Geodesic
A Note on Certain Spaces with Bases (mod K)
Canadian journal of mathematics, Tome 27 (1975) no. 2, pp. 469-474

Voir la notice de l'article provenant de la source Cambridge University Press

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 . 
Bennett, Harold R.; Martin, Harold W. A Note on Certain Spaces with Bases (mod K). Canadian journal of mathematics, Tome 27 (1975) no. 2, pp. 469-474. doi: 10.4153/CJM-1975-055-5
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