Definition:Rationally Expressible Number

From ProofWiki
Jump to navigation Jump to search


A number is rationally expressible if and only if its square is rational.

Thus, the set of the rationally expressible numbers is:

$\set {x \in \R : x^2 \in \Q}$

Linguistic Note

The term rationally expressible was invented by $\mathsf{Pr} \infty \mathsf{fWiki}$.

As such, it is not generally expected to be seen in this context outside $\mathsf{Pr} \infty \mathsf{fWiki}$.

Also see