Convex functions play an important role in almost all branches of
mathematics as well as other areas of science and engineering. This book
is a thorough introduction to contemporary convex function theory
addressed to all people whose research or teaching interests intersect
with the field of convexity. It covers a large variety of subjects, from
the one real variable case (with all its mathematical gems) to some of
the most advanced topics such as Choquet's theory, the Prékopa-Leindler
type inequalities and their ramifications, as well as the variational
approach of partial differential equations and convex programming. Many
results are new and the whole book reflects the authors' own experience,
both in teaching and research. The book can serve as a reference and
source of inspiration to researchers in several branches of mathematics
and engineering and it can also be used for graduate courses.