Tetraktis
Tetraktis (bahasa Yunani: τετρακτύς), atau tetrad,[1] atau tetraktis decad[2] adalah sebuah figur segitiga yang terdiri dari sepuluh titik yang dijajarkan dalam empat baris: satu, dua, tiga, dan empat pada setiap baris, yang merupakan representasi geometri dari bilangan segitiga keempat. Sebagai simbol mistik, tetraktis sangat berpengaruh pada pemujaan rahasia Pythagoreanisme. Terdapat empat musim, dan bilangan tersebut juga diasosiasikan dengan gerak planetarium dan musik.[3]
Referensi
- ^ The Theosophical Glossary, hlm. 302
- ^ Eduard Zeller. Outlines of the History of Greek Philosophy (Edisi 13). hlm. 36.
- ^ Dimitra Karamanides (2005), Pythagoras: pioneering mathematician and musical theorist of Ancient Greece, The Rosen Publishing Group, hlm. 65–65
Bacaan tambahan
- von Franz, Marie-Louise. Number and Time: Reflections Leading Towards a Unification of Psychology and Physics. Rider & Company, London, 1974. ISBN 0-09-121020-8
- Fideler, D. ed. The Pythagorean Sourcebook and Library Diarsipkan 2015-05-09 di Wayback Machine.. Phanes Press, 1987.
- The Theoretic Arithmetic of the Pythagoreans – Thomas Taylor
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