On Weakly Hausdorff Spaces and Locally Strongly Sober Spaces
Keywords:
lens, locally strongly sober, Stone duality, temperate frame, weakly HausdorffAbstract
We show that the locally strongly sober spaces are exactly the coherent sober spaces that are weakly Hausdorff in the sense of Klaus Keimel and Jimmie D. Lawson. This allows us to describe their Stone duals explicitly. As another application, we show that weak Hausdorffness is a suffcient condition for lenses and of quasi-lenses to form homeomorphic spaces, generalizing previously known results.
References
Ofelia T. Alas and Richard G. Wilson, Spaces in which compact subsets are closed and the lattice of $T_1$-topologies on a set. Comment. Math. Univ. Carolin. 43 (2002), no. 4, 641-652.
B. Ban aschewski and G. C. L. Brümmer, Stably continuous frames, Math. Proc. Cambridge Philos. Soc. 104 (1988), no. 1, 7-19.
Guram Bezhanishvili and John Harding, Stable compactifications of frames, Cah. Topol. Géom. Différ. Catég. 55 (2014), no. 1, 37-65.
G. Gierz, K. H. Hofmann, K. Keimel, J. D. Lawson, M. Mislove, and D. S. Scott, Continuous Lattices and Domains. Encyclopedia of Mathematics and its Applications, 93. Cambridge: Cambridge University Press, 2003.
Jean Goubault-Larrecq, De Groot duality and models of choice: Angels, demons and nature, Math. Structures Comput. Sci. 20 (2010), no. 2, 169-237.
Jean Goubault-Larrecq, Non-Hausdorff Topology and Domain Theory: Selected Topics in Point-Set Topology. New Mathematical Monographs, Series Number 22. Cambridge: Cambridge University Press, 2013.
Reinhold Heckmann, Power domains and second-order predicates, Theoret. Comput. Sci. 111 (1993), no. 1-2, 59-88.
Reinhold Heckmann, Abstract valuations: A novel representation of Plotkin power domain and Vietoris hyperspace in Mathematical Foundations of Progamming Semantics. Ed. S. Brookes and M. Mislove. Electronic Notes in Theoretical Computer Science, 6. Amsterdam: Elsevier Sci. B. V., 1997. 14 pages.
Rudolf- E. Hoffmann, On weak Hausdorff spaces, Arch. Math. (Basel) 32 (1979), no. 5, 487-504.
Karl H. Hofmann and Jimmie D. Lawson, The spectral theory of distributive continuous lattices, Trans. Amer. Math. Soc. 246 (1978), 285-310.
John Isbell, Completion of a construction of Johnstone, Proc. Amer. Math. Soc. 85 (1982), no. 3, 333-334.
Xiaodong Jia, Achim Jung, and Qingguo $\mathrm{Li}_1$ A note on coherence of dcpos, Topology Appl. 209 ( 2016), 235-238.
Peter T. Johnstone, Stone Spaces. Cambridge Studies in Advanced Mathematics, 3. Cambridge:, Cambridge University Press, 1982.
Klaus Keimel and Jimmie D. Lawson, Measure extension theorems for $T_0$-spaces, Topology Appl. 149 (2005), no. 1-3, 57-83.
M. C. McCord, Classifying spaces and infinite symmetric products, Trans. Amer. Math. Soc. 146 (1969), 273-298.
Lynn Arthur Steen and J. Arthur Seebach, Jr. Counterexamples in Topology. Second edition. New York-Heidelberg: Springer-Verlag, 1978.
Xiaoyong Xi and Jimmie Lawson, On well-filtered spaces and ordered sets, Topology Appl. 228 (2017), 139-144.