(Σπόρος; Spóros) or Porus (Πόρος; Póros). It is unclear whether the two individuals of this name living around AD 200 are in fact the same person (v. ). S. or Porus wrote a (lost) compilation, Κηρία (Keria), with extracts on the quadrature of the circle and the duplication of the cube [4. 226]. He criticized Archimedes'  approximation of the number pi (thus [1. 258,22]), provided his own solution to the problem of the duplication of the cube [1. 76-78; 4. 266-26…
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Folkerts, Menso (Munich) and
Eck, Werner (Cologne),
Brill’s New Pauly, Antiquity volumes edited by: Hubert Cancik and , Helmuth Schneider, English Edition by: Christine F. Salazar, Classical Tradition volumes edited by: Manfred Landfester, English Edition by: Francis G. Gentry.
Consulted online on 18 January 2020 <http://dx.doi.org/10.1163/1574-9347_bnp_brill130020>