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

70 BRAHMASPHUṬASIDDHĀNTA & KHAṆḌAKHĀDYAKA
bhaṭa I's midnight system. " In this connection, it must be
remembered that Varāhamihira nowhere expresses his indebted-
ness to Āryabhaṭa I.
The Sūryasiddhānta undoubtedly is the most popular book
on Astronomy in this country. It has been so for the last 1000
years as is seen from the list of commentators on its text (K. S.
Sukla has given a list of 28 commentators includiug those who
wrote commentaries in the South Indian languges like Telugu and
Kannaḍa.) :
Allanarya Suri Maheśvara
Amaredya Mallikārjuna Sūri (1178 A. D.)
Bhaṭṭotpala (966 A. D.) Nārāyaṇa
Bhūdhara (1572 A. D.) Nrsinha Daivajña (b. 1586 A.)
Bhūtiviṣṇu Nṛsiṃhadeva
Caṇḍeśvara (1178) Parameśvara (1432 A. D.)
Cola Rāghava Śarmā (1592 A. D.)
Dādābhai (1719 A. D.) Rāmakṛṣṇa Ārādhya (1472 A. D.)
Devīdāsa Raṅganātha (1603 A. D.)
Kamala Kara Daneśvarah Sārvabhauma
(1618 A. D.)
Kāmabhaṭṭa Tamma Yajva (1599 A. D.)
Kṛṣṇa Daivajña Yallaya (1472 A. D.)
Madanapāla Viśvanātha (1628 A. D.)
Mādhavācārya
A large number of astronomical books in this country were
written on the basis of the Sūryasiddhānta, as the Gaṇakānanda
by Sūrya (1387-1447 A. D.), Gaṇitādarśa by Dharmapathin,
Makaranda Sāriṇī by Makaranda (1478 A D.), Grahacakra by
Kucanācārya (1299 A.D.), Viṣṇukaraṇa by Viṣṇu (1556 A.D.)
besides many others with indefinite dates such as the Sūrya-
siddhānta nayana-prakāraḥ, Sūryasiddhānta-gaṇita Sūryasid-
dhānta-saṃgraha by Viśvanātha Suri, and Sūryasiddhānta Sāriṇī
by Rāmadatta Daivajña. K. S. Sukla has given a list of this
literature in his Introduction to the Sūryasiddhānta.
(iv) Period of Bhāskara I : The author cr the compiler
ot the Sūryasiddhānta is not known nor its date of composition.
Bhāskara and Brahmagupta are the brilliant names of a contem-
porary period. Bhāskara I lived in the seventh century of the
Christian era and was a contemporary of Brahmagupta (628