Ameccaq

Ameccaq neɣ Astum gar n sin n wagazen d teɣzi n uzerrig amaɣad gar n sin n wagazen-a. Tikwal tettili-d tenfalit ɣef umeccaq s yirem n wakud issefken i wakken ad tiddel s tikli neɣ s temseddut (aɣanib-a yeṭṭafar isemrasen iyalassen. maca mači ussniwen, acku ur yelli ara d ufrin). Dɣa tafat tettwasled deg wanecta acku tazzla-ines d timbeddit (s unect n tiẓri tamassaɣt) ɣef wanecta i ttwasidnen imeccaqen isnallunen s ifawatayen (ameccaq i tetteddu tafat deg useggas) s talɣa tussnant.

Ameccaq yettwasnes deg ufaris (Tallunt × Tallunt) ar wuṭṭunen imdettiyen ilawen, ayen yennumken asnas yeqqnen yal sin n wagazen deg tallunt s wuṭṭun imdetti ilaw. Asnas-a ittfaras-d timentilin-a:

• $\mathrm{\forall }(x,y)\in E^2:d(x,y)=d(y,x)$ (arawas)
• $\mathrm{\forall }(x,y)\in E^2:d(x,y)=0\iff x=y$ (abeṭṭay)
• $\mathrm{\forall }(x,y,z)\in E^3:d(x,z)\le d(x,y)+d(y,z)$ (Tanmeglit takeṛdisant)