Fibonacci sequence
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Fibonacci sequence

Fibonacci sequence and its usage. Fibonacci sequence in relationship to the Golden ratio. Weber's law estimations using the sequence.
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Fibonacci sequence


  • Fn = Fn-1 + Fn-2 .
  • Each number is the sum of the two preceding ones, starting from 0 and 1.
  • Is ubiquitous: the tree branches, cauliflower and the curves of the human brain, etc. It’s a phenomena surrounding us everywhere.

Weber’s law

  • The difference we can identify between objects is given by a percentage.
  • For example, if 60% difference can be distinguished in an effort between two estimates, we can distinguish that same percentage difference between other estimates and that is corresponding with the Fibonacci Sequence.
  • Fibonacci values work well because they increase by about the same portion each time.

Golden ratio

  • Golden mean or golden section.
  • Two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.
  • Any two successive Fibonacci Numbers, have ratio very close to the Golden Ratio “φ” which is approximately 1,618034…

Fibonacci sequence / Golden ratio

Resources
wikipedia.org mathsisfun.com wikipedia.org mathsisfun.com mountaingoatsoftware.com productplan.com Jeff Sutherland: Scrum - the art of doing twice the work in half the time

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