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  2. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    This is a proof by infinite ... Le Corbusier's faith in the mathematical order of the universe was closely bound to the golden ratio and the Fibonacci series, which ...

  3. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Since the conversion factor 1.609344 for miles to kilometers is close to the golden ratio, the decomposition of distance in miles into a sum of Fibonacci numbers becomes nearly the kilometer sum when the Fibonacci numbers are replaced by their successors. This method amounts to a radix 2 number register in golden ratio base φ being shifted. To ...

  4. Logarithmic spiral - Wikipedia

    en.wikipedia.org/wiki/Logarithmic_spiral

    The golden spiral is a logarithmic spiral that grows outward by a factor of the golden ratio for every 90 degrees of rotation (pitch angle about 17.03239 degrees). It can be approximated by a "Fibonacci spiral", made of a sequence of quarter circles with radii proportional to Fibonacci numbers.

  5. Random Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Random_Fibonacci_sequence

    It demonstrates that the Fibonacci numbers grow at an exponential rate equal to the golden ratio φ. In 1960, Hillel Furstenberg and Harry Kesten showed that for a general class of random matrix products, the norm grows as λ n, where n is the number of factors. Their results apply to a broad class of random sequence generating processes that ...

  6. Generalizations of Fibonacci numbers - Wikipedia

    en.wikipedia.org/wiki/Generalizations_of...

    The n-Fibonacci constant is the ratio toward which adjacent -Fibonacci numbers tend; it is also called the n th metallic mean, and it is the only positive root of =. For example, the case of n = 1 {\displaystyle n=1} is 1 + 5 2 {\displaystyle {\frac {1+{\sqrt {5}}}{2}}} , or the golden ratio , and the case of n = 2 {\displaystyle n=2} is 1 + 2 ...

  7. Golden triangle (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Golden_triangle_(mathematics)

    A golden triangle. The ratio a/b is the golden ratio φ. The vertex angle is =.Base angles are 72° each. Golden gnomon, having side lengths 1, 1, and .. A golden triangle, also called a sublime triangle, [1] is an isosceles triangle in which the duplicated side is in the golden ratio to the base side:

  8. Mathematical induction - Wikipedia

    en.wikipedia.org/wiki/Mathematical_induction

    A proof by induction consists of two cases. The first, the base case , proves the statement for n = 0 {\displaystyle n=0} without assuming any knowledge of other cases. The second case, the induction step , proves that if the statement holds for any given case n = k {\displaystyle n=k} , then it must also hold for the next case n = k + 1 ...

  9. Fermat's spiral - Wikipedia

    en.wikipedia.org/wiki/Fermat's_spiral

    The golden ratio and the golden angle. In disc phyllotaxis, ... The angle 137.508° is the golden angle which is approximated by ratios of Fibonacci numbers. [6]