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Results tagged with gn.general-topology
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user 54463
Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.
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open subsets of boundary [closed]
Let $\bar{X}$ be a Hausdorff and compact topological space. Suppose that $X$ is an open and dense subset of $\bar{X}$. Let $\nu X=\bar{X}\setminus X$ and assume that $U\subseteq \nu X$ is an open subs …
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