On the cardinality of the $\theta$-closed hull of sets II
| Autor: | Cammaroto, Filippo, Catalioto, Andrei, Pansera, Bruno Antonio, Porter, Jack |
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| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The research in this paper is a continuation of the investigation of the cardinality of the $\theta$-closed hull of subsets of spaces. This research obtains new upper bounds of the cardinality of the $\theta$-closed hull of subsets using cardinal functions of $\theta$-bitightness (\cite{Ca-Ko}), finite $\theta$-bitightness (\cite{Ca-Ca-Pa-Ts}) and $\theta$-bitightness small number (\cite{Ca-Ca-Pa-Ts}) of spaces. In the final section, examples of spaces are presented including one that answers a question posed in \cite{Bo-Ca-Ma} and \cite{Bo-Pa}. Comment: This paper has been withdrawn by the author due to an error in chapter 2 |
| Databáze: | arXiv |
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