Golden ratio ( $φ$ )

The golden ratio is the positive number

φ = \frac{1 + 5}{2},

which satisfies

φ^{2} = φ + 1

and

1/ φ = φ - 1

.

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Willem Abraham Wythoff

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Golden ratio by

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The Golden Ratio, often denoted by the Greek letter phi (φ), is a special mathematical ratio that is approximately equal to 1.6180339887.

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