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A Note on Certain Spaces with Bases (mod K)
Published online by Cambridge University Press: 20 November 2018
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In this note all spaces are assumed to be regular T1 spaces and all undefined terms and notations may be found in [8], In particular let cl(A) denote the closure of the set A and let Z+ denote the set of natural numbers.
Definition 1. Let X be a topological space and a covering of X by compact sets. An open covering of X is said to be a basis (mod K) if whenever and an open set V contains Kx, then there exists such that . In such a case X is written as the ordered triple .
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- Copyright © Canadian Mathematical Society 1975