पृष्ठम्:सिद्दान्तदर्पणम्.djvu/१८

} 4. A commentary on the Ca71daccldyagarita, added edition of the text (see fn. 2, previous page) to 5. 7antrasaigraha, divided into eight chapters comprising 432 verses. This is a major work of Nilakantha and is an erudite treatise on astronomy. As a work belonging to the 7antra class, it takes the commencement of the Yug८ as the starting point for calculations. In the several chapters, it deals with : I. Astronomical constants and general principles and conceptions . II. Geocentric positions of the planets. II. The Sun's shadow. IV. Eclipses of the Moon and the Sun V. Specialities in the Sun's eclipse . WI. Vyatipata. WI. The Phases of the Moon, etc. VIII. Elevation of the lumar horms the 6. Aryabharya-Bhasya, an elaborate commentary on the cryptic and stra-like text of Aryabhata which comprehends in 121 aryas the fields of Mathematics and Astronomy. A perusal of the commentary will aumply prove that it is no false claim that Nilakantha makes when he designates his work as a '7alhabhasya' and explains the method of exposition adopted by him : श्रीमवार्यभटाचार्यविरचितसिद्धान्त-व्याख्याने ‘महाभाष्ये ' उत्तरभागे युक्तिप्रतिपादनपरे त्यक्तान्यथाप्रतिपत्तौ निरस्तदुव्यख्याप्रपञ्चे समुद्घाटितगूढार्थे सकलजनपदजातमनुजहिते निर्दाशितगीतिपादार्थे सर्वज्योतिषामयनरहस्यार्थनिदर्शके समुदाहृत माधवादि-गणितज्ञाचार्यकृत-युक्तिसमुदाये निरस्ताखिलविप्रतिपत्तिप्रपञ्च-समुपजनितसर्व ज्योतिषामयनविदमलहृदयसरसिजविकासे निर्मले गम्भीरे अन्यूनातिरिक्ते गणितपाद गतार्यात्रयस्त्रिशद्व्याख्यानं समाप्तम् । (7SS 101, p. 180) In another context, recalling how he came to write the commentary, Nज्ञlakantha remarks : मयाद्य प्रवयसा ज्ञाता युक्तीः प्रतिपादयितुं भास्करादिभिरन्यथाव्याख्यातानां कर्माण्यपि प्रतिपादयितुं यथाकथंचिदेव व्याख्यानमारब्धम् । (7SS 101, p. 156) 1. Ed. with the commentary Laghuwhyrt of 5atkara , 188, 1958. 2. Ed. in 7ऽऽ 101, 110, 185 (1930, 1931, 1957) The lucid manner in which the difficult conceptions about the celestial globe and astronomical calculations are made clear, the wealth of quotations, and the results of personal investigations and comparative studies persented herein amply justify the appellation 'Malabldsya which Nilakar0tha has given to his work in 7ऽऽ