E. Marchionna (Ed.) Questions on Algebraic Varieties Lectures given at aSummerSchoolof the Centro Internazionale Matematico Estivo (C.I.M.E.), held in Varenna (Como), Italy, September 7-17, 1969 C.I.M.E. Foundation c/o Dipartimento di Matematica “U. Dini” Viale Morgagni n. 67/a 50134 Firenze Italy [email protected] ISBN 978-3-642-11014-6 e-ISBN: 978-3-642-11015-3 DOI:10.1007/978-3-642-11015-3 Springer Heidelberg Dordrecht London New York ©Springer-Verlag Berlin Heidelberg 2010 Reprint of the 1sted.C .I.M.E.,E d.C remonese,R om a 1 970 With kind permission of C.I.M.E. Printed on acid-free paper Springer.com