ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

CONCORDANCE OF WORKING RULES 309 Also MBh. IV. 56-57 ; SiŚe. III. 59 ; ŚiDVṛ. I. ii. 42 ; 35. A rule for converting true distances known in min- utes into true distances into yojanas : for example : Sun's true distance in yojanas Sun's mean distance in yojanas × Sun's true dist. in minutes —————————————————————————————————————————— Radius BrSpSi. XXI. 31 (ii). Also MBh. V. 3 ; ŚiDVṛ. I. iv. 5 (i) ; LBh. IV. 3 ; SiŚe. V. 4 (ii) ; SiŚi I.v. 5 (i) ; 36. Rule for finding angular diameters of the Sun and the Moon : BrSpSi. XXI. 34 (ii) ; Also MBh. V. 5 : ŚiDVṛ. I. iv. 8 ; SiŚe. V. 6 ; SiŚi. I. v. 7, 37. Formulae for the true (i. e. angular) diameters of the Sun, the Moon and the shadow in terms of the true daily motions of the Sun and the Moon (Here by shadow is meant the section of the cone of the Earth's shadow at the Moon's distance.) : BrSpSi. IV. 6 (i) : KK. IV. 2 (i). Also MBh. V. 6-7 ; ŚiDVṛ. I. iv. 9 ; MSi. V. 5 (ii) ; SiŚe V. 9 ; SiŚi. I. v. 8-9 ; 38. Rule for finding the spaṣṭa-valana (resultant valana) for the circle drawn with half the sum of the diameters of the eclipsed and eclipsing bodies as radius : BrSpS.. IV. 18 (i). Also MBh. V. 46 ; ŚiDVṛ. I. iv. 26. 39. Method for calculating the phase of the eclipse for the given time : BrSpSi. IV. 11-12. Also MBh. V. 62-63 ; ŚiDVṛ. I. iv. 19-20 ; SiŚe. V. 14. 40. Rule for the determination of the diameter of the shadow i.e., the diameter of the Section of the Earth's shadow where the Moon crosses it : BrSpSi. XXIII. 8-9. Also MBh. V. 71-73 ; Āryc. IV. 39-40 ; ŚiDVṛ. I. iv. 6 (ii)-7. 41. Process of successive approximations in connection with calculations of a lunar eclipse : BrSpSi. IV. 8-9. Also MBh. V. 75-76 ; LBh. IV. 10-12 ; ŚiDVṛ. I. iv. 14-16 SiŚe. V. 12-13; SiŚi. I, v. 12-13.