Bresar M., Chebotar M.A., Martindale W.S. Functional Identities

Birkhäuser Verlag, 2007. — 270 p. — ISBN: 376437795XA functional identity can be informally described as an identical relation involving arbitrary elements in an associative ring together with arbitrary (unknown) functions. The theory of functional identities is a relatively new one, and this is the first book on this subject. The book is accessible to a wide audience and touches on a variety of mathematical areas such as ring theory, algebra and operator theory.