Class DiagonalPreconditioner¶

Class Documentation¶

class DiagonalPreconditioner¶

Simple preconditioner that approximates the matrix by a diagonal matrix.

Public Functions

DiagonalPreconditioner() = default¶

Default constructor

inline DiagonalPreconditioner(const CSRMatrix &A)¶

Constructs a diagonal preconditioner for the matrix A.

Parameters:

A –

virtual ~DiagonalPreconditioner() = default¶

inline Vector rhs(const Vector &b) const¶

Returns the preconditioned right-hand-side \(P(b) = D(A)^{-1}b\).