Liouville number (suomeksi)

Määritelmät:

(lb, en, number theory) An irrational number ''x'' with the property that, for every positive integer ''n'', there exist integers ''p'' and ''q'' with ''q'' > 1 and such that $0< \left , x- \frac{p}{q} \right, < \frac{1}{q^{n).$