nLab
quasitopological groupoid

A stub for now.

A quasitopological groupoid is a generalisation of a topological groupoid in that composition is not necessarily continuous, but only left and right composition by each arrow (when this is defined). It is the horizontal categorification of a quasitopological group.

More generally, one can talk about a quasi-C groupoid, where CC is a (topological?) concrete category or a site (Warning: the last object is current research by me, and may only be a curiosity).

More later…

Created on May 4, 2010 06:39:48 by David Roberts (203.24.207.226)