Petosiris to Nechepso
Petosiris to Nechepso is a letter describing an ancient
The technique is known by several names, including the Petosiris Circle,[4] the Sphere of Apuleius, Columcille's Circle, and Democritus's Sphere. The attribution of ancient authors is a typical practice of Neoplatonism and Gnosticism, and the technique may arise from this tradition. Examples of the figure are known from Anglo-Saxon manuscripts.[5]
The technique involves calculating the numerical value of a patient's name, then dividing by 30 or 29, a number derived from the lunar month to find the remainder, which is (mod 29) or (mod 30) in modular arithmetic. The number is then found on the diagram, to determine the prognosis.[6]
See also
- Computus
References
- ^ Kalesmaki, Joel. "Types of Greek Numerology". Retrieved 2009-06-26.
- ^ Smith, William, ed. (1870). "Petosiris". Dictionary of Greek and Roman Antiquities. Retrieved 2009-06-26.
- OCLC 155903264.
- .
- ^ Rust, Martha Dana (1999). "Art of Beekeeping Meets the Arts of Grammar: A Gloss of "Columcille's Circle"". Philological Quarterly. 78.
- ISBN 9781888456059.
Bibliography
- Fuentes González, Pedro Pablo, “Néchepso-Pétosiris”, in R. Goulet (ed.), Dictionnaire des Philosophes Antiques, vol. IV, Paris, CNRS, 2005, p. 601-615.
External links
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