1707 was born in Basel, Switzerland on April 5, and 1783 died in St. Petersburg, Russia on September 8. Euler was born in a priest's family and was influenced by his father since childhood. /kloc entered university of basel at the age of 0/3, graduated from university at the age of 0/5, and obtained a master's degree at the age of 0/6. Euler is one of the most outstanding figures in the field of mathematics in the18th century. He not only made contributions in the field of mathematics, but also pushed the whole mathematics into the field of physics. He is the most prolific mathematician in the history of mathematics, writing more than 800 pages of papers every year on average. He also wrote a large number of textbooks on mechanics, analysis, geometry and variational methods. Introduction to Differential Analysis, Principles of Differential Calculus and Principles of Integral Calculus have all become classic works in the field of mathematics.