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There can be no doubt that as a scholar Archytas lived by the great insight that set the pythagoreans apart from other ancient thinkers: that numbers and number relationships were the key to vast knowledge about the universe. Archytas was a rigorous mathematician who solved an infamous problem in Greek mathematics known as the Delian problem, or doubling a cube, that is, creating a new cube twice the volume of the first. Archytas' solution was sophisticated, requiring new geometry using three dimensions - "solid" geometry - and involving the idea of movement. ~ page 121 (The Music of Pythagoras)
www-history.mcs.st-andrews.ac.uk/HistTopics/Doubling_the_...
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