The Astronomical Observatories of Jai Singh c15.s1.t4.12
The Astronomical Observatories of Jai Singh c15.s1.t4.12
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c15.s1.t4.12
¹ Really the differentiation is a geographical one. The Sūrya Siddhānta is the standard authority in the greater part of India, but the first Ārya-Siddhānta is the authority in the Tamil and Malayāḷam countries of Southern India, while Brahmagupta is followed in Gujarāt, Rājputāna and North-West India.