Steven Roman is a mathematician, currently Emeritus Professor of Mathematics at California State University and Lecturer in Mathematics at University of California. He is one of the main developers of umbral calculus. He has written around 40 books on mathematics and computer programming.
Professor Roman's books have been translated into Portuguese, French, Korean, Chinese, Russian, Polish, Bulgarian, Czech and Spanish.
Website: www.sroman.com
Steven Roman in libraries (WorldCat catalog)