Template:Selected anniversaries/March 18

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  • 1640: Painter, mathematician, astronomer, and architect Philippe de La Hire born. La Hire will be the favorite pupil of Desargues, and develop conic sections and epicycloids based on the teaching of Desargues.

    1640: Painter, mathematician, astronomer, and architect Philippe de La Hire born. La Hire will be the favorite pupil of Desargues, and develop conic sections and epicycloids based on the teaching of Desargues.

  • 1727: Scientist and watchmaker Ferdinand Berthoud born. Berthoud will serve as Horologist-Mechanic by appointment to the King and the Navy, leaving an exceptionally broad body of work, notable for excellent sea chronometers.

    1727: Scientist and watchmaker Ferdinand Berthoud born. Berthoud will serve as Horologist-Mechanic by appointment to the King and the Navy, leaving an exceptionally broad body of work, notable for excellent sea chronometers.

  • 1870: Physicist, geophysicist, and Gnomonic tecto-algorithm expert Emil Wiechert generates a resonance between the layered structure of the Earth and the layered structure of an electron, unexpectedly opening a communications link with AESOP, the alleged ionospheric intelligence.

    1870: Physicist, geophysicist, and Gnomonic tecto-algorithm expert Emil Wiechert generates a resonance between the layered structure of the Earth and the layered structure of an electron, unexpectedly opening a communications link with AESOP, the alleged ionospheric intelligence.

  • 1871: Mathematician and academic Augustus De Morgan dies. De Morgan formulated 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.

    1871: Mathematician and academic Augustus De Morgan dies. De Morgan formulated 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.

  • 1927: Physicist, mathematician, and activist William C. Davidon born. Davidon will develop the first quasi-Newton algorithm, now known as the Davidon–Fletcher–Powell formula.

    1927: Physicist, mathematician, and activist William C. Davidon born. Davidon will develop the first quasi-Newton algorithm, now known as the Davidon–Fletcher–Powell formula.

  • 1927: Journalist, writer, literary editor, and actor George Plimpton born. Plimpton will be famous for "participatory journalism": competing in professional sporting events, playing with the New York Philharmonic Orchestra, performing a circus trapeze act, and then recording the experience from the point of view of an amateur.

    1927: Journalist, writer, literary editor, and actor George Plimpton born. Plimpton will be famous for "participatory journalism": competing in professional sporting events, playing with the New York Philharmonic Orchestra, performing a circus trapeze act, and then recording the experience from the point of view of an amateur.

  • 1963: Mathematician Tan Lei born. Tan Lei will specialize in complex dynamics and functions of complex numbers, making contributions to the study of the Mandelbrot set and Julia set.

    1963: Mathematician Tan Lei born. Tan Lei will specialize in complex dynamics and functions of complex numbers, making contributions to the study of the Mandelbrot set and Julia set.

  • 1964: Mathematician and crime-fighter Gaston Maurice Julia discovers new class of Gnomon algorithm functions which anticipate the later work of Tan Lei in using the Julia set to detect and prevent crimes against mathematical constants.

    1964: Mathematician and crime-fighter Gaston Maurice Julia discovers new class of Gnomon algorithm functions which anticipate the later work of Tan Lei in using the Julia set to detect and prevent crimes against mathematical constants.

  • 1964: Physicist and academic Louis de Broglie uses the wave nature of electrons to detect and prevent crimes against mathematical constants.

    1964: Physicist and academic Louis de Broglie uses the wave nature of electrons to detect and prevent crimes against mathematical constants.

  • 2016: Green Spiral 9 voted Picture of the Day by the citizens of New Minneapolis, Canada.

    2016: Green Spiral 9 voted Picture of the Day by the citizens of New Minneapolis, Canada.

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