Kwivsithuba esivulekileyo se-vector space, (i-vector space ngesiNgesi) (i-vector ngumgca ovulekilleyo ekupheleni kwawo) i-dimension iyalingana ne-cardinality okanye nenani lezalathini zee-vectors okanye ezemigca. Ikwalingana nenani lelona qela likhulu lomgca wezalathini ongqalileyo okwesosithuba sivulekileyo. Izinto ""eziqhelekileyo"" kubomi bethu bemihla ngemihla bubonakaliswa ngee-dimensions ezintathu, ezibizwa ngokuba bubude, ubukhulu emacaleni, kunye nobunzulu. Kwa-mathematika esi sigama sibizwa ngegama elithi Euclidean space.