DetailsParabolic Spiral Jewelry Set _Designed by Lethemakerprince ( http://www.cgtrader.com/free-3d-print-models/jewelry/other/stephanie-and-h1-h0-s-jewelry ) _Comments written by designer :" Stephanie likes to use Math to make her jewelry. These pieces were created using a Python script so that they would repeat a cylinder shape in a spiral. The formula is based on Fermat's spiral" _***Fermat's spiral (also known as a parabolic spiral) follows the equation. It is a type of Archimedean spiral.In disc phyllotaxis, as in the sunflower and daisy, the mesh of spirals occurs in Fibonacci numbers because divergence (angle of succession in a single spiral arrangement) approaches the golden ratio. The shape of the spirals depends on the growth of the elements generated sequentially. In mature-disc phyllotaxis, when all the elements are the same size, the shape of the spirals is that of Fermat spirals—ideally. That is because Fermat's spiral traverses equal annuli in equal turns. The full model proposed by H Vogel in 1979.The angle 137.508° is the golden angle which is approximated by ratios of Fibonacci numbers. Fermat's spiral has also been found to be an efficient layout for the mirrors of concentrated solar power plants. _***Fibonacci numbers, the elements of the sequence of numbers 1, 1, 2, 3, 5, 8, 13, 21, …, each of which, after the second, is the sum of the two previous numbers. These numbers were first noted by the medieval Italian mathematician Leonardo Pisano (“Fibonacci”) in his Liber abaci (1202; “Book of the Abacus”), which also popularized Hindu-Arabic numerals and the decimal number system in Europe. _By definition, the first two numbers in the Fibonacci sequence are 1 and 1, or 0 and 1, depending on the chosen starting point of the sequence, and each subsequent number is the sum of the previous two. _The Fibonacci sequence is named after Fibonacci. His 1202 book Liber Abaci introduced the sequence to Western European mathematics, although the sequence had been described earlier in Indian mathematics. By modern convention, the sequence begins either with F0 = 0 or with F1 = 1. The Liber Abaci began the sequence with F1 = 1, without an initial 0. _Fibonacci numbers are closely related to Lucas numbers in that they are a complementary pair of Lucas sequences. They are intimately connected with the golden ratio; for example, the closest rational approximations to the ratio are 2/1, 3/2, 5/3, 8/5, ... . Applications include computer algorithms such as the Fibonacci search technique and the Fibonacci heap data structure, and graphs called Fibonacci cubes used for interconnecting parallel and distributed systems. They also appear in biological settings, such as branching in trees, phyllotaxis (the arrangement of leaves on a stem), the fruit sprouts of a pineapple, the flowering of an artichoke, an uncurling fern and the arrangement of a pine cone.
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SKU 10001121 Length [mm] 123.19 Width [mm] 123.08 Height [mm] 28.25 Volume [cm³] 83.48 Area [cm²] 456.3