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Bhojarājā and Bhāskara: Precursors of Karaṇakutūhala algebraic approximation formulas in the Rājamṛgāṅka

  • K. Ramasubramanian
  • Takao Hayashi
  • Clemency Montelle
  • Kim Plofker
Chapter
Part of the Sources and Studies in the History of Mathematics and Physical Sciences book series (SHMP)

Abstract

Telling time by the length of gnomon shadows is a very ancient practice. Prior to the development of spherical cosmological models and accompanying trigonometric techniques in the last few centuries bce, such computations relied on non-trigonometric algorithms approximately relating shadow lengths to time and geographic location.

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Copyright information

© Hindustan Book Agency 2019 and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • K. Ramasubramanian
    • 1
  • Takao Hayashi
    • 2
  • Clemency Montelle
    • 3
  • Kim Plofker
  1. 1.Department of Humanities and Social SciencesIndian Institute of Technology BombayMumbaiIndia
  2. 2.(emeritus) Doshisha UniversityKyotoJapan
  3. 3.Department of Mathematics & StatisticsUniversity of CanterburyChristchurchNew Zealand

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