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单词 FibonacciFraction
释义

Fibonacci fraction


A Fibonacci fraction is a rational numberPlanetmathPlanetmathPlanetmath of the form FnFm where Fi is the ith number of the Fibonacci sequenceMathworldPlanetmath and n and m are integers in the relationMathworldPlanetmath n<m. In the Fibonacci fractional series, each m=n+2:

12,13,25,38,513,821,1334,2155,3489,

The most important application of Fibonacci fractions is in botany: plants arrange the leaves on their stems (phyllotaxy) in many different ways, but “only those conforming to a Fibonacci fraction allow for efficient packing of leaf primordia on the meristem surface.” There is also an application in optics.

References

  • 1 P. A. David “Leaf Position in Ailanthus Altissima in Relation to the Fibonacci Series” American Journal of Botany 26 2 (1939): 67
  • 2 R. W Pearcy & W Yang “The functionalPlanetmathPlanetmathPlanetmath morphology of light capture and carbon gain in the Redwood forest understorey plant Adenocaulon bicolor Hook” Functional Ecology 12 4 (1998): 551
  • 3 H. C. Rosu, J. P. Trevino, H. Cabrera & J. S. Murguia, “Self-image effects for diffraction and dispersion” Electromagnetic Phenomena 6 2 (2006): 204 - 211
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更新时间:2025/5/4 3:02:15