He wrote the Polygonal Numbers, Porisms, and Arithmetics, which  latter title in the 3rd century A.D. referred strictly to number  theory.
He wrote the Polygonal Numbers, Porisms, and Arithmetics, which  latter title in the 3rd century A.D. referred strictly to number  theory. The surviving Arithmetics contain over 130 problems of  the type bearing his name -- in one, his age at death, 84, is the  solution. FTP--name this foremost Greek algebrist or the type of  rationally valued equations named after him.
He wrote the Polygonal Numbers, Porisms, and Arithmetics, which  latter title in the 3rd century A.D. referred strictly to number  theory.
Diophantes or Diopantine equation