Aryabhata II (c. 920 – c. 1000) was an Indian mathematician and astronomer, and the author of the Maha-Siddhanta.
O'Connor, John J.; Robertson, Edmund F., "Aryabhata II", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Aryabhata_II.html .