20 16 there was a man, who was a courier, but with his innate mathematical talent, he solved the problem that puzzled the mathematics field for a hundred years, which not only won the favor of Cai Tianxin, a professor at Zhejiang University, but also made him grow from an ordinary courier to a mathematician who attracted worldwide attention, completely changing his fate. This man is Yu Jianchun.
Yu Jianchun, 1983, a native of Xinyang, Henan Province, did not achieve satisfactory results as a student. Except mathematics, all other subjects have just passed the passing line, which is what we now call "partial subjects" To this end, after graduating from high school, the college entrance examination results are not ideal. Yu Jianchun went to Zhengzhou Animal Husbandry College to study animal husbandry.
After graduating from junior college, Yu Jianchun, who was full of longing for her future life, went to the north and Guangzhou and other places, but she ran into a wall everywhere because her major was "not right" with many mainstream majors, and she could not find a job. In this case, in order to make a living, Yu Jianchun returned to his hometown in Henan and worked as a courier in a local courier company.
What is different is that although Yu Jianchun is a courier, he still hasn't given up his dream of mathematics. Every time he is free, he will delve into mathematics in the dormitory and solve those math problems. Maybe his major in college is not mathematics, and Yu Jianchun's way of solving problems is very novel. Yu Jianchun solved many mathematical problems with his unique way of solving problems, including "Kalman number".
In order to verify whether his calculation is correct, every time Yu Jianchun sends a courier to a place, he will contribute to the local university, but when he arrives, he will sink into the sea without any reply, but he will not give up and still insist on his behavior, expecting their answers.
Until one day in June, 20 16, teacher Cai Tianxin of Zhejiang University received Yu Jianchun's manuscript, and immediately got in touch with him, inviting Yu Jianchun to live calculus in Zhejiang University. On the same day, Cai Tianxin, a professor at the School of Mathematics of Zhejiang University and an associate professor of number theory, and several doctoral students watched on the spot. Everyone is expecting how this young man, whom Professor Cai Tianxin called a "mathematical genius", can solve carmichael's numbers.
Faced with such a strong lineup, Yu Jianchun was once nervous, but soon he was immersed in the process of mathematical calculus. And an animal husbandry professional courier brother cracked the "Carmichael number" and became the target of domestic and foreign media. Cai Tianxin, a professor at Zhejiang University, told reporters that his calculations are very imaginative, and some calculation processes even reached the "master level".
Yu Jianchun's calculation of "Kalman number" not only caused a sensation at home, but also got a high evaluation abroad. William Banks, a professor at the University of Missouri in the United States, said: "If his inference (referring to Yu Jianchun) is proved to be correct, it will be an exciting discovery in Michael's field!"
With the media reports, Yu Jianchun changed from a courier to a local "red man", and many companies also extended olive branches to him. Finally, Yu Jianchun accepted the job invitation of Silk Road Holding Group in Huzhou City, Zhejiang Province, and became a data analyst under the recommendation of Cai Tianxin, a professor at Zhejiang University. Chairman Ling Lanfang told reporters that this position will provide him with better development opportunities and give full play to his talents in mathematics.