Daɣ abstract algebra, 0 t-axdǎm hǎrkuk i asilmǎd n titbǎqet bǎnnǎn amosǎn titbǎqet n muxid i aziyid ( a fal ijja almǎɣna fal edey eɣbǎlǎn) tolas titbǎqet sas-it i anǎtfǎs ( a fal ija almǎɣna)