Weil uniformities for frames
Picado, Jorge
Commentationes Mathematicae Universitatis Carolinae, Tome 36 (1995), p. 357-370 / Harvested from Czech Digital Mathematics Library

In pointfree topology, the notion of uniformity in the form of a system of covers was introduced by J. Isbell in [11], and later developed by A. Pultr in [14] and [15]. Another equivalent notion of locale uniformity was given by P. Fletcher and W. Hunsaker in [6], which they called “entourage uniformity”. The purpose of this paper is to formulate and investigate an alternative definition of entourage uniformity which is more likely to the Weil pointed entourage uniformity, since it is expressed in terms of products of locales. We show that our definition is equivalent to the previous ones by proving that our category of Weil uniform frames is isomorphic to the one defined in [6].

Publié le : 1995-01-01
Classification:  06D20,  54E15,  54E55
@article{118762,
     author = {Jorge Picado},
     title = {Weil uniformities for frames},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     volume = {36},
     year = {1995},
     pages = {357-370},
     zbl = {0832.54025},
     mrnumber = {1357535},
     language = {en},
     url = {http://dml.mathdoc.fr/item/118762}
}
Picado, Jorge. Weil uniformities for frames. Commentationes Mathematicae Universitatis Carolinae, Tome 36 (1995) pp. 357-370. http://gdmltest.u-ga.fr/item/118762/

Banaschewski B. Another look at the localic Tychonoff Theorem, Comment. Math. Univ. Carolinae 29 (1988), 647-656. (1988) | MR 0982782 | Zbl 0667.54009

Banaschewski B. Bourbaki's Fixpoint Lemma reconsidered, Comment. Math. Univ. Carolinae 33 (1992), 303-309. (1992) | MR 1189661 | Zbl 0779.06004

Banaschewski B.; Brümmer G.C.L.; Hardie K.A. Biframes and bispaces, Quaestiones Math. 6 (1983), 13-25. (1983) | MR 0700237

Bourbaki N. Topologie générale, Hermann, Paris, 1982. | Zbl 1107.54001

Dowker C.H.; Strauss D. Sums in the category of frames, Houston J. Math. 3 (1977), 7-15. (1977) | MR 0442900 | Zbl 0341.54001

Fletcher P.; Hunsaker W. Entourage uniformities for frames, Monatsh. Math. 112 (1991), 271-279. (1991) | MR 1141095 | Zbl 0736.54023

Fletcher P.; Hunsaker W.; Lindgren W. Characterizations of frame quasi-uniformities, Quaestiones Math. 16 (1993), 371-383. (1993) | MR 1254164 | Zbl 0792.54026

Fletcher P.; Hunsaker W.; Lindgren W. Totally bounded frame quasi-uniformities, Comment. Math. Univ. Carolinae 34 (1993), 529-537. (1993) | MR 1243084 | Zbl 0786.54028

Fletcher P.; Hunsaker W.; Lindgren W. Frame quasi-uniformities, Monatsh. Math. 117 (1994), 223-236. (1994) | MR 1279114 | Zbl 0796.54037

Frith J.L. Structured frames, PhD Thesis, University of Cape Town, 1987.

Isbell J. Atomless parts of spaces, Math. Scand. 31 (1972), 5-32. (1972) | MR 0358725 | Zbl 0246.54028

Johnstone P.T. Stone spaces, Cambridge Studies in Advanced Mathematics 3, Cambridge University Press, 1982. | MR 0698074 | Zbl 0586.54001

Picado J. Frame quasi-uniformities by entourages, preprint (Universidade de Coimbra, 1994). | MR 1722578 | Zbl 1005.54030

Pultr A. Pointless uniformities I. Complete regularity, Comment. Math. Univ. Carolinae 25 (1984), 91-104. (1984) | MR 0749118 | Zbl 0543.54023

Pultr A. Pointless uniformities II. (Dia)metrization, Comment. Math. Univ. Carolinae 25 (1984), 105-120. (1984) | MR 0749119

Tukey J.W. Convergence and uniformity in topology, Ann. of Math. Studies 2, Princeton University Press, 1940. | MR 0002515 | Zbl 0025.09102

Weil A. Sur les espaces à structure uniforme et sur la topologie générale, Hermann, Paris, 1938. | Zbl 0019.18604