Golden ratio, a specific mathematical ratio (sometimes called golden mean)
Golden ratio, an irrational mathematical constant with special properties in arts and mathematics
The first known approximation of the (inverse) golden ratio by a decimal fraction, stated as "about 0.6180340", was written in 1597 by Michael Maestlin of the University of Tübingen in a letter to his former student Johannes Kepler.
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Adolf Zeising, whose main interests were mathematics and philosophy, found the golden ratio expressed in the arrangement of branches along the stems of plants and of veins in leaves.
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The nineteenth century British art and social critic John Ruskin believed that the particular curve of the leaf-ribs of Alisma represented a model of 'divine proportion' and helped shape his theory of Gothic architecture.
The first version of the LNX-BBC that was independent from Linuxcare was 1.618 (a number suggested by team member Seth Schoen, an approximation of the golden ratio, or phi (φ), and a tribute to Donald Knuth who uses successively more precise approximations of π for versioning his TeX typesetting system).
As a researcher he published diverse works of international academic acknowledgement regarding themes such as the golden ratio, Villard de Honnecourt (the 13th-century artist from Picardy), and the history of architecture.
Mark Barr was an American mathematician who, according to Theodore Andrea Cook, in about 1909, gave the golden ratio the name of phi (ϕ), the first Greek letter in the name of Phidias, the Greek sculptor who lived around 450 BC.
The video includes images of the actual rose of Jericho (seen right) and a tulip, as well as the golden ratio, a motif used in the video for BT's earlier song "1.618".