Template:Selected anniversaries/June 27

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  • 1580: Cartographer, geographer, and APTO signatory Abraham Ortelius publishes his monumental Theatrum Gnomonis Terrarum, anticipating the discovery of continental drift and its role in the detection and prevention of crimes against geological constants.

    1580: Cartographer, geographer, and APTO signatory Abraham Ortelius publishes his monumental Theatrum Gnomonis Terrarum, anticipating the discovery of continental drift and its role in the detection and prevention of crimes against geological constants.

  • 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.

  • 1938: Mathematician and philosopher Edmund Husserl publishes new class of Gnomon algorithm functions based on transcendental consciousness as the limit of all possible knowledge.

    1938: Mathematician and philosopher Edmund Husserl publishes new class of Gnomon algorithm functions based on transcendental consciousness as the limit of all possible knowledge.

  • 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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