Assertion: rational number | /r/HasProperty | countable
Facets:
Source sentences:
text: Rational numbers are countable
text: But, as reals are uncountable and rationals are countable thus, irrationals will be uncountable.
text: The German mathematician Georg Cantor proved this definitively in the 19th century, showing that the rational numbers are countable but the real numbers are uncountable.