Praise for Alternate Realities Mathematical Models of Nature and Man "???covers the major topics completely and accurately within the context of current knowledge. Indeed, to my knowledge, there is no book which does so nearly as completely and well." ???George Leitmann, University of California, Berkeley "Surveys an extensive amount of modern mathematics???introduces and outlines some of these basic modern ideas for the non-specialist." ???Donald G. Saari, Northwestern University "A sophisticated and modern text on mathematical modelling???much more comprehensive than any of its competitors currently on the market." ???George Klir, State University of New York at Binghamton "Casti???s approach is fearless in constructing conceptual mappings between reality and mathematical notions. The book is pioneering in nature." ???Myron B. Allen, University of WyomingAn Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department.