Symmetries and observable parameters of multi-Higgs-doublet models

We investigate the symmetries of the Yukawa and the Higgs sectors in multi-Higgs-doublet standard models. We extend a method that was originally formulated for counting the observable parameters of the Yukawa sector of the standard model to multi-Higgs-doublet models. In our analysis we include the Higgs potential and the interplay between the Higgs potential and Yukawa Lagrangian.