Preprint: Proper maps of toposes

Dear category theorists, I would like to inform you that my preprint with Japie Vermeulen, "Proper maps of toposes", can now be obtained electronically from <http://www.math.uu.nl/people/moerdijk/preprints.html>. (This paper will eventually appear as an issue of the Memoirs of the AMS.) With best wishes for the holidays, Ieke Moerdijk.