The aim of the present book is to propose a new algebraic approach to
the study of norm stability of operator sequences which arise, for
example, via discretization of singular integral equations on composed
curves. A wide variety of discretization methods, including quadrature
rules and spline or wavelet approximations, is covered and studied from
a unique point of view. The approach takes advantage of the fruitful
interplay between approximation theory, concrete operator theory, and
local Banach algebra techniques. The book is addressed to a wide
audience, in particular to mathematicians working in operator theory and
Banach algebras as well as to applied mathematicians and engineers
interested in theoretical foundations of various methods in general use,
particularly splines and wavelets. The exposition contains numerous
examples and exercises. Students will find a large number of suggestions
for their own investigations.