Definitions
Wiktionary
- n. geometry The irrational number (approximately 1·618), usually denoted by the Greek letter φ (phi), which is equal the sum of its own reciprocal and 1, or, equivalently, is such that the ratio of 1 to the number is equal to the ratio of its reciprocal to 1.
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ruler function, Cauchy sequence, accumulation point, adherent point, isolated point, Dirichlet function, limit, Banach-Tarski par..., closure, dense, frontier, boundary and 21 more...
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illation, finite, edify, abide, abrade, vouch, amiss, vociferate, perusing, techantiquery, rigamarole, holon and 615 more...
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Types and sets of numbers
natural numbers, integers, rational, surd, irrational, real, imaginary, complex, transcendental, surreal, prime, secant numbers and 53 more...
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Mathematical
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e, asymptote, phi, integral, derivative, fx(dx), tesseract, googol, googolplex, set, dodecahedron, zero and 48 more...
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sionnach In mathematics and the arts, two quantities are in the golden ratio if the ratio between the sum of those quantities and the larger one is the same as the ratio between the larger one and the smaller. The golden ratio is approximately 1.6180339887.
phi = 1 + sqrt(5)/2 Nov 19, 2007
oroboros See phi. Feb 28, 2007