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  2. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    The ratio of Fibonacci numbers ⁠ ⁠ and ⁠ ⁠, each over ⁠ ⁠ digits, yields over ⁠ ⁠ significant digits of the golden ratio. The decimal expansion of the golden ratio ⁠ φ {\displaystyle \varphi } ⁠ [ 1 ] has been calculated to an accuracy of ten trillion ( ⁠ 1 × 10 13 = 10,000,000,000,000 {\displaystyle \textstyle 1\times ...

  3. Non-integer base of numeration - Wikipedia

    en.wikipedia.org/wiki/Non-integer_base_of_numeration

    However, even finite β-expansions are not necessarily unique, for example φ + 1 = φ 2 for β = φ, the golden ratio. A canonical choice for the β -expansion of a given real number can be determined by the following greedy algorithm , essentially due to Rényi (1957) and formulated as given here by Frougny (1992) .

  4. Golden ratio base - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio_base

    Golden ratio base is a non-integer positional numeral system that uses the golden ratio (the irrational number + ≈ 1.61803399 symbolized by the Greek letter φ) as its base. It is sometimes referred to as base-φ , golden mean base , phi-base , or, colloquially, phinary .

  5. 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 ...

  6. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    For example, the constant π may be defined as the ratio of the length of a circle's circumference to its diameter. The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set.

  7. Fibonacci word - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_word

    Example: 01S 4 = 0101001010 is a palindrome. The palindromic density of the infinite Fibonacci word is thus 1/φ, where φ is the golden ratio: this is the largest possible value for aperiodic words. [3] In the infinite Fibonacci word, the ratio (number of letters)/(number of zeroes) is φ, as is the ratio of zeroes to ones. [4]

  8. 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 ...

  9. Lucas number - Wikipedia

    en.wikipedia.org/wiki/Lucas_number

    Individual numbers in the Lucas sequence are known as Lucas numbers. Lucas numbers and Fibonacci numbers form complementary instances of Lucas sequences . The Lucas sequence has the same recursive relationship as the Fibonacci sequence, where each term is the sum of the two previous terms, but with different starting values. [ 1 ]