A. Bella

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20012020

most citedWeak extent, submetrizability and diagonal degrees

19 citations · 33 across the 15 of their papers we have counts for

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Showing 2011 · math.GNShow all

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math.GN2011★ 19 cited

Weak extent, submetrizability and diagonal degrees

D. Basile, A. Bella, G. J. Ridderbos

We show that if $X$ has a zero-set diagonal and $X^{2}$ has countable weak extent, then $X$ is submetrizable. This generalizes earlier results from Martin and Buzyakova. Furthermore…

math.GN2011

Variations of selective separability II: discrete sets and the influence of convergence and maximality

Angelo Bella, Mikhail Matveev, Santi Spadaro

A space $X$ is called selectively separable(R-separable) if for every sequence of dense subspaces $(D_{n} : n \in ω)$ one can pick finite (respectively, one-point) subsets $F_n\subset…