Research Article
Approximation and Compactness
Published in:
Quaestiones Mathematicae
Volume 49 , issue 1 : Entrepreneurship and Africa’s Cultural Context , 2024 , pages: 79–118
Volume 49 , issue 1 : Entrepreneurship and Africa’s Cultural Context , 2024 , pages: 79–118
DOI:
10.2989/16073606.2025.2557863
Author(s):
Keywords:
54A05, 54D30, 54E35, 54E40, 54E45, 54E99, Metric space, non-expansive map, asymptotic center, Opial’s condition, approach space, contraction, limit operator, adherence operator, compactness, ultrafilter-compactness, filter-compactness, ultrafilter-closure, filter-closure, ultrafilter-separated, preservation under subspace, product and coproduct, preservation by maps, one point ultrafilter-compactification,