INTRODUCTION xix and resembles, in diction and treatment, his Aryabhatiya-bhasya. It is in this work that Nilakantha gives the actual date of his birth (see below, p. xxiii). 8. Grahananirnaya, a work on the computation of lunar and solar eclipses. Manuscripts of this work are yet to be discovered, but later authors and Nilakantha himself in his ABhBhn$ya quote from this work; cf. m I tosht*^ § fe^q^feTOSTFretfTO^sft: qw^cttsfq "refer: ^pNttr^ u (TSS 185, p. 102) These verses are quoted also by Saiikara in his commentary on Nilakanfha's Tantrasahgraha (on ch. IV, verse 27, TSS 188, p. 107) with the introductory remark : HfsfcTJT^'^r ^wf^Ft I 9. Sundararajaprasnottara. Sundararaja, son of Ananta- narayana, was an astronomer of the Tamil country contemporaneous with Nilakantha and author of a detailed commentary on Vnkyakarana or Vakyapancudhyayi which is a manual on the basis of which almanacs in the Tamil districts are computed. 1 Sundararaja had the greatest respect for Nilakantha whom he addressed for clarification of certain points in astronomy. Nllakantha's detailed answers to these questions formed a regular work, Sundararajaprasnottara. Manuscripts of this work are yet to come to light, but both authors refer to this work. Sundararaja in his commentary on the last verse of ch. V of the Vakya- karana says 2 : 1. Cr. ed. by T.S. Kuppanna Sastri and K.V. Sarma, K.SR, Inst., Madras, 1962. 2. Ibid., p. 119.
