Absolutes of Hausdorff spaces and cardinal invariants $F_{\te}$ and $t_{\te}$}

Filippo Cammaroto, Andrei Catalioto, Jack Porter

Published 2012-06-28, updated 2012-12-17Version 2

This article extends the recent study of the cardinal functions $F_{\theta}$ and $t_{\theta}$ for H-closed Urysohn spaces and the research of I. Bandlov and V.I. Ponomarev on tightness type of absolutes. In particular, basic results are obtained and used to study the relationships among the cardinal functions $t$, $t_{\theta}$, $F$ and $F_{\theta}$ in the context of Iliadis and Banaschewski absolutes of Hausdorff spaces.