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The non-orientable genus, demigenus, or Euler genus of a connected, non-orientable closed surface is a positive integer representing the number of cross-caps attached to a sphere. Alternatively, it can be defined for a closed surface in terms of the Euler characteristic χ, via the relationship χ = 2 − k , where k is the non-orientable genus.
Notes Works cited References External links 0-9 S.S. Kresge Lunch Counter and Soda Fountain, about 1920 86 Main article: 86 1. Soda-counter term meaning an item was no longer available 2. "Eighty-six" means to discard, eliminate, or deny service A abe's cabe 1. Five dollar bill 2. See fin, a fiver, half a sawbuck absent treatment Engaging in dance with a cautious partner ab-so-lute-ly ...
A tabulation of the numbers in a triangular array is called the Euler triangle or Euler's triangle. It shares some common characteristics with Pascal's triangle . Values of A ( n , k ) {\textstyle A(n,k)} (sequence A008292 in the OEIS ) for 0 ≤ n ≤ 9 {\textstyle 0\leq n\leq 9} are:
Euler Mathematical Toolbox (or EuMathT; formerly Euler) is a free and open-source numerical software package. It contains a matrix language, a graphical notebook style interface, and a plot window. Euler is designed for higher level math such as calculus, optimization, and statistics.
The term "magic cookie" in turn derives from "fortune cookie", a cookie with an embedded message. Cursor (user interface) - Cursor is Latin for 'runner.' A cursor is the name given to the transparent slide engraved with a hairline that is used for marking a point on a slide rule. The term was then transferred to computers through analogy.
The Dictionary of American Slang is an English slang dictionary. The first edition was edited by Stuart Flexner and Harold Wentworth and published in 1960 by Thomas Y. Crowell Company . [ 1 ] After Wentworth's death in 1965, [ 2 ] Flexner wrote a supplemented edition which was published in 1967. [ 3 ]
1738 Euler writes on curves of genus 1 considered by Fermat and Frenicle; 1750 Euler writes on elliptic integrals; 23 December 1751 – 27 January 1752: Birth of the theory of elliptic functions, according to later remarks of Jacobi, as Euler writes on Fagnano's work. [5] 1775 John Landen publishes Landen's transformation, [6] an isogeny formula.
Map of Königsberg in Euler's time showing the actual layout of the seven bridges, highlighting the river Pregel and the bridges. The Seven Bridges of Königsberg is a historically notable problem in mathematics. Its negative resolution by Leonhard Euler, in 1736, [1] laid the foundations of graph theory and prefigured the idea of topology. [2]