Jump to navigation Jump to search
- $(1): \quad$ Each point of $R$ is the center of a circle all of whose elements consist of points of $R$
- $(2): \quad$ Each point of $R$ can be joined by a curve consisting entirely of points of $R$.
- 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 $2.68$
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): Entry: region