Tigni
Apparence
![](http://chped.net/https/upload.wikimedia.org/wikipedia/commons/thumb/9/95/An_ellipse_with_auxiliary_circle.svg/200px-An_ellipse_with_auxiliary_circle.svg.png)
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 d gan d izenzaren n waggad d usafaylu n umtiweg, s umdafar, d iga d ’aɣwali uɣmir. Tamawaẓt d taɣbelt deg tegʷnit n umtiweg amengi seg tneẓẓi tayiwnit, dɣa tga d tasɣent n imezgi aldayan aseddayan, , n tallit n tuzzya yakk n tneẓẓi .
Akken i tella daɣen tigni tis snat, f' (tikwal tettwasezmel « n ») :
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