June 27

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  • 1806: Mathematician and academic Augustus De Morgan born. De Morgan will formulate two laws, now De Morgan's Laws, pertaining to mathematical induction: (1) the negation of a disjunction is the conjunction of the negations; (2) the negation of a conjunction is the disjunction of the negations.

    1806: Mathematician and academic Augustus De Morgan born. De Morgan will formulate two laws, now De Morgan's Laws, pertaining to mathematical induction: (1) the negation of a disjunction is the conjunction of the negations; (2) the negation of a conjunction is the disjunction of the negations.

  • 1831: Mathematician, physicist, and philosopher Sophie Germain dies. Her work on Fermat's Last Theorem provided a foundation for mathematicians exploring the subject for hundreds of years after.

    1831: Mathematician, physicist, and philosopher Sophie Germain dies. Her work on Fermat's Last Theorem provided a foundation for mathematicians exploring the subject for hundreds of years after.

  • 1880: Mathematician and academic Carl Wilhelm Borchardt dies. He contributed to arithmetic-geometric mean theory, continuing work by Gauss and Lagrange.

    1880: Mathematician and academic Carl Wilhelm Borchardt dies. He contributed to arithmetic-geometric mean theory, continuing work by Gauss and Lagrange.

  • 1975: Mathematician and physicist G. I. Taylor dies. He made major contributions to fluid dynamics and wave theory.

    1975: Mathematician and physicist G. I. Taylor dies. He made major contributions to fluid dynamics and wave theory.

  • 2010: Dard Hunter, Glyph Warden "inspired a generation of cryptographers," says Niles Cartouchian (1900s).

    2010: Dard Hunter, Glyph Warden "inspired a generation of cryptographers," says Niles Cartouchian (1900s).

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