Sridhara

Śrīdhara or Śrīdharācārya (8th–9th century) was an Indian mathematician believed to come either from the Bengal region or from South India. Very little is known about his life beyond the content of his two extant treatises about arithmetic, ''Pāṭī-gaṇita'' and ''Tri-śatikā''. He was mentioned by Bhāskara II (12th century), and made apparent reference to Brahmagupta (7th century). Govindasvāmin (9th century) quoted a passage also found in ''Tri-śatikā'', and overlapping material is found in the work of Mahāvīra (9th century), from which historians estimate Śrīdhara to have lived in the 8th or 9th century. Provided by Wikipedia