caa a22 4500 386385343 CHVBK 20180307112056.0 cr unu---uuuuu 161130e198903 xx s 000 0 eng 10.1017/S0305004100067773 doi S0305004100067773 pii (NATIONALLICENCE)cambridge-10.1017/S0305004100067773 Pultr A. Department of Applied Mathematics, Charles University, 11800 Prague 1, Czechoslovakia Categories of diametric frames [Elektronische Daten] [A. Pultr] The aim of this paper is to discuss categories arising when we extend the metric structure to pointless spaces (frames or locales). The classical distance function is here being replaced by the notion of diameter satisfying certain natural properties (monotonicity, subadditivity for intersecting elements, etc.). Copyright © Cambridge Philosophical Society 1989 Mathematical Proceedings of the Cambridge Philosophical Society Cambridge University Press 105/2(1989-03), 285-297 0305-0041 105:2<285 1989 105 PSP https://doi.org/10.1017/S0305004100067773 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0305004100067773 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pultr A. Department of Applied Mathematics, Charles University, 11800 Prague 1, Czechoslovakia NATIONALLICENCE 773 0- Mathematical Proceedings of the Cambridge Philosophical Society Cambridge University Press 105/2(1989-03), 285-297 0305-0041 105:2<285 1989 105 PSP CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge