October 31

Are You Sure ...

• ... that physicist and electrical engineer Galileo Ferraris was a pioneer of AC power systems, and inventor of the induction motor?

• ... that mathematician Karl Weierstrass formalized the definition of the continuity of a function, proved the intermediate value theorem and the Bolzano–Weierstrass theorem, and used the latter to study the properties of continuous functions on closed bounded intervals?

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Screenshot: Are You Sure (October 30, 2020)

On This Day in History and Fiction

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  1815: Mathematician and academic Karl Weierstrass born. He will be cited as the "father of modern analysis".

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  1816: Art critic and alleged math criminal The Eel escapes from Nacreum, spending less than a day in the famed transdimensional prison.

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  1847: Physicist and electrical engineer Galileo Ferraris born. He will be a pioneer of AC power systems, and inventor of the induction motor.

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  1926: Magician and stuntman Harry Houdini dies. Houdini's grand illusions and daring, spectacular escape acts made him one of the most famous magicians of all time.

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  2009: Karl "Werewolf" Jones hosts "the greatest Halloween party ever."