Category:Rational Extension in Plane
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This category contains results about Rational Extension in Plane.
Let $\struct {\R^2, \tau_d}$ be the real number plane with the usual (Euclidean) topology.
Let $D$ denote the set:
- $D := \set {\tuple {x, y}: x \in \Q, y \in \Q}$
where $\Q$ denotes the set of rational numbers.
Let $\BB$ be the set of sets defined as:
- $\BB = \set {\set x \cup \paren {U \cap D}: x \in U \in \tau_d}$
Let $\tau'$ be the topology generated from $\BB$.
$\tau'$ is referred to as the rational extension in the plane.
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