Weierstrass, Cantor, e Heine darnu narre maɓɓe dow tokkootire ɗe ngalaa keerol, nden Dedekind heɓi ɗum muuɗum dow anndal taƴoode (Schnitt) nder ɗatal limɗe ɗe goonga, sennduki fuu limɗe goonga ɗen cuuɗi ɗiɗi ngam e ɗe ngoodi goodane paamaaɗe.