Asgellel

Deg tenzeggit , Tigni neɣ Tizwi d akat n tuẓẓma n twinest neɣ n tuzza. Ma d tigni n kra n umtiweg iga d tizzungeltis . Tuzza tla (tesɛa) tigni n 0, ma d tagra timifedg usdid ila tigni n 1.

Amtiweg amazzay ila amili agaman i wemsel neɣ i tigni, Asemdu n webralmas isselfaw-d tamerruzt tasbegsant . S tusnak, tigni tettwafek-d s:

anda a {\displaystyle a} d b {\displaystyle b} gan d izenzaren n waggad d usafaylu n umtiweg, s umdafar, d o ε {\displaystyle o\!\varepsilon \,\!} iga d ’ aɣwali uɣmir . Tamawaẓt d taɣbelt deg tegʷnit n umtiweg amengi seg tneẓẓi tayiwnit, dɣa tga d tasɣent n imezgi aldayan aseddayan , G {\displaystyle G} , n tallit n tuzzya T {\displaystyle T} yakk n tneẓẓi ρ {\displaystyle \rho } . Akken i tella daɣen tigni tis snat, f' (tikwal tettwasezmel « n ») :

Ẓeṛ daɣen