Correlation Theory of Stationary and Related Random Functions is an
elementary introduction to the most important part of the theory dealing
only with the first and second moments of these functions. This theory
is a significant part of modern probability theory and offers both
intrinsic mathematical interest and many concrete and practical
applications. Stationary random functions arise in connection with
stationary time series which are so important in many areas of
engineering and other applications. This book presents the theory in
such a way that it can be understood by readers without specialized
mathematical backgrounds, requiring only the knowledge of elementary
calculus. The first volume in this two-volume exposition contains the
main theory; the supplementary notes and references of the second volume
consist of detailed discussions of more specialized questions, some more
additional material (which assumes a more thorough mathematical
background than the rest of the book) and numerous references to the
extensive literature.