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Simon, Petr
A closed separable subspace not being a retract of $\beta N$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 25 (1984), issue 2, pp. 364-365
MSC: 54D35
References:
[M] D. Maharam: Finitely additive measures on the integers. Sankhya, Ser. A, Vol. 38 (1976), 44-59. MR 0473132 | Zbl 0383.60008
[S] A. Szymański: Some applications of tiny sequences. to appear.
[T] M. Talagrand: Non existence de relèrement pour certaines mesures finiement additives et retractés de $\beta N$. Math., Ann. 256 (1981), 63-66. MR 0620123
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