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The story of mathematicians: Euler, a blind mathematician
The following is a story about mathematicians: an article by Euler, a blind mathematician. I hope you like it!

Euler's amazing achievements are not accidental. He can work in any harsh environment, often holding his children on his knees to finish his papers, regardless of the noise of older children. At the age of 28, Euler was unfortunately blind in one eye. Thirty years later, his other eye was also blind. He never stopped studying mathematics after he became blind. He continued to work with amazing perseverance and perseverance. During the seventeen years from blindness to his death, he also wrote several books and published about 400 papers orally. It is very difficult to publish the complete works of Euler because there are many works. The Swiss Society of Natural Sciences began to sort out and publish them in 1909, and it has not been completed until now. The plan is 72 volumes.

Among his 886 works, 530 are books and papers published before his death, many of which are textbooks. His works are fluent, simple, easy to understand and fascinating after reading, which greatly amazed readers. It is particularly worth mentioning that the textbook of plane triangle written by him uses symbols such as sinx, cosx, … and so on, which are still in use today.

Euler entered university of basel in the autumn of 1720. Because of his extraordinary diligence and intelligence, johann bernoulli tasted his sweetness and gave him special guidance. Euler worked hard and became close friends with John's two sons, Nicholas Bo and daniel bernoulli.

Euler wrote a paper on masts at the age of 19, and won an award from the Paris Academy of Sciences, from which he began his creative career. I won many awards in succession. 1725, the Daniel brothers went to Russia and recommended Euler to czar Cadling I, so Euler arrived in Petersburg on 17 in May, and Daniel returned to Basel on 1733. Euler succeeded him as a professor of mathematics at the Academy of Sciences in Petersburg at the age of 26.

1735, Euler solved a difficult problem in astronomy (calculating the orbit of a comet).

It took several mathematicians months to solve this problem, but Euler invented it in three days. But overwork made him suffer from eye diseases, and unfortunately he was blind in his right eye. At this time, he was only 28 years old.