Definition:Bounded Region of Plane

Definition

Let $D \subseteq \R^2$ be a subset of the plane.

$D$ is bounded if and only if there exists a circle in the plane which completely encloses $D$.

Sources

• 1963: Morris Tenenbaum and Harry Pollard: Ordinary Differential Equations ... (previous) ... (next): Chapter $1$: Basic Concepts: Lesson $2 \text C$: Function of Two Independent Variables: Definition $2.69$