Factorizable groups of homeomorphisms
Filters and semigroup properties.
Finite commutative monoids of open maps
Fixed sets and free subgroups of groups acting on metric spaces.
Fragmentable mappings and CHART groups
The purpose of this note is two-fold: firstly, to give a new and interesting result concerning separate and joint continuity, and secondly, to give a stream-lined (and self-contained) proof of the fact that "tame" CHART groups are topological groups.
Fuzzy neighborhood structures on partially ordered groups.