![]() ![]() And so the Pythagoreans used to invoke the Tetrad as their most binding oath: `By him that gave to our generation the Tetractys, which contains the fount and root of eternal nature.'" ( Aetius I. So that the number by the unit resides in the number 10, but potentially in the number 4. And if one exceeds the tetrad, one will exceed 10 too. This is the reason: if one starts at the unit (1) and adds the successive number up to 4, one will make up the number 10 (1+2+3+4 = 10). And again, Pythagoras maintains, the power of the number 10 lies in the number 4, the tetrad. All Greeks and all barbarians alike count up to ten, and having reached ten revert again to the unity. Boethius looks very proud, he is ready while the poor Pythagoras still tries to find the solution. ![]() Pythagoras uses an Abacus, while Anicius Manlius Severinus Boethius (480 AD-524 AD) uses Numerals from India. A Symbolic Image: Boethius and Pythagoras in a mathematical Competition. ![]() It seems to us that after the invention of writing the largest discovery was the use by humanity of the so-called decimal notation. ![]()
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