Hausdorff dimension in $R$-analytic profinite groups
  We study the Hausdorff dimension of R-analytic subgroups in an R-analytic profinite group, where R is a pro-p ring whose asso- ciated graded ring is an integral domain. In particular, we prove that the set of such Hausdorff dimensions is a finite subset of the rational numbers. 
Gustavo A. Fern\'andez-Alcober, Eugenio Giannelli, Jon   Gonz\'alez-S\'anchez
math.GR