On Finite Intersections of "Henselian Valued" Fields.
On normal subgroups of compact groups
Among compact Hausdorff groups whose maximal profinite quotient is finitely generated, we characterize those that possess a proper dense normal subgroup. We also prove that the abstract commutator subgroup is closed for every closed normal subgroup of .
On Parabolic Subgroups and Hecke Algebras of some Fractal Groups
* The authors thank the “Swiss National Science Foundation” for its support.We study the subgroup structure, Hecke algebras, quasi-regular representations, and asymptotic properties of some fractal groups of branch type. We introduce parabolic subgroups, show that they are weakly maximal, and that the corresponding quasi-regular representations are irreducible. These (infinite-dimensional) representations are approximated by finite-dimensional quasi-regular representations. The Hecke algebras...
On prosolvable subgroups of profinite free products and some applications.
On some systems of equations with constraints in a free group. – Addenda. (Sur certains systèmes d'équations avec constraintes dans un groupe libre. – Addenda.)
On some systems of equations with constraints in a free group. (Sur certains systèmes d'équations avec contraintes dans un groupe libre.)
On the inverse limit of free nilpotent groups.
On the product formula in Galois groups.
On the Structure of Compact Torsion Groups.
On the verbal width of finitely generated pro- groups.
Partial Homogeneity in Locally Finite Groups.
Positively finitely generated groups.
Positiv-zerlegte p-Erweiterungen algebraischer Zahlkörper.
Pro- groups and towers of rational homology spheres.
Pro-2-Demuskin groups of rank ...0 as Galois groups of maximal 2-extensions of fields.
Profinite completions of the fundamental group of the Klein bottle
Realization of finitely generated profinite groups by maximal abelian extensions of fields.
Realizing dyadic factors of elementary type Witt rings and pro-2 Galois groups.
Representation filters and their application in the theory of local fields.
Ring-theoretic properties of Iwasawa algebras: a survey.