(c. 580-500 BC) Greek mathematician and philosopher who formulated the Pythagorean theorem.
Much of his work concerned numbers, to which he assigned mystical properties. For example, he classified numbers into triangular ones (1,3, 6, 10.), which can be represented as a triangular array, and square ones (1, 4, 9, 16.), which form squares. He also observed that any two adjacent triangular numbers add to a square number (for example, 1 + 3 = 4; 3 + 6 = 9; 6 + 10 = 16.).
Pythagoras was the founder of a politically influential religious brotherhood in Croton, S Italy (suppressed in the 5th century).
Its tenets included the immortality and transmigration of the soul.
Čuveni matematičar i filozof antičke Grčke, koji je formulisao Pitagorinu teoremu.