Today's Google Doodle honors a Swiss mathematician named Leonhard Euler. "Leonhard Euler was a pioneering Swiss mathematician and physicist. He made important discoveries in fields as diverse as infinitesimal calculus and graph theory." Wikipedia
He was considered one of the greatest mathematicians that ever lived and the most prolific, introducing much of modern mathematical terminology and notation. He was born April 15th 1707 in Basel, Switzerland and died 9/18/1783 in Russia. A large number of functions, equations and formulas are named in his honor. Lists of things named after Leonhard Euler from wikipedia.
Euler worked in many areas of mathematics including calculus, trigonometry, algebra, geometry, number theory, physics, and lunar theory. He is unique in that he has 2 numbers named after him, Euler's number in calculus, e, 2.71828, and Euler's Constant γ,(gamma) 0.57721.
According to Science World, he had a phenomenal memory and once did a calculation in his head to settle an argument between students. He lost the sight in his eyes possibly due to cataracts, but continued to publish by dictation. He published over 800 papers in his lifetime. He truly was a mathematical genius. Francois Argo said of him, "He Calculated just as men breathe, as eagles sustain themselves in the air" (Beckmann 1971, p. 143; Boyer 1968, p. 482).
Photo credits : Google Doodles

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