Fibonacci number
noun[C]
mathematicsspecializeduk/fɪb.əˈnɑː.tʃi ˌnʌm.bər/us/fɪb.əˈnɑː.tʃi ˌnʌm.bɚ/anumberthat ispartof aseriesin which eachnumberis thesum(=totalwhenaddedtogether)of the twonumbersthat come before it in theseries, forexample0, 1, 1, 2, 3, 5, 8 ..:
斐波纳契数列Thefruitof apineappleisarrangedin twointerlockinghelices, eight in onedirection, thirteen in the other, each being a Fibonaccinumber.菠萝的果实上排列着互相连接的螺旋形，8个螺旋朝向一个方向，十三个螺旋朝向另一个方向，每个都符合斐波纳契数列。
Changes intrendsvery oftencorrespondwith Fibonaccinumbers.趋势的变化往往与斐波纳契数列相对应。
- Theprogressionsof Fibonaccinumbersarecommonlyfoundin thegrowthratesandstructuresofnature.
- What wascuriouswas that the Fibonaccinumberscroppedup all over theplacein thebotanicalworld- forinstance, when youcountthenumbersofpetalsonflowers, or thespiralsin which theseedsarrangethemselves in the flower-head.
Numerical relationships
- absolute maximum
- absolute minimum
- arithmetic progression
- cardinality
- decreasing
- differential
- disproportionate
- intersect
- inverse function
- inverse proportion
- linear
- linearly
- monotonic
- percent
- percentage
- prorated
- quantile
- ratio
- recursion
- trinomial