Ohta, Haruto(Universitat Politècnica de València, 2000-10-01)
[EN] The first part of the paper is a brief survey on recent topics concerning the relationship between C*-embedding and C-embedding for closed subsets. The second part studies extension properties of the Niemytzki plane ...
Abuzaid, Dina; Alqahtani, Maha; Kalantan, Lutfi(Universitat Politècnica de València, 2020-04-03)
[EN] We use the technique of Hattori to generate new topologies on the closed upper half plane which lie between the usual metric topology and the Niemytzki topology. We study some of their fundamental properties and ...