Uniformities induced by cozero and Baire sets
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- by Anthony W. Hager PDF
- Proc. Amer. Math. Soc. 63 (1977), 153-159 Request permission
Abstract:
This paper treats the cozero- and Baire-fine uniform spaces, those X such that each cozero (resp., Baire) function on X is uniformly continuous. The emphasis is on the general method, with the results about coz and Ba as corollaries. Some of these, stated just for coz: The coz functor out of Unif has no left adjoint, but its restrictions to precompact, and to separable, spaces do. A space is coz-fine iff it is proximally fine and each finite coz-cover is uniform. A cozero field $\mathcal {A}$ has a compatible coz-fine uniform space iff the meet of two completely additive $\mathcal {A}$ -covers is another.References
- E. M. Alfsen and O. Njȧstad, Proximity and generalized uniformity, Fund. Math. 52 (1963), 235–252. MR 154257, DOI 10.4064/fm-52-3-235-252
- R. Engelking, Outline of general topology, North-Holland Publishing Co., Amsterdam; PWN—Polish Scientific Publishers, Warsaw; Interscience Publishers Division John Wiley & Sons, Inc., New York, 1968. Translated from the Polish by K. Sieklucki. MR 0230273
- Z. Frolík, Baire sets and uniformities on complete metric spaces, Comment. Math. Univ. Carolinae 13 (1972), 137–147. MR 325903
- Zdeněk Frolík, A note on metric-fine spaces, Proc. Amer. Math. Soc. 46 (1974), 111–119. MR 358704, DOI 10.1090/S0002-9939-1974-0358704-X
- Zdeněk Frolík, Basic refinements of the category of uniform spaces, TOPO 72—general topology and its applications (Proc. Second Pittsburgh Internat. Conf., Pittsburgh, Pa., 1972; dedicated to the memory of Johannes H. de Groot), Lecture Notes in Math., Vol. 378, Springer, Berlin, 1974, pp. 140–158. MR 0358705
- Zdeněk Frolík, Measurable uniform spaces, Pacific J. Math. 55 (1974), 93–105. MR 383358
- Anthony W. Hager, Some nearly fine uniform spaces, Proc. London Math. Soc. (3) 28 (1974), 517–546. MR 397670, DOI 10.1112/plms/s3-28.3.517
- Anthony W. Hager, Measurable uniform spaces, Fund. Math. 77 (1972), no. 1, 51–73. MR 324661, DOI 10.4064/fm-77-1-51-73
- Anthony W. Hager, Vector lattices of uniformly continuous functions and some categorical methods in uniform spaces, TOPO 72—general topology and its applications (Proc. Second Pittsburgh Internat. Conf. Pittsburgh, Pa., 1972; dedicated to the memory of Johannes H. de Groot), Lecture Notes in Math., Vol. 378, Springer, Berlin, 1974, pp. 172–187. MR 0362236 (d) —, Proximally and measurably fine uniform spaces, Notices Amer. Math. Soc. 20 (1973), A-26. Abstract #73T-G8. (e) —, Uniformities induced by proximity, cozero, and Baire sets, 1973 (preprint).
- Horst Herrlich and George E. Strecker, Category theory: an introduction, Allyn and Bacon Series in Advanced Mathematics, Allyn and Bacon, Inc., Boston, Mass., 1973. MR 0349791
- M. Hušek, Categorical methods in topology, General Topology and its Relations to Modern Analysis and Algebra, II (Proc. Second Prague Topological Sympos., 1966) Academia, Prague, 1967, pp. 190–194. MR 0235005
- J. R. Isbell, Uniform spaces, Mathematical Surveys, No. 12, American Mathematical Society, Providence, R.I., 1964. MR 0170323 M. Katětov, Über die Berührungsräume, Wiss. Zeitschr. Humboldt Univ. Berlin, Math.-Nat. Reihe 9 (1959/60), 685-691.
- J. F. Kennison, Reflective functors in general topology and elsewhere, Trans. Amer. Math. Soc. 118 (1965), 303–315. MR 174611, DOI 10.1090/S0002-9947-1965-0174611-9
- V. Poljakov, Regularity, product and spectra of proximity spaces, Dokl. Akad. Nauk SSSR 154 (1964), 51–54 (Russian). MR 0157347
- Michael D. Rice, Metric fine uniform spaces, J. London Math. Soc. (2) 11 (1975), no. 1, 53–64. MR 420566, DOI 10.1112/jlms/s2-11.1.53
Additional Information
- © Copyright 1977 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 63 (1977), 153-159
- MSC: Primary 54E15
- DOI: https://doi.org/10.1090/S0002-9939-1977-0436082-8
- MathSciNet review: 0436082