In 1979, I edited Volume 18 in this series: Solution Methods for
Integral Equations: Theory and Applications. Since that time, there has
been an explosive growth in all aspects of the numerical solution of
integral equations. By my estimate over 2000 papers on this subject have
been published in the last decade, and more than 60 books on theory and
applications have appeared. In particular, as can be seen in many of the
chapters in this book, integral equation techniques are playing an
increas- ingly important role in the solution of many scientific and
engineering problems. For instance, the boundary element method
discussed by Atkinson in Chapter 1 is becoming an equal partner with
finite element and finite difference techniques for solving many types
of partial differential equations. Obviously, in one volume it would be
impossible to present a complete picture of what has taken place in this
area during the past ten years. Consequently, we have chosen a number of
subjects in which significant advances have been made that we feel have
not been covered in depth in other books. For instance, ten years ago
the theory of the numerical solution of Cauchy singular equations was in
its infancy. Today, as shown by Golberg and Elliott in Chapters 5 and 6,
the theory of polynomial approximations is essentially complete,
although many details of practical implementation remain to be worked
out.