Department of Mathematics, KAIST Daejon, 305-701, Korea ; Department of Mathematics, KAIST Daejon, 305-701, Korea ; Department of Mathematics, KAIST Daejon, 305-701, Korea
Abstract:
In this paper, we define the group of cyclotomic units and Stickelberger ideals in any subfield of the cyclotomic function field. We also calculate the index of the group of cyclotomic units in the total unit group in some special cases and the index of Stickelberger ideals in the integral group ring.