caa a22 4500 386360480 CHVBK 20180307111913.0 cr unu---uuuuu 161130e198906 xx s 000 0 eng 10.1017/S0004972700003336 doi S0004972700003336 pii (NATIONALLICENCE)cambridge-10.1017/S0004972700003336 Idempotents in bicategories [Elektronische Daten] It is shown that the category of fixed points of a left exact idempotent functor on a topos is again a topos. As well as a direct proof, a bicategorical proof is given which shows that the result only depends on certain bicategorical exactness properties. Copyright © Australian Mathematical Society 1989 Paré R. Dept of Math, Stats and Comp Sci, Dalhousie University, Halifax, Nova Scotia Canada. B3H 3J5 Rosebrugh R. Department of Math and Computer Science, Mount Allison University, Sackville, New Brunswick E0A 3C0 Canada. Wood R.J. Dept of Math, Stats and Comp Sci, Dalhousie University, Halifax, Nova Scotia Canada. B3H 3J5 Bulletin of the Australian Mathematical Society Cambridge University Press 39/3(1989-06), 421-434 0004-9727 39:3<421 1989 39 BAZ https://doi.org/10.1017/S0004972700003336 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0004972700003336 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Paré R. Dept of Math, Stats and Comp Sci, Dalhousie University, Halifax, Nova Scotia Canada. B3H 3J5 NATIONALLICENCE 700 1- Rosebrugh R. Department of Math and Computer Science, Mount Allison University, Sackville, New Brunswick E0A 3C0 Canada NATIONALLICENCE 700 1- Wood R.J. Dept of Math, Stats and Comp Sci, Dalhousie University, Halifax, Nova Scotia Canada. B3H 3J5 NATIONALLICENCE 773 0- Bulletin of the Australian Mathematical Society Cambridge University Press 39/3(1989-06), 421-434 0004-9727 39:3<421 1989 39 BAZ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge