I. N. Herstein (Ed.) Some Aspects of Ring Theory Lectures given at a SummerSchoolof the Centro Internazionale Matematico Estivo (C.I.M.E.), held in Varenna (Como), Italy, August 23-31, 1965 C.I.M.E. Foundation c/o Dipartimento di Matematica “U. Dini” Viale Morgagni n. 67/a 50134 Firenze Italy [email protected] ISBN 978-3-642-11035-1 e-ISBN: 978-3-642-11036-8 DOI:10.1007/978-3-642-11036-8 Springer Heidelberg Dordrecht London New York ©Springer-Verlag Berlin Heidelberg 2010 Reprint of the 1stEd. C.I.M.E., Ed. Cremonese, Rom a 1965 With kind permission of C.I.M.E. Printed on acid-free paper Springer.com