Tetrad (Greek philosophy)
- Tetrad (Greek philosophy)
The tetrad or number four is the first number formed by the addition and multiplication of equals. To the Pythagoreans, this symbol and number represented justice as it is the first number that is divisible every way into equal parts. [Hemenway, Priya. "Divine Proportion: Phi In Art, Nature, and Science". Sterling Publishing Company Inc., 2005. ISBN 1-4027-3522-7, p. 55]
ee also
*Monad
*Dyad
*Triad
*Pentad
*Decad
*Iamblichus of Chalcis
*Tetractys
References
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Dyad (Greek philosophy) — The Dyad is a title used by the Pythagoreans for the number two, representing the principle of twoness or otherness . Numenius said that Pythagoras gave the name of Monad to God, and the name of Dyad to matter.[1][Need quotation to verify]… … Wikipedia
Pentad (Greek philosophy) — The pentad was a Pythagorean term for the number five. A pentagram, symbol of the pentad, was used by the as a secret sign to recognize each other.cite book |author=Ghyka, Matila C. |title=The geometry of art and life |publisher=Dover… … Wikipedia
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Triad (Greek philosophy) — The Triad is a Pythagorean title for the number three. According to Priya Hemenway they considered it the most beautiful number, as it is the only number to equal the sum of all the terms below it, and the only number whose sum with those below… … Wikipedia
Monad (philosophy) — Monad (from Greek μονάς monas, unit from μόνος monos, alone ),[1] according to the Pythagoreans, was a term for Divinity or the first being, or the totality of all beings,[citation needed] Monad being the source or the One meaning without… … Wikipedia
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Pythagoreanism — /pi thag euh ree euh niz euhm/, n. the doctrines of Pythagoras and his followers, esp. the belief that the universe is the manifestation of various combinations of mathematical ratios. [1720 30; PYTHAGOREAN + ISM] * * * Philosophical school,… … Universalium
Hellenistic biological sciences — R.J.Kankinson The five centuries that separate Aristotle’s death in 322 BC from Galen’s ascendancy in Rome in the latter part of the second century AD were fertile ones for the biological sciences, in particular medicine. Nor is the period solely … History of philosophy
Monad — may refer to: Contents 1 Philosophy 2 Mathematics and computer science 3 Music 4 Biology 5 … Wikipedia
