**Leonhard Euler**, born on April 15, 1707, was one of the founders of pure mathematics. His namesake equation is among the most beautiful forms in math. Michael Atiyah, a Fields Medal and Abel Prize winner, calls it the equivalent of Hamlet’s phrase “To be, or not to be” — "very short, very succinct, but at the same time very deep."

Leonhard Euler Swiss 15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, logician and engineer who made important and influential discoveries in many branches of mathematics like infinitesimal calculus and graph theory while also making pioneering contributions to several branches such as topology and analytic number 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 known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory.

**Euler** was one of the most eminent mathematicians of the 18th century, and is held to be one of the greatest in history. He is also widely considered to be the most prolific mathematician of all time. His collected works fill 60 to 80 quarto volumes, more than anybody in the field. He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia.

A statement attributed to Pierre-Simon Laplace expresses **Euler**'s influence on mathematics: "Read Euler, read Euler, he is the master of us all." Wikipedia, Leonard Euler

See Also

**Ether - Euler**
**Letters of Euler on Natural Philosophy**
**Music**
**Music Theory**