Open Neighborhood

In a topological space , an open neighborhood of a point is an open set containing . A set containing an open neighborhood is simply called a neighborhood.

See also

Neighborhood, Open Set

This entry contributed by Margherita Barile

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Cite this as:

Weisstein, Eric W., with contributions by Margherita Barile. "Open Neighborhood." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/OpenNeighborhood.html

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