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

KAYE'S VIEW 145
are imperfect, of Brahmagupta the solutions are more accurate,
while those of Bhāskara are generally mathematically correct.
The date of the scientific ancient Indian Astronomy is indeed
499 A. D., while that of the Syntaxis is about 150 A. D. It is by
these shortcomings and differences in the methods, new ideas (e.g.,
the idea of the differential calculus)* and the like, that we
can safely say that Indian Astronomy in its scientific form,
although of a later date than the "Syntaxis" of Ptolemy, is origi-
nal and not borrowed from foreign source. There is evidence
that some crude form of Greek astronomy was transmitted to
India and went by the name of the "Romaka" or the "Pauliśa"
Siddhānta, prior to the time of Āryabhaṭa but our great Indian
astronomers, Āryabhaṭa with his pupils, Varāha-mihira and
Brahmagupta, had to construct a new science altogether.
(This Chapter is almost a reproduction of the paper by
P. C. Sengupta, as acknowledged earlier).
—: o :—
Reference
P.C. Sengupta : The Khaṇḍakhādyaka, 1934