Amḍan n wuṛeɣ

assaɣ a/b yegda-d amḍan n wuṛeɣ $\phi$ (phi)

Amḍan n wuṛeɣ d taẓunt, tettwasbadu s tanzeggit, am wassaɣ awḥid a/b i yellan gar sin n teɣziwin a akked b am akken assaɣ n timernit a + b ɣef tinna meqqren akk (a) atili tegda ar tinna meqqren (a) ɣef tinna mecṭuḥen (b), yettwaru s tenfalit agi :

$\frac{a+b}{a}=\frac{a}{b}$ akked $\frac{a}{b}=\phi$

Amḍan armeɣẓan-agi d tifrat tawḥidt yufraren ar tugda ${\phi }^2=\phi +1$, yegda-d : $\phi =\frac{1+\sqrt{5}}{2}\approx 1,6180339887.$