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If "Number rules the universe" as Pythagoras asserted, Number is merely our delegate to the throne, for we rule Number.
In H. Eves Mathematical Circles Revisited, Boston: Prindle, Weber and Schmidt, 1971.
Loci: Convergence
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Mathematical Treasures
Marin Mersenne's Universal Geometry
The title page of Universal Geometry, by Marin Mersenne (1588 - 1648), published in Paris in 1644. A compendium of material on geometry, mechanics and optics, it considers the theories of Euclid, Archimedes, Ramus, Theodosius, and Apollonius and includes a treatise on optics by the contemporary natural philosopher Thomas Hobbes (1588 - 1679).