Department of Mathematics, Harbin Institude of Technology, Harbin, Heilongjiang 150001, People's Republic of China ; Department of Mathematics, Harbin Institude of Technology, Harbin, Heilongjiang 150001, People's Republic of China
Abstract:
This paper presents improved bounds for the norms of exceptional finite places of the group , where is an imaginary quadratic field of class number 2 or 3. As an application we show that .