The maths of India
There seem to have been a conflict of Eras at the time when Aryabhatta flourished. There was the Malava Era in Western Malwa, the Gupta Km known in the Gupta Empire, the Saka Era, the Kalacuri Era and so on all local and tribal eras. Not knowing in which to date his works which was meant for universal use among the Hindu he took up the Kaliyuga Era known to all. But in subsequent ages the Saka Era vp-as adopted by all astronomers in India.
The reason is not far to seek for in India astronomy and astrology were, if not exclusively, very generally studied and professed by the Sakadvipi Brahmins or Scythian priesthood- the old Magii- settled in India from remote ages, for neither the Brahmins or the Buddhists favoured astrologers. Buddha has expressly excluded Astrology from Samyak Ajiva or proper livelihood.
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