• From Hipparchus to a Helix Ruler

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/reso/017/01/0044-0052

    • Keywords

       

      Chord function; Babylonian; helix ruler; Hipparchus; Ptolemy; Almagest; epicycle; deferent; trignometry.

    • Author Affiliations

       

      Jerold Mathews1

      1. 2230 Hamilton Drive Ames, IA 50014, USA
    • Dates

       

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