References
- J. Adámek, H. Herrlich, and G.E. Strecker, Abstract and Concrete Categories, Wiley Interscience, New York, 1990.
- B. Banaschewski, Über nulldimensionale Räume, Math. Nachr. 13 (1955), 129– 140. doi: https://doi.org/10.1002/mana.19550130302
- E. Colebunders and M. Sioen, The Banaschewski compactification revisited, J. Pure Appl. Algebra 223 (2019), 5185–5214. doi: https://doi.org/10.1016/j.jpaa.2019.03.017
- A.J. Lemin, On ultrametrization of general metric spaces, Proc. Am. Math. Soc. 131(3) (2002), 979–989. doi: https://doi.org/10.1090/S0002-9939-02-06605-4
- A.J. Lemin and V.A. Lemin, On a universal ultrametric space, Topol. Appl. 103 (2000), 339–345. doi: https://doi.org/10.1016/S0166-8641(99)00029-2
- R. Lowen, Approach Spaces: The Missing Link in the Topology-Uniformity-Metric Triad, Oxford Mathematical Monographs, Oxford University Press, Oxford, 1997.
- R. Lowen, Index Analysis: Approach Theory at Work, Springer Monographs in Mathematics, Springer Verlag, London, 2015.
- R. Lowen and M. Sioen, A Wallman-Shanin-type compactification for approach spaces, Rocky MT J. Math. 30 (2000), 1381–1419. doi: https://doi.org/10.1216/rmjm/1021477356
- J.I. Nagata, Modern general topology, North Holland Publ. C., Amsterdam, 1968.
- M. Sioen, The Č ech-Stone compactification for Hausdorff uniform approach spaces is of Wallman-Shanin-type, Q&A in Gen. Topology 16 (1998), 189–211.
- M. Sioen and W. Van Den Haute, An alternative description of approach spaces via approach cores, Appl. Categ. Struct. 24(5) (2016), 545–558. doi: https://doi.org/10.1007/s10485-016-9447-x
- J. Vaughan, Universal ultrametric spaces of smallest weight, Topol. Proc. 24 (1999), 611–620.
- R.C. Walker, The Stone-Čech compactification, Springer Verlag, Berlin/Heidel-berg/New York, 1974.