Bharatiya Jyotihshastra (History of Indian Astronomy), translated by R. V. Vaidya v2.c12.s2.t30.2

v2.c12.s2.t30.2

He has written a commentary on Brahmagupta's *Khaṇḍakhādya*. It has adopted chiefly Śaka 962 for solving examples, and this shows his date to be about the same year. The commentary shows him to be a resident of a village named something like ‘Cārayyāt’ in the area ‘Uruṣa’ region, near Kaśmīr. The position of the place has been mentioned by him as latitude 34°22′ and longitude equal to 99 yojanas, east of Ujjayinī meridian (i.e. about 7½° or 450 miles).