Leonhard+'Oiler'+Euler

Leonhard Euler was born on April 15 , 1707 in Basel ,  Switzerland . Leonhard was so intelligent that his father hired a private mathematic tutor for him when he was just seven years old . Nine  years later at the age of 16 ,  he started attending the University of Basel where he studied geometry and participated in medical lectures with other university students (NNDB tracking the entire world ; Leonhard Euler, 2011) .  After serving in the Russian Navy as a lieutenant for three years , he went to St . <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">Petersburg to become an associate of the Academy of Sciences ( NNDB tracking the entire world ; Leonhard Euler, 2011 ) <span style="font-family: 'Arial','sans-serif'; font-size: 16pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">In 1740 <span style="font-family: 'Arial','sans-serif'; font-size: 16pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> he decided to spend the next 24 years at the Berlin Academy where he was invited to attend by Frederick the Great ( Bellevue College Leonhard Euler ) <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">Leonhard Euler is famous for creating the //i// used in mathematics of which we use to describe imaginary numbers <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> An imaginary number is sometimes used to describe a negative integer <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">( <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">-1 <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">) <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> that is derived from an odd square root problem <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> Euler contributed the // π //<span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">in 1748 <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">which is used to calculate the circumference of a circle <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> also known as //3// //<span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. ////<span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">14 ////<span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. // <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">Leonhard also introduced the //e// symbol which is now used to describe the infinity of a number <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> and is also used when dealing with natural logarithms <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">He also introduced the most popular symbol which is frequently used in math classes <span style="font-family: 'Arial','sans-serif'; font-size: 16pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">and college fraternity or sorority names <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">, <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">which is the 18th letter of the Greek alphabet known as //Sigma// <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;">Mr <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">. <span style="font-family: 'Arial','sans-serif'; font-size: 12pt; line-height: 130%;"> Euler impacted mathematics by giving us easier ways to calculate functions by hand or by electronic calculators <span style="font-family: 'Arial','sans-serif'; font-size: 14pt; line-height: 130%;">.
 * Leonhard ‘Oiler’ Euler[[image:euler.jpg width="298" height="316" align="right"]] **