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What are the plant mathematicians in nature?
Petals are symmetrically arranged at the edge of receptacle, and the whole flower almost perfectly presents a radiation symmetry shape. Therefore, the famous mathematician Descartes listed the equation x3+y3-3axy = o according to the characteristics of a bunch of petals and leaves, which is the famous "Descartes leaf line" in modern mathematics. Not only that, scientists also found that the number of petals, sepals, fruits and other characteristics of plants is very consistent with a strange sequence. 1,2, 3, 5, 8, 3, 21,34, 55, 89 ... where, starting from 3, each number is the sum of the first two items. This is Fibonacci sequence.

In Xi, China, there is a common grass called plantain. The included angle between its blades is exactly 137.5, which accords with the numerical value called golden angle in mathematics. The banana leaves arranged at this angle can ensure that each leaf can get the maximum sunlight, thus effectively improving the efficiency of plant photosynthesis. Therefore, the architect designed a novel spiral high-rise building with reference to the mathematical model of banana leaf arrangement, and the best lighting effect made every room of the high-rise building bright.