New topologies between the usual and Niemytzki


  • Dina Abuzaid King Abdulaziz University
  • Maha Alqahtani Kinq Khalid University
  • Lutfi Kalantan King Abdulaziz University



Generated topology, H-space, Niemytzki plane, usual metric, CC-normal, L-normal, S-normal, C-paracompactness


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 weaker versions of normality.


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Author Biographies

Dina Abuzaid, King Abdulaziz University

Department of Mathematics

Maha Alqahtani, Kinq Khalid University

Department of Mathematics

Lutfi Kalantan, King Abdulaziz University

Department of Mathematics


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How to Cite

D. Abuzaid, M. Alqahtani, and L. Kalantan, “New topologies between the usual and Niemytzki”, Appl. Gen. Topol., vol. 21, no. 1, pp. 71–79, Apr. 2020.