Institution: | Mathematics and Computer Science Department, Lehman College, CUNY, Bronx, New York 10468; Ph. D. Program in Mathematics, Graduate Center, CUNY, New York, New York 10016 ; Ph.D. Program in Computer Science, Graduate Center, CUNY, New York, New York 10016 R. E. Rosholt ; Mathematics and Computer Science Department, Lehman College, CUNY, Bronx, New York 10468 H. Kodal ; University of Kocaeli, Department of Mathematics, 41300 Izmit, Kocaeli, Turkey |