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Approximate compactness and Chebyshev sets. (Approximative Kompaktheit und Chebyshevsche Mengen.) (English. Russian original) Zbl 0103.08101
Sov. Math., Dokl. 2, 1226–1228 (1961); translation from Dokl. Akad. Nauk SSSR 140, 522-524 (1961).

MSC:
46A50 Compactness in topological linear spaces; angelic spaces, etc.