Template:Selected anniversaries/July 23

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  • 1754: Joseph-Louis Lagrange publishes his first work, in the form of a letter in Italian. A month later he realized that he had rediscovered Leibniz's formula for the nth derivative of a product.

    1754: Joseph-Louis Lagrange publishes his first work, in the form of a letter in Italian. A month later he realized that he had rediscovered Leibniz's formula for the nth derivative of a product.

  • 1829: William Austin Burt patents the typographer, a precursor to the typewriter.

    1829: William Austin Burt patents the typographer, a precursor to the typewriter.

  • 1885: The well-known illustration Interview with Wallace War-Heels is stolen by math criminals, who demand computational ransom.

    1885: The well-known illustration Interview with Wallace War-Heels is stolen by math criminals, who demand computational ransom.

  • 1934: Mathematician and crime-fighter Hans Hahn publishes new analysis of set theory which soons finds application in detecting and preventing crimes against mathematical constants.

    1934: Mathematician and crime-fighter Hans Hahn publishes new analysis of set theory which soons finds application in detecting and preventing crimes against mathematical constants.

  • 1928: Astronomer and academic Vera Rubin born. She will discover the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

    1928: Astronomer and academic Vera Rubin born. She will discover the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

  • 1962: Mathematician and crime-fighter Alice Beta uses Telstar to communicate with AESOP.

    1962: Mathematician and crime-fighter Alice Beta uses Telstar to communicate with AESOP.

  • 1962: Telstar relays the first publicly transmitted, live trans-Atlantic television program, featuring Walter Cronkite.

    1962: Telstar relays the first publicly transmitted, live trans-Atlantic television program, featuring Walter Cronkite.

  • 2017: AESOP re-broadcasts Walter Cronkite's 1962 trans-Atlantic television program.

    2017: AESOP re-broadcasts Walter Cronkite's 1962 trans-Atlantic television program.

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