This Swiss postage stamp was issued on the 150th anniversary of the Swiss engineers and architects association SIA and contains an interesting mathematical construction.
The Puzzling World of Fibonacci Numbers
Switzerland 1987
Leonardo da Pisa, known as Fibonacci (c. 1170 – c. 1250) Dominica 1999
What is the link between the golden ratio and the Fibonacci sequence ? Well if you divide on element of the sequence by its predecessor you get an approximation of the golden ratio ! And the bigger is the element you choose, the more precise is the approximation ! It's magic !
The accident is sometimes perforated flat leaves: a corner of the sheet is bent, and the stitching is done on this fold. This is what catalogs sometimes use the obscure term "variety of quilting"
Athletes running (another athlete is not shown in this stamp ) with an amazing (very unlikely) synchronization, the right arm and left leg in a leading position. This is probably showing a 1 stadion or diaulos event. In Dolichos the athletes are shown to be much slower as the distance is much larger and it is impossible to keep the high speed like in shorter races.
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Posted 02/10/2012 2:40 pm
