Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the cardinality of the $\theta$-closed hull of sets II   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}.

36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio