Definition 3.11.1 ($\s$-Compact).label Let $X$ be a topological space, then $X$ is $\s$-compact if there exists $\curl{K_n}_{1}^{\infty}\suf \cali{P}(X)$ compact such that $X=\cups{}{n\in \N^+}K_{n}$
Definition 3.11.1 ($\s$-Compact).label Let $X$ be a topological space, then $X$ is $\s$-compact if there exists $\curl{K_n}_{1}^{\infty}\suf \cali{P}(X)$ compact such that $X=\cups{}{n\in \N^+}K_{n}$
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