Geodesic
Spaces with $\sigma$-$n$-linked topologies as special subspaces of separable spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 40 (1999) no. 3, pp. 561-570.

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We characterize spaces with $\sigma$-$n$-linked bases as specially embedded subspaces of separable spaces, and derive some corollaries, such as the $\bold c$-productivity of the property of having a $\sigma$-linked base.
Classification : 54B10, 54C25, 54D65, 54D70
Keywords: separable; c.c.c.; $\sigma$-centered base; $\sigma$-$n$-linked base; $I_n$-em\-bed\-ding; $I_{<\omega}$-em\-bed\-ding; product; Martin's Axiom; $C_p$-spaces 
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     title = {Spaces with $\sigma$-$n$-linked topologies  as special subspaces of separable spaces},
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Levy, Ronnie; Matveev, Mikhail. Spaces with $\sigma$-$n$-linked topologies  as special subspaces of separable spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 40 (1999) no. 3, pp. 561-570. http://geodesic.mathdoc.fr/item/CMUC_1999__40_3_a14/