Completely normal elements in some finite abelian extensions

Abstract

We present some completely normal elements in the maximal real subfields of cyclotomic fields over the field of rational numbers, relying on the criterion for normal element developed in [Jung H.Y., Koo J.K., Shin D.H., Normal bases of ray class fields over imaginary quadratic fields, Math. Z., 2012, 271(1-2), 109-116]. And, we further find completely normal elements in certain abelian extensions of modular function fields in terms of Siegel functions.