Āryabhata and axial rotation of earth

@article{Dutta2006ryabhataAA,
  title={Āryabhata and axial rotation of earth},
  author={Amartya Kumar Dutta},
  journal={Resonance},
  year={2006},
  volume={11},
  pages={56-74}
}
In the first part of this series, we discussed the celestial sphere and Aryabhata’s principle of axial rotation; in this part we shall discuss in detail the concept of sidereal day and then mention Aryabhata’s computations on the duration of sidereal day. 

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In this series of articles, we intend to have a glimpse of some of the landmarks in ancient Indian mathematics with special emphasis on number theory. This issue features a brief overview of some of

The Katapayadi formula and the modern hashing technique

An interestingly similar technique used in South Indian musicology in the 18th century is described, and the question of whether it is an anticipation of the hashing technique is briefly addressed.