Ninu imo isiro itumo nomba ti s'akomo awon nomba afoyemo bi ida (fraction), nomba apaosi (negative), tikonionka (transcendental) ati nomba tosoro (complex).Awon ona isesiro nomba bi aropo, iyokuro, isodipupo, ati isepinpin ni a n sewadi won ninu eka imo isiro ti a mo si aljebra afoyemo (abstract algebra), nibiti a ti n sewadi awon ona nomba afoyemo bi egbe (group), oruka (ring) ati papa (field).Awon itokasi.. 
1626) 1729 - Goìtànná Ephraim Lessing, German author and Philosopher (d.. 