Euler - meaning and definition. What is Euler
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What (who) is Euler - definition

SWISS MATHEMATICIAN
EuleR; LeonhardEuler; Leonard Euler; Leonhard Euler/EB1911 biography; L. Euler; Leonhard euler; Euler; Leonhard Paul Euler; Katharina Gsell; Katharina gsell; Lenhard Euler; Leonhardo Eulero; Eulero; L. Eulero; Salome Abigail Gsell; Leonhard P. Euler
  • 10 Franc]] banknote
  • A geometric interpretation of [[Euler's formula]]
  • 10 Franc]] banknote
  • 1957 [[Soviet Union]] stamp commemorating the 250th birthday of Euler. The text says: 250 years from the birth of the great mathematician, academician Leonhard Euler.
  • An Euler diagram
  • Alexander Nevsky Monastery]]
  • Pregel]] and the bridges.

EULER         
SWISS MATHEMATICIAN (1707–1783)
EuleR; LeonhardEuler; Leonard Euler; Leonhard Euler/EB1911 biography; L. Euler; Leonhard euler; Euler; Leonhard Paul Euler; Katharina Gsell; Katharina gsell; Lenhard Euler; Leonhardo Eulero; Eulero; L. Eulero; Salome Abigail Gsell; Leonhard P. Euler
[Named after the Swiss mathematician Leonhard Euler (1707-1783)] A revision of ALGOL by Niklaus Wirth. A small predecessor of Pascal. ["EULER: A Generalisation of ALGOL and Its Formal Definition", N. Wirth, CACM 9(1) (Jan 1966) and 9(2) (Feb 1966)].
Euler jump         
FIGURE SKATING JUMP, USED AS TRANSITION IN A JUMP SEQUENCE
The Euler is an edge jump in figure skating. The Euler jump was known as the half loop jump in International Skating Union (ISU) regulations prior to the 2018/19 season, when the name was changed.
Swiss 1.2-metre Leonhard Euler Telescope         
  • Timelapse video of Euler and the NTT observing the night sky
REFLECTING TELESCOPE IN CHILE
Leonard Euler Telescope; Swiss Euler Telescope; 1.2m Euler; Euler 1.2m Telescope; CORALIE spectrograph; CORALIE; Euler Telescope; Leonhard Euler telescope; EulerCam; EULER; Leonhard Euler Telescope
Leonhard Euler Telescope, or the Swiss EULER Telescope, is a national, fully automatic reflecting telescope, built and operated by the Geneva Observatory. It is located at an altitude of at ESO's La Silla Observatory site in the Chilean Norte Chico region, about 460 kilometers north of Santiago de Chile.

Wikipedia

Leonhard Euler

Leonhard Euler ( OY-lər, German: [ˈɔʏlɐ] (listen); 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who founded the studies of graph theory and topology and made pioneering and influential discoveries in many other branches of mathematics such as analytic number theory, complex analysis, and infinitesimal calculus. He introduced much of modern mathematical terminology and notation, including the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy and music theory.

Euler is held to be one of the greatest mathematicians in history and the greatest of the 18th century. A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is the master of us all." Carl Friedrich Gauss remarked: "The study of Euler's works will remain the best school for the different fields of mathematics, and nothing else can replace it." Euler is also widely considered to be the most prolific; his 866 publications as well as his correspondences are collected in the Opera Omnia Leonhard Euler which, when completed, will consist of 81 quarto volumes. He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia.

Euler is credited for popularizing the Greek letter π {\displaystyle \pi } (lowercase pi) to denote the ratio of a circle's circumference to its diameter, as well as first using the notation f ( x ) {\displaystyle f(x)} for the value of a function, the letter i {\displaystyle i} to express the imaginary unit 1 {\displaystyle {\sqrt {-1}}} , the Greek letter Σ {\displaystyle \Sigma } (capital sigma) to express summations, the Greek letter Δ {\displaystyle \Delta } (uppercase delta) for finite differences, and lowercase letters to represent the sides of a triangle while representing the angles as capital letters. He gave the current definition of the constant e {\displaystyle e} , the base of the natural logarithm, now known as Euler's number.

Euler was also the first practitioner of graph theory (partly as a solution for the problem of the Seven Bridges of Königsberg). He became famous for, among many other accomplishments, solving the Basel problem, after proving that the sum of the infinite series of squared integer reciprocals equaled exactly π2/6, and for discovering that the sum of the numbers of vertices and faces minus edges of a polyhedron equals 2, a number now commonly known as the Euler characteristic. In the field of physics, Euler reformulated Newton's laws of physics into new laws in his two-volume work Mechanica to better explain the motion of rigid bodies. He also made substantial contributions to the study of elastic deformations of solid objects.

Examples of use of Euler
1. Combined Reports Michel Euler / AP Kuznetsova reacting after losing a point during Saturday‘s French Open final.
2. Discovered by the 18th century Swiss mathematician Leonhard Euler, it links the five most important numbers in mathematics.
3. By Gennady Fyodorov Reuters Michel Euler / AP Myskina sitting next to French captain Georges Goven in Paris on Thursday.
4. The loan is supported by Euler Hermes, the German export credit agency, statement from the bank said.
5. Also, Harel sold a third of its holdings in the Israeli Credit Insurance Company to the French insurer Euler Hermes.