The theory of singular perturbations em de jager jf furu 9780444821706 books amazonca. Description the subject of this textbook is the mathematical theory of singular perturbations which despite its respectable history is still in a state of vigorous development singular perturbations of cumulative and of boundary layer type are presented. Singular perturbation theory concerns the study of problems featuring a parameter for which the solutions of the problem at a limiting value of the parameter are different in character from the limit of the solutions of the general problem namely the limit is singular