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

74 BRĀHMASPHUṬA SIDDHĀNTA & KHAṆḌAKHĀDYAKA The classification of the contents of Astronomy in adhikāras appears to be the original concept of Brahmagupta; this system was to some extent adopted in the modern Sūrya-Siddhānta in the case of a few chapters. The Vaṭeśvara-Siddhānta by Vaṭeś- varācārya (born 802 Śaka or 880 A.D. in Ānandapura city, Punjab, son of Mahādatta) also adopts the terminology : Madhya- madhikāra, Spaṣṭādhikāra and Tripraśnādhikāra. We owe this type of caption-nomenclature to Brahmagupta. Contents of the Brahmasphuṭasiddhānta Now we shall summarise the contents of the Chapters of this great treatise and also enumerate the number of verses in each chapter. The author has himself given the total number of verses in the Chapter in the ending verse of each chapter. Some- times, the verse specifying this number itself is not taken into account while giving the total number of verses in that chapter, and therefore, there occurs a minor discrepancy in the actual number and the number specified by the author himself. The following table records both these numbers separately : ${cccc} & & Number of & Actual num- Chapter & Title & verses indi- & ber of verses & & cated by the & & & author & $ PŪRVA-DAŚĀDHYĀYĪ (First Ten Chapters) $I$ \quad Madhyamādhikāraḥ (Madh- \qquad yamagati-radhyāyaḥ) \qquad\qquad\qquad\quad 63 \qquad\qquad\quad 63 $II$ \quad Spaṣṭādhikāraḥ (Sphuṭagati- \qquad radhyāyaḥ) \qquad\qquad\qquad\qquad\qquad 67 \qquad\qquad\quad 68 $III$ \quad Tripraśnādhikāraḥ (Tripraś- \qquad nādhyāyaḥ) \qquad\qquad\qquad\qquad\quad 66 \qquad\qquad\quad 66 $IV$ \quad Candragrahaṇādhikāraḥ \qquad (Candragrahaṇādhyāyaḥ) \qquad\qquad\quad 20 \qquad\qquad\quad 20 $V$ \quad Sūryagrahaṇādhikāraḥ \qquad (Ārka-grahaṇam or Ravigra- \qquad\quad 26 \qquad\qquad\quad 27 \qquad haṇādhyāyaḥ) $VI$ \quad Udayāstādhikāraḥ \qquad (Udayāstamayādhyāyaḥ) \qquad\qquad\quad 12 \qquad\qquad\quad 13