Author
photo credits: Wikimedia Commons
Leonhard Euler
Swiss mathematician
wd:Q7604
1707

1783
country of citizenship: Old Swiss Confederacy, Russian Empire, Kingdom of Prussia
languages spoken, written or signed: Latin, German, French, Russian
educated at: University of Basel
occupation: mathematician, physicist, university teacher, writer, music theorist, astronomer
award received: AAAS Fellow, Fellow of the Royal Society
student of: Johann Bernoulli
influenced by: Pierre de Fermat, Christiaan Huygens, Pierre Louis Moreau de Maupertuis
Leonhard Euler ( OYlər; 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 PierreSimon 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 more than 850 publications are collected in 92 quarto volumes, (including his Opera Omnia) more than anyone else in the field. 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 (lowercase pi) to denote Archimedes' constant (the ratio of a circle's circumference to its diameter), as well as first employing the term f(x) to describe a function's yaxis, the letter i to express the imaginary unit √−1, and the Greek letter Σ (capital sigma) to express summations. He gave the current definition of the constant e, the base of the natural logarithm, still 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 – among others – for 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 edges and faces minus vertices 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 twovolume work Mechanica to explain the motion of rigid bodies more easily. He also made substantial contributions to the study of elastic deformations of solid objects.
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Series
0Works
6
Introduction to Analysis of the Infinite
inv:6b7fa3e80d0ac70318c2253b4571b08bauthor: Leonhard Euler

Theoria motus corporum solidorum seu rigidorum
inv:369ff22befe7fc780c37c1dfc5925f41author: Leonhard Euler
Articles
4Stories About Maxima and Minima. By V. M. Tikhomirov ( 1992 )
wetenschappelijk artikel
author: Leonhard Euler Abe Shenitzer
Solution to the problem of reciprocal trajectories ( 1729 )
scholarly article by Euler published 1729
author: Leonhard Euler
Construction of isochronous curves in a resistant medium ( 1726 )
scholarly article by Euler published 1726
author: Leonhard Euler
Physical dissertation on sound ( 1727 )
scholarly article by Euler published 1727
author: Leonhard Euler