William Chen-mertens

activity

20192022

most citedStrong colorings over partitions

5 citations · 5 across the 4 of their papers we have counts for

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math.GN2019

Selectivity properties of spaces

William Chen-Mertens, Paul J. Szeptycki

This paper addresses several questions of Feng, Gruenhage, and Shen which arose from Michael's theory of continuous selections from countable spaces. We construct an example of a s…

math.GN2019

The effect of forcing axioms on the tightness of the $G_{δ}$ modification

William Chen-Mertens, Paul J. Szeptycki

We show that $PFA$ implies that the tightness $t (X_{δ})$ of the $G_{δ}$ -modification of a Fréchet $α_{1}$ -space $X$ is at most $ω_{1}$ , while $□ (κ)$ implies that there is a Fré…

Selectivity properties of spaces

The effect of forcing axioms on the tightness of the Gδ​ modification

The effect of forcing axioms on the tightness of the $G_{δ}$ modification