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A concept of nearness. (English) Zbl 0288.54004

MSC:
54A05 Topological spaces and generalizations (closure spaces, etc.)
54E05 Proximity structures and generalizations
54E15 Uniform structures and generalizations
18A40 Adjoint functors (universal constructions, reflective subcategories, Kan extensions, etc.)
54E99 Topological spaces with richer structures
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