Functional equations and inequalities with applications / Pl. Kannappan

This book should be of considerable interest for students and scholars working on functional equations. Some of the chapters treat in detail classical subjects such as Cauchy, trigonometric and quadratic functional equations and present most recent results from the literature. Other chapters consider topics like nondifferentiable functions, characterization of groups, loops, and closure conditions, functional equations in information theory, difference equations and characterizations of special functions, which, as far as I know, are presented in a coherent form for the first time, collecting and integrating results scattered in various research papers.
A final hundred pages of applications of functional equations and inequalities to several problems, ranging from geometry to physics, from economics to statistics and behavioural sciences, together with a comprehensive bibliography of more than 800 titles, conclude this interesting book. (MathSciNet)