ABSTRACT
There is a vast amount of material in matrix (operator) perturbation theory. Related books that are worth mentioning are [SS90], [Par98], [Bha96], [Bau85], and [Kat70]. In this chapter, we attempt to include the most fundamental results up to date, except those for linear systems and least squares problems for which the reader is referred to Section 38.1 and Section 39.6.
