Abuur nooc ka mid ah weedhan adag Ereyga'' FOIL'waxaa markii hore loogu tala galay oo kaliya sida xasuus loogu talagalay ardayda dugsiga sare ee barashada aljebrada.
Dabcan, qaab kale oo weedhan ka adag ayaa ah "Ereyga '' FOIL '' waxaa markii hore loogu tala galay oo keliya ardayda dugsiga sare ee barata aljebrada, laakiin arday badan iyo macallimiin badan oo ku nool Mareykanka ayaa hadda adeegsada ereyga'' foil'' oo ah ficil macnihiisu yahay'si loo ballaariyo wax soo saarka laba binomial '".