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The countable character of X in \(\beta\) X compared with the countable character of the diagonal in X\(\times X\). (English. Russian original) Zbl 0652.54003
Mosc. Univ. Math. Bull. 42, No. 5, 14-17 (1987); translation from Vestn. Mosk. Univ., Ser. I 1987, No. 5, 16-19 (1987).
See the review in Zbl 0637.54003.

MSC:
54A25 Cardinality properties (cardinal functions and inequalities, discrete subsets)
54D35 Extensions of spaces (compactifications, supercompactifications, completions, etc.)
54D20 Noncompact covering properties (paracompact, Lindelöf, etc.)
Citations:
Zbl 0637.54003
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