No books dealing with a comprehensive illustration of the fast
developing field of nonlinear analysis had been published for the
mathematicians interested in this field for more than a half century
until D. H. Hyers, G. Isac and Th. M. Rassias published their book,
"Stability of Functional Equations in Several Variables".
This book will complement the books of Hyers, Isac and Rassias and of
Czerwik (Functional Equations and Inequalities in Several Variables) by
presenting mainly the results applying to the Hyers-Ulam-Rassias
stability. Many mathematicians have extensively investigated the
subjects on the Hyers-Ulam-Rassias stability. This book covers and
offers almost all classical results on the Hyers-Ulam-Rassias stability
in an integrated and self-contained fashion.