Pythagoras May Have Been A Murderous Math Cult Leader
You may be most familiar with the name Pythagoras from the common theorem dealing with right triangles. However, the ancient mathematician Pythagoras, who lived around 500 B.C., was quite a character himself. One weird quirk is that he was afraid of beans. But, he also led a math cult of Pythagoreans who would discuss mathematical ratios and proportions. According to legend, a member of Pythagoras' cult (or religion, depending on the source) tried proving to Pythagoras that the leg of a triangle could be an irrational number. Pythagoras is rumored to have then killed the man, who was named Hippasus.
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from Vi Hart
Key Facts In This Video
Mathematician Pythagoras had a strong fear of beans. (0:14)
Arabic numbers were brought to the west by Fibonacci around the year 1200. (2:27)