Leonhard Euler
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Leonhard Euler (pronounced Oiler) was a famous Swiss mathematician. He made numerous contributions to many fields of mathematics and science. Euler is considered to be one of the greatest mathematicians of all time.
Biography
Euler was born on April 15, 1707 in Basel, Switzerland. Euler's parents were Paul Euler, a pastor of the Reformed Church, and Marguerite Brucker, a pastor's daughter. He had two young sisters, named Anna Maria and Maria Magdalena. At the age of thirteen he enrolled at the University of Basel.
On January 7, 1734, he married Katharina Gsell. The young couple had thirteen children, only five of whom survived childhood.
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On September 18, 1783, Euler passed away in St. Petersburg, Russia after suffering a brain hemorrhage. He was buried in the Alexander Nevsky Monastery.
Contributions
- In 1735, Euler showed that
where 
is the zeta function. - Euler's polyhedral formula
- Euler's totient theorem
- Euler's identity
- Eulerian graph
where 
is the 
