Biographical Sketches of Dekkan Poets/Yallaya
Yallaya was a native of the town of Vijayanagram, and lived in the year of Saiivahana 1390, while Virupaksha Roya was king of Anagondi, this individual was an adept in Astrology and Astronomy, to which Sciences he regularly applied from his very infancy. He wrote several treatises on Astronomy, and among them a commentary on the solar system called Surya, Sedhanta. This work is in great repute throughout the Indian Peninsula, and from it all calculations are made in framing Almanacks. Yallaya did not cultivate any other branch of the Sciences except Astrology and Astronomy. He died at Vijayanagram.