Definition:Closed Region
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Definition
Complex Analysis
Let $D \subseteq \C$ be a subset of the set of complex numbers.
$D$ is a closed region if and only if $D$ the closure of an open region.
Closed Region in the Plane
A closed region is a region complete with its boundary.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): closed region
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): closed region