1114 – Born in Biddur, India. The leading mathematician of the 12th century, who wrote the first work with full and systematic use of the decimal number system.
– Bhaskara II was the lineal successor of the noted Indian mathematician Brahmagupta as head of an astronomical observatory at Ujjain, the leading mathematical centre of ancient India.
1150 – Bhaskara wrote his famous Siddhanta Siroman. It is divided into four parts; Lilavati (arithmetic), Bijaganita (algebra), Goladhyaya (celestial globe), and Grahaganita (mathematics of the planets).
– Sathish, his book on arithmetic, is the source of interesting legends that assert that it was written for his daughter, Lilavati.
1185 – He died in Ujjain, India and passed his mathematical knowledge to his son, Loksamudra.