On ωb-open sets and b-Lindelöf spaces

Takashi Noiri, Ahmad Abdullah Al-omari, Mohd. Salmi Md. Noorani


In this paper, we introduce and investigate a new class of sets called ωb-open sets which is weaker than both ω-open sets and b-open sets. Moreover, we obtain a characterization and preserving theorems of b-Lindelöf spaces.


b-open set, ω-open set, b-Lindelöf space

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