Operators Extending (Pseudo-)Metrics
arXiv:math/0012094
Abstract
We introduce a general method of extending (pseudo-)metrics from X to FX, where F is a normal functor on the category of metrizable compacta. For many concrete instances of F, our method specializes to the known constructions.
6 pages. A revised version (minor corrections) of a published article, whose original text is difficult to obtain