Definition:Euclidean Plane
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Definition
For any real number $a$ let:
- $L_a = \set {\tuple {x, y} \in \R^2: x = a}$
Furthermore, define:
- $L_A = \set {L_a: a \in \R}$
For any two real numbers $m$ and $b$ let:
- $L_{m, b} = \set {\tuple {x, y} \in \R^2: y = m x + b}$
Furthermore, define:
- $L_{M, B} = \set {L_{m, b}: m, b \in \R}$
Finally let:
- $L_E = L_A \cup L_{M, B}$
The abstract geometry $\struct {\R^2, L_E}$ is called the Euclidean plane.
Also see
- Euclidean Plane is Abstract Geometry where this is shown to be an abstract geometry.
Also known as
Some authors use the term Cartesian plane instead of Euclidean plane.
Sources
- 1991: Richard S. Millman and George D. Parker: Geometry: A Metric Approach with Models (2nd ed.) ... (previous) ... (next): $\S 2.1$