A decomposition of continuity

Semi-Open Sets and Semi-Continuity in Topological Spaces

Norman Levine · American Mathematical Monthly · 1963 · 1.3K citations

Topological Semigroups, Semi-open Sets, Topological Dynamic +6

On some classes of nearly open sets

Olav Njåstad · Pacific Journal of Mathematics · 1965 · 1.1K citations · Full text

A Decomposition of Continuity in Topological Spaces

Norman Levine · American Mathematical Monthly · 1961 · 236 citations

Set-theoretic Topology, Topological Algebra, Topological Property +2

α-Continuous and α-open mappings

A.S. Mashhour, I. A. Hasanein, S. N. El-Deeb · Acta Mathematica Academiae Scientiarum Hungaricae · 1983 · 213 citations

Topological Property, α-Open Mappings, Functional Analysis +1

Extensions of Topological Spaces

Sergey Fomin · Annals of Mathematics · 1943 · 202 citations

θ-Normal Space, Set-theoretic Topology, Topological Algebra +5