Operator concept

Files
file	operators.hh
	Define general, extensible interface for operators. The available implementation wraps a matrix.

Classes
class	Dune::NonoverlappingSchwarzOperator< M, X, Y, C >
	A nonoverlapping operator with communication object. More...
class	Dune::LinearOperator< X, Y >
	A linear operator. More...
class	Dune::AssembledLinearOperator< M, X, Y >
	A linear operator exporting itself in matrix form. More...
class	Dune::MatrixAdapter< M, X, Y >
	Adapter to turn a matrix into a linear operator. More...
class	Dune::OverlappingSchwarzOperator< M, X, Y, C >
	An overlapping schwarz operator. More...

Detailed Description

The solvers in ISTL do not work on matrices directly. Instead we use an abstract operator concept. This allows for using matrix-free operators, i.e. operators that are not stored as matrices in any form. Thus our solver algorithms can easily be turned into matrix-free solvers just by plugging in matrix-free representations of linear operators and preconditioners.