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  2. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    The golden ratio φ and its negative reciprocal −φ −1 are the two roots of the quadratic polynomial x 2 − x − 1. The golden ratio's negative −φ and reciprocal φ −1 are the two roots of the quadratic polynomial x 2 + x − 1. The golden ratio is also an algebraic number and even an algebraic integer.

  3. Electronic Vaccination Data System - Wikipedia

    en.wikipedia.org/wiki/Electronic_Vaccination...

    The Electronic Vaccination Data System (EVDS) is a digital platform developed by the National Department of Health of the South African government to manage the country's COVID-19 vaccination program. Enrolment is currently available for everyone over the age of 12 [3] and the platform can also generate a digital vaccine certificate. [4]

  4. Fibonorial - Wikipedia

    en.wikipedia.org/wiki/Fibonorial

    Here the fibonorial constant (also called the fibonacci factorial constant [1]) is defined by = = (), where = and is the golden ratio. An approximate truncated value of C {\displaystyle C} is 1.226742010720 (see (sequence A062073 in the OEIS ) for more digits).

  5. 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 ...

  6. Vaccine passport - Wikipedia

    en.wikipedia.org/wiki/Vaccine_passport

    International Certificate of Vaccination or Prophylaxis, also known as Carte Jaune or Yellow Card, a vaccination certificate issued by the World Health Organization Vaccine passports during the COVID-19 pandemic , a type of immunity passport specific to the COVID-19 pandemic

  7. Fibonacci word fractal - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_word_fractal

    The Fibonacci word fractal is a fractal curve defined on the plane from the Fibonacci word. Definition ... the golden ratio. Generalizing ...

  8. National digital vaccine card aims to ease proof of ... - AOL

    www.aol.com/news/national-digital-vaccine-card...

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  9. Fibonacci sequence - Wikipedia

    en.wikipedia.org/wiki/Fibonacci_sequence

    Fibonacci numbers are also strongly related to the golden ratio: Binet's formula expresses the n-th Fibonacci number in terms of n and the golden ratio, and implies that the ratio of two consecutive Fibonacci numbers tends to the golden ratio as n increases. Fibonacci numbers are also closely related to Lucas numbers, which obey the same ...