title: On the coefficients of the characteristic series of the U-operator.
abstract: A conceptual proof is given of the fact that the coefficients of the characteristic series of the U-operator acting on families of overconvegent modular forms lie in the Iwasawa algebra.
authors.affiliation: Department of Mathematics, University of California, Berkeley, CA 94720-3840, USA.
authors.forename: R F
authors.initials: RF
authors.lastname: Coleman