Geodesic
Forcing tightness in products of fans
Fundamenta Mathematicae, Tome 150 (1996) no. 3, pp. 211-226

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

We prove two theorems that characterize tightness in certain products of fans in terms of families of integer-valued functions. We also define several notions of forcing that allow us to manipulate the structure of the set of functions from some cardinal θ to ω, and hence, the tightness of these products. These results give new constructions of first countable that are not ≤θ-cwH.
DOI : 10.4064/fm-150-3-211-226

Jörg Brendle 1 ; Tim LaBerge 1

1 
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Jörg Brendle; Tim  LaBerge. Forcing tightness in products of fans. Fundamenta Mathematicae, Tome 150 (1996) no. 3, pp. 211-226. doi: 10.4064/fm-150-3-211-226

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