Jyotihshastra: Astral and Mathematical Literature c4.s2.41

c4.s2.41

Probably also in the eighth century, though perhaps in the early ninth, Lalla composed his Śiṣyadhīvṛddhidatantra⁵⁷ following the Āryapakṣa, but with bījas for periods of 250 years subsequent to 498 (the numerators of some of these bījas are borrowed from Haridatta, who wrote in 683). Lalla may have lived in Daśapura in Mālava, which he mentions (SDV 2, 9, 10). His approximate date is indicated by his initial bīja-period, which ends in 748; by his sharing with the Pauliśasiddhānta and the Sūryasiddhānta the Brāhmapakṣa's divisions of a Mahāyuga while retaining Āryabhaṭa's parameters; and by the new organization of the siddhānta that he introduced and that was imitated by Vaṭeśvara, who wrote his VS in 904, and, in part, by Śrīpati⁵⁸ when he wrote his SŚŚ toward the middle of the eleventh century. This new organization of the siddhānta retained essentially the contents of the BSS's Daśādhyāyī in a first section on computation (grahaṇita), while gathering theoretical and cosmological material in a second section (gola). The ŚDV was commented on by Bhāskara⁵⁹ (b. 1114) and by Mallikārjuna Sūri⁶⁰—probably he who commented on the Sūryasiddhānta in 1178 in Sanskrit, and previously in Telugu. Thus Lalla’s work, as is to be expected of one belonging to the Ārya-pakṣa, was popular in the South; but the presence of manuscripts in Western India and the references to Lalla in, for instance, Āmarāja’s commentary on the Kh, show that it was also studied in Gujarāt and Rājasthāna.