On weaker forms of compactness Lindelöfness and countable compactness

Abstract

A theory of e-countable compactness and e-Lindelöfness which are weaker than the concepts of countable compactness and Lindelöfness respectively is developed. Amongst other results we show that an e-countably compact space is pseudocompact, and an example of a space which is pseudocompact but not e-countably compact with respect to any dense set is presented. We also show that every e-Lindelöf metric space is separable.

Keywords

• e-compact
• e-countably compact
• e-Lindelöf
• pseudocompact
• separable.