Charakerisierung der lokalbeschränkten Ringtopologien auf globalen Körpern.
A method is presented making it possible to construct -groups with a strong theory of quasi-divisors of finite character and with some prescribed properties as subgroups of restricted Hahn groups , where are finitely atomic root systems. Some examples of these constructions are presented.
We give a description of possible sets of cycle lengths for distance-decreasing maps and isometries of the ring of n-adic integers.