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Results tagged with gn.general-topology
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user 153597
Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.
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The cardinal of the closure of a set in a topological space
Suppose $E$ is a Hausdorff topological space, $A$ is a subset of $E$. Card(A) is the cardinal of $A$. $\bar{A}$ is the closure of $A$. Do we have
$Card(\bar{A})\le 2^{2^{Card(A)}}$.
- 11