newton's method, but does less work per iteration.
Description
Subclasses of NonlinearSolverBase
implement
different ways of solving nonlinear sets of equations, including the
trivial case, NoNonlinearSolver,
which is actually just a linear solver.
NonlinearSolverBase
objects are used as the
nonlinear_solver
argument to AdvancedSolverMode when specifying a
solver in OOF.Subproblem.Set_Solver.