The Möbius strip is a surface with only one side and only one boundary. It was discovered independently by the German mathematicians August Ferdinand Möbius and Johann Benedict Listing in 1858. It has several curious properties. A line drawn starting from the seam down the middle will meet back at the seam but at the other side.
Happy Birthday to Lazare Nicolas Marguerite, comte Carnot (1753-1823), a French mathematician, engineer, military officer and politician known as "The Organizer of Victory" in the French Revolutionary Wars. Carnot's contributions in projective geometry helped to set a new foundation for mathematics. Here is an image of a semi-postal (charity) stamp featuring a portrait of Lazare Carnot, designed and engraved by Henry Cheffer (1880-1957), and issued by France on July 10, 1950, Scott No. B251, Y&T No. 869, plus an image of a Lithograph by Ducarme portrait of Lazare Nicolas Marguerite, comte Carnot in uniform. Bonus: Cannons.
The abacus is a calculating tool that was in use centuries before the adoption of the written modern numeral system and is still in Asia, Africa, and elsewhere.
Juraj ("Jur") Hronec (1881-1959) was a Slovakian mathematician and educator whose research was focused primarily on differential equations used in science and technology. Here is an image of a stamp featuring a portrait of Hronec, designed by Jozef Balį˛ (1923-2006), combined engraved by Josef Hercķk (1922-1999) and photogravure, and issued by Czechoslovakia on March 10, 1981 to commemorate the mathematician's birth centenary, Scott No. 2349, plus an image of a photograph of Juraj Hronec.
Johann Carl Friedrich Gauss (1777-1855) was a German mathematician who contributed significantly to many fields, including number theory, algebra, statistics, analysis, differential geometry, geodesy, geophysics, mechanics, electrostatics, astronomy, matrix theory, and optics. In 1831 Gauss published his treatise on complex numbers as points in the plane, largely establishing modern notation and terminology. Here is an image of a stamp depicting an illustration of the plane of complex numbers, designed by German artist Bruno K. Wiese (1922-2011), printed by photogravure, and issued by West Germany on April 14, 1977 to commemorate the bicentenary of Gauss's birth, Scott No. 1246, Michel No. 928.
India National Mathematics Day December 22, 2012 The stamp depicting Srinivasa Ramanujan (1887 - 1920) who published a formula for Pi that converges remarkably faster than many other approaches. The Government Of India declares Ramanujan's birthday as the National Mathematics Day every year and to celebrate 2012 as the National Mathematical Year.
Norway Niels Henrik Abel June 5, 2002 Niels Henrik Abel (1802 - 1829) was a Norwegian mathematician who made pioneering contributions in a variety of fields. His most famous single result is the first complete proof demonstrating the impossibility of solving the general quintic equation in radicals. He was also an innovator in the field of elliptic functions, and discovered Abelian functions. The Abel Prize was established by the Norwegian government in 2002 on the occasion of the 200th anniversary of Niels Henrik Abel's birth. The Abel Prize recognizes contributions to the field of mathematics that are of extraordinary depth and influence.
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Posted 05/10/2015 3:58 pm
