Geodesic
A closed separable subspace not being a retract of $\beta N$
Commentationes Mathematicae Universitatis Carolinae, Tome 25 (1984) no. 2, pp. 364-365 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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Classification : 54D35 
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     title = {A closed separable subspace not being a retract of $\beta N$},
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Simon, Petr. A closed separable subspace not being a retract of $\beta N$. Commentationes Mathematicae Universitatis Carolinae, Tome 25 (1984) no. 2, pp. 364-365. http://geodesic.mathdoc.fr/item/CMUC_1984_25_2_a17/

[M] D. Maharam: Finitely additive measures on the integers. Sankhya, Ser. A, Vol. 38 (1976), 44-59. | MR | Zbl

[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