dolfinx::nls::NonlinearProblem Class Reference

This is a base class for nonlinear problems which can return the nonlinear function F(u) and its Jacobian J = dF(u)/du. More...

#include <NonlinearProblem.h>

Public Member Functions
	NonlinearProblem ()=default
	Constructor.
virtual	~NonlinearProblem ()
	Destructor.
virtual void	form (Vec)
	Function called by Newton solver before requesting F, J or J_pc. This can be used to compute F, J and J_pc together. Note: the vector x is not const as this function is commonly used to update ghost entries before assembly.
virtual Vec	F (const Vec x)=0
	Compute F at current point x.
virtual Mat	J (const Vec x)=0
	Compute J = F' at current point x.
virtual Mat	P (const Vec)
	Compute J_pc used to precondition J. Not implementing this or leaving P empty results in system matrix A being used to construct preconditioner.

Detailed Description

This is a base class for nonlinear problems which can return the nonlinear function F(u) and its Jacobian J = dF(u)/du.

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The documentation for this class was generated from the following file:

• /build/dolfinx-EGDDvI/dolfinx-2019.2.0~git20200723.696fbc0/cpp/dolfinx/nls/NonlinearProblem.h