Leonhard Euler was born on this day in 1707

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EULER (OY-ler)

Swiss mathematician noted for his work in analysis and algebra
Common clues:
Swiss mathematician Leonhard; Calculus pioneer; Famed Swiss mathematician; Mathematician known as “Analysis Incarnate”; Noted blind mathematician
Crossword puzzle frequency: once a year
Frequency in English language: 62273 / 86800
Euler's Formula: The most beautiful mathematical equation of all time

Mathematicians have tried in vain to this day to discover some order in the sequence of prime numbers, and we have reason to believe that it is a mystery into which the human mind will never penetrate. ~ Leonhard Euler

Leonhard Paul Euler (April 15, 1707 – September 18 [O.S. September 7] 1783) was a pioneering Swiss mathematician and physicist, who spent most of his life in Russia and Germany.

A 1753 portrait by Emanuel Handmann. This portrayal suggests problems of the right eyelid, and possible strabismus. The left eye appears healthy; it was later affected by a cataract.

Euler made important discoveries in fields as diverse as calculus and graph theory. He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysis, such as the notion of a mathematical function. He is also renowned for his work in mechanics, optics, and astronomy.

Euler is considered to be the preeminent mathematician of the 18th century and one of the greatest of all time. He is also one of the most prolific; his collected works fill 60–80 quarto volumes. A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is the master [i.e., teacher] of us all."

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Leonhard Euler"