Exact completions of regular categories

Steve Lack (4/11/98)

This talk was based on the now published article A note on the exact completion of a regular category, and its infinitary generalizations, Theory and Applications of Categories, 5(1999), 70--80.

Abstract:

A new description of the exact completion Ex(C) of a regular category C is given, using a certain topos Shv(C) of sheaves on C; the exact completion is then constructed as the closure of C in Shv(C) under finite limits and coequalizers of equivalence relations. An infinitary generalization is proved, and the classical description of the exact completion is derived.

Other talks by the same speaker.
Back to titles of seminars.

---

Steve Lack

Last modified: Wed Jan 27 10:15:30 EST 1999