Dmitri Ivanovich Mendeleev (also romanized Mendeleyev or Mendeleef;  ) ( - ), was a Russian chemist and inventor.. 
Ipa Descartes ninu Mathiki han kedere; ohun lo ṣẹda siste Àjọpa Àjọsanko Karun—Gba irisi jẹOme laaye lati jẹ gbigbekalẹ̀ ní iṣẹdọ́gba Aljẹbra 