Difference equations with applications to queues

"This monograph presents a theory of difference and functional equations with continuous argument based on a generalization of the Riemann integral introduced by N. E. Norlund, allowing differentiation with respect to the independent variable and permitting greater flexibility in constructing solutions and approximations - solving the nonlinear first order equation by a variety of methods, including an adaptation of the Lie-Grobner theory."--BOOK JACKET.