Address: Erdos Papers, Alfréd Rényi Institute of Mathematics, Hungarian Academy of Sciences H-1053 Budapest, Reáltanoda u. 13-15. H-1364 Budapest, P. O. Box: 127 Phone: (36-1) = Hungary, Budapest 4838-302 (Secretariat) Fax: (36-1) 483-8333 e-mail:p_erdos@renyi.hu or e-mail:miki@renyi.hu