Difference algebra grew out of the study of algebraic difference
equations with coefficients from functional fields. The first stage of
this development of the theory is associated with its founder, J.F. Ritt
(1893-1951), and R. Cohn, whose book Difference Algebra (1965) remained
the only fundamental monograph on the subject for many years. Nowadays,
difference algebra has overgrown the frame of the theory of ordinary
algebraic difference equations and appears as a rich theory with
applications to the study of equations in finite differences, functional
equations, differential equations with delay, algebraic structures with
operators, group and semigroup rings.
The monograph is intended for graduate students and researchers in
difference and differential algebra, commutative algebra, ring theory,
and algebraic geometry. The book is self-contained; it requires no
prerequisites other than the knowledge of basic algebraic concepts and a
mathematical maturity of an advanced undergraduate.