Template:Selected anniversaries/March 11

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  1811: Mathematician and astronomer Urbain Le Verrier born. He will predict the existence and position of Neptune using only mathematics, an event which will be widely regarded as one of the most remarkable moments of 19th century science.

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  1821: Poet, painter, and printmaker William Blake publishes his award-winning illustrations of demons and angels. A generation later, mathematicians will discover hidden clues to imminent crimes against mathematical constants.

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  1822: Mathematician, economist, and academic Joseph Louis François Bertrand born. He will work in the fields of number theory, differential geometry, probability theory, economics and thermodynamics.

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  1823: Publication of Niles Cartouchian and Anton Rhodomunde Confront Gnotilus causes widespread debate about the role of private citizens in fighting crimes against mathematical constants.

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  1971: Inventor Philo Farnsworth dies. He made many crucial contributions to the early development of all-electronic television.

• Rudolph Hell.gif

  2002: Inventor and engineer Rudolf Hell dies. He invented the Hellschreiber teleprinter system.