@UNPUBLISHED{publication1, title = "The representing localic groupoid for a geometric theory", author = "{MANUELL, Graham} and {WRIGLEY, Joshua L.}", year = "2023-05-24", abstract = "

We give an expository, and hopefully approachable, account of the Joyal-Tierney result that every topos can be represented as a topos of sheaves on a localic groupoid. We give an explicit presentation of a representing localic groupoid for the classifying topos of a given geometric theory and discuss links with the topological groupoids of Forssell.

", url = "http://www.mat.uc.pt/preprints/eng\_2023.html", note = "" }