Class Scine::Utils::IndirectPreconditionerEvaluator¶

class IndirectPreconditionerEvaluator : public Scine::Utils::PreconditionerEvaluator ¶

This preconditioner evaluator returns the diagonal preconditioner for the Davidson algorithm.

Public Functions

Eigen::VectorXd evaluate(double eigenvalue) const¶

Evaluates the preconditioner vector.

The preconditioner elements are p_k = (H - h_k*I)^{-1}, where H is the diagonal of the full matrix.

Parameters