Since ancient times, there have been countless masters in history books, who have dabbled in a wide range, perhaps living in seclusion in unknown places, or perhaps active in the crowd.
Today's protagonist, Yu Jianchun, is a somewhat special folk expert. When he was studying, his math scores were not outstanding. He made great breakthroughs in the field of mathematics and even stood on the platform of Zhejiang University.
Ordinary express packer
Yu Jianchun, aged 37, is from Xinxian County, Henan Province. Born and raised in Dabie Mountain, he is the second son of his family. Although he was interested in mathematics since he was a child.
However, contrary to expectations, his grades did not become excellent because of his strong interest. Finally, he entered the animal husbandry major of an ordinary university.
However, Yu Jianchun didn't give up his interest because of his achievements and major. During his study in Zhengzhou Animal Husbandry College, he often obtained materials related to mathematics through the library.
A book "Mathematical Conjecture" in the library is enough to arouse his interest, and his love for mathematics urges Yu Jianchun to often use his spare time to calculate number theory. And this habit continued until he started working.
After graduation, Yu Jianchun also changed jobs several times, traveling to Wuhan, Kaifeng and other places many times, and finally stayed in Hangzhou, Zhejiang Province, and worked as an ordinary express packer in a logistics company in Hangzhou.
The salary is not high, and there is no room and board for work. He can only rent a small room with seven other people.
In so many years of twists and turns, Yu Jianchun suffered many blows and setbacks from reality, but he never put down his number theory calculus.
When I am free, I always take out a few sheets of paper and gradually pile up a stack of manuscript paper around me. In addition, whenever he goes to a new city, the library in that city will always become his new home.
Countless times sinking into the sea and the last time.
Under the pressure of real life, Yu Jianchun, who is busy with work, can only use the limited time every night to indulge in his favorite number theory.
He loves mathematics, not only does his own calculations, but also contributes to some famous universities in his workplace and other parts of China, trying to verify and share his conclusions.
However, in nearly 65,438+00 years, Yu Jianchun never received any reply to his contribution, and his numerous performances eventually turned into a pile of waste paper.
However, his love made him not negative because of ten years of "no response", on the contrary, he became more positive.
After arriving in Hangzhou, Yu Jianchun worked during the day and developed his hobbies at night as before.
At about 20 16, Yu Jianchun put a letter in the mailbox of Professor Cai Tianxin from the School of Mathematics of Zhejiang University. What he wrote in this letter is naturally the deduction process he wrote in countless nights in the past.
Just when he thought that the result of this submission would sink into the sea like countless previous submissions, an email from Professor Cai Tianxin invited him to attend a discussion class in the Department of Mathematics of Zhejiang University, which pushed him to a bright future.
A new criterion for judging Carmichael number
Yu Jianchun was both nervous and excited when he received the invitation. Probably because he never thought that he would really have the opportunity to share his views with professors and doctors in the field of mathematics. Until he really stood on the platform of Zhejiang University, he seemed a little embarrassed and nervous.
But Yu Jianchun soon removed the tension. He began to write down his findings on the blackboard.
Under the long-term repeated deduction, he didn't read the materials and notes, but wrote his five findings on the blackboard by his own memory. His seriousness won unanimous applause from everyone in the room.
After the deduction, the experts and scholars attending the seminar immediately began to demonstrate, and the results were also very amazing.
Although under their verification, it was found that two of Yu Jianchun's five discoveries had already been discovered and published by others in the industry, his discovery about "Kalman number" was very special.
According to Professor Cai Tianxin, he verified the formulas put forward by Jian Chun, which not only proved their correctness, but also thought that the new criterion of Carmichael numbers derived by Yu Jianchun enabled us to find more Carmichael numbers with higher efficiency in a certain range.
This is not only Yu Jianchun's personal new discovery in the field of mathematics, but also a new breakthrough in the field of mathematics.
Although Yu Jianchun's derivation process is too short, and he doesn't have much time and enough professional background to publish it as a complete academic paper.
However, after careful consideration, Professor Cai Tianxin decided to include Yu Jianchun's new discovery in his latest English book, so as to share it with more mathematics experts and scholars.
Good Will Hunting.
1997 A film called Good Will Hunting was released, which tells the story of a young cleaner, Will. He is unruly and is often punished for picking fights.
But he is also a talented person in mathematics. It was not until the emergence of Professor Thorne, a psychological consultant, that all this turned around. Under the running-in of each other, Will finally found his love and self.
In the eyes of foreign media, Yu Jianchun seems to be a realistic version of goodwill hunting. CNN once associated Yu Jianchun with this film. "A migrant worker without a college degree solved a worldwide mathematical problem with his own skills, which is China's version of goodwill hunting".
CCTV also filmed a news short film about Yu Jianchun's new Kalman number standard. In this way, this unknown migrant worker who loves mathematics appeared in front of the people of the whole country, and in an instant he became synonymous with hard work, progress and genius.
While receiving favorable comments, many people also expressed their doubts. Two of the so-called five discoveries have been demonstrated and published. Is there any suspicion of plagiarism?
As a professor in a famous university, is it a show to invite an ordinary worker to give a lecture?
Regarding the suspicion of putting on a show, Professor Cai Tianxin said that he just wanted to give the young man some encouragement and hoped that he could continue on this road. He is very talented. He can go further.
For those who questioned the authenticity of Yu Jianchun's own research, Yu Jianchun simply responded that he neither knew the cutting-edge progress nor would he do such a thing.
For a person who really loves mathematics, "plagiarism" is the biggest insult to what he loves, and being praised now is the biggest encouragement to his efforts for so many years.