Iterative refinement for approximate eigenelements of compact operators Mario Ahuès; Filomena d'Almeida; Mauricio Telias — 1984 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
Perturbation series and defect correction for the refinement of approximate eigenelements of linear integral operators d'Almeida, Filomena Dias Portugaliae mathematica