Category:Neighborhoods

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This category contains results about Neighborhoods.
Definitions specific to this category can be found in Definitions/Neighborhoods.


Let $A \subseteq S$ be a subset of $S$.

A neighborhood of $A$, which can be denoted $N_A$, is any subset of $S$ containing an open set of $T$ which itself contains $A$.

That is:

$\exists U \in \tau: A \subseteq U \subseteq N_A \subseteq S$

Pages in category "Neighborhoods"

The following 31 pages are in this category, out of 31 total.