"Did you give him the kink problem over there?" The two laughed for a while, and Professor Hu asked.

Jun Xin nodded and said: "Yes, in fact, I have solved part of the kink problem, the reason why I handed it over to him is just to give him a little pressure, his foundation is not bad, he is especially sensitive to mathematical problems, if you cultivate it carefully, you can be worthy of a new star in the future mathematical community." ”

"How far have you got?" Professor Hu asked curiously.

"When I was collecting materials and writing a reference book, I had a little inspiration, and I basically had a little research direction. However, in order to complete it, a certain foundation of physics is required. It seems that when I asked him to study a little physics, he majored in mathematics and physics, but I didn't know what he could do. ”

"Oh? Finding kink invariants has always puzzled mathematicians, so why not solve it yourself if you have an idea? Professor Hu asked confusedly.

"Hehe, there's a reason I'm doing this." Junxin explained, "I want to gather some top talents in China to do some meaningful research, but after all, I am still too young. So I'm still looking for some like-minded friends to do this together, Senior Hao Peng is one, Donglai is also one, and I have less contact with other people, and I'm still looking for it for the time being. ”

Domestic affairs, as a lifelong Professor Hu, knows more than Junxin, and he naturally knows the twists and turns behind Junxin's words, so he didn't say anything about what Junxin was going to do, and consciously diverted the topic and said another topic: "You told me some time ago that you want to study physics, although I advised you not to be distracted from studying other courses at this time, and you should focus on one aspect." However, you seem to have your own ideas, so I still helped you find the domestic authority of the Department of Physics to study high-energy particle physics, and Professor Zhou of our Department of Mathematical Physics, Professor Zhou did not directly promise me, but he also promised me to give you a chance to communicate, if you can impress him, you can follow him to study physics. ”

"Thank you for getting old!" Junxin was overjoyed, although his achievements during this period of time were in mathematics, but Junxin did not forget that he was still a physicist by profession.

"Is math bad? What is it that makes you obsessed with physics? After all, when Junxin was still teaching at USTC, Professor Hu had paved the way for him to study in China, but in a blink of an eye, he found that this student did not seem to be a professional mathematician, at least not a complete mathematician.

Jun Xin has a lot of respect for this elder who has always paid attention to and taken care of him, so he has no intention of hiding it, but even if he does not hide it, Jun Xin did not tell the whole truth: "When I sorted out the development of mathematics in the 80 years since the Hilbert problem, I found such a problem: that is, mathematics is often related to physics, and this connection is far more than mathematics and other disciplines. Seriously, since Newton used calculus to explain Newton's three laws, the branch of mathematical physics has been a de facto one. ”

"In the eyes of our traditional mathematicians, mathematics is a discipline that pursues perfection and rigor, and its own perfect properties often make us ignore the meaning of the problem itself in order to pursue its rigorous proof, so many mathematical results our group of mathematicians do not know their use, but those physicists see these things and use them to explain physical phenomena, such as the problem of Li Qun and so on."

"However, physics is slightly different from mathematics, especially theoretical physics, which requires the construction of a model, but there is no requirement for perfection, including quantum mechanics and relativity, which are actually theoretical models, the difference is that some of them have been proven."

After a pause, Jun Xin continued: "Actually, these are nothing, but the key to my study of physics is to understand a branch of physics, that is, mathematical physics. Different from the perfection requirements of mathematics, the imagination of mathematics and physics is more daring, and my thinking can play better when the requirements are not high. This also generates more inspiration. The kink problem was actually inspired by me when I was thinking about physics, which made me want to systematically learn about relativity and quantum mechanics. ”

Professor Hu couldn't help but smile bitterly: "Yes, I just wanted to ask you what you thought, but in the end, you gave me a long speech." Shaking his head, Professor Hu continued, "It's okay to study physics, but don't forget your job, you are also a mathematician. ”

"Don't worry, I won't forget!"

Tomorrow at four o'clock in the afternoon, Professor Zhou will come to my side, he has just come back from reviewing a project in the system, it is about building a large particle collider, you can prepare some materials in this area, and then you will have an hour and a half to communicate with him.

Professor Hu clearly reminded Junxin to prepare, and Junxin naturally felt extremely grateful to this respectable elder.

After Professor Hu left, Junxin naturally began to prepare materials according to what Professor Hu had revealed, and prepared the content of tomorrow's conversation with Professor Zhou.

The Large Particle Collider (LPC) mentioned by Professor Hu refers to the upcoming Beijing Positron Collider, referred to as BEPC, which is one of the world's eight high-energy accelerator centers, the first high-energy accelerator in China, and a major scientific and technological infrastructure for high-energy physics research.

The BEPC is composed of a 202-meter-long linear accelerator, a transportation line, a circular accelerator with a circumference of 240 meters (also known as a storage ring), a 6-meter-high Beijing spectrometer weighing 500 tons, and a synchrotron radiation experimental device around the storage ring, which looks like a huge badminton racket.

The Beijing Positron Collider was the only large-scale positron and positron collider in the world to study τ-cuon physics near the threshold of τ lepton and cuon particles, and it was also the brightest collider in this energy region so far.

The BEPC project was proposed by 18 high-energy particle physicists such as Chang Yu in August 1972, and was approved by the prime minister himself, and after repeated demonstrations, considerations, investigations, etc., it was formally approved on April 25, 1983, and the project was huge until 1990, when it was formally established and completed, all of which passed the national acceptance and were put into use.

Regarding the research of high-energy particle physics, Junxin knows and masters too many things, and naturally there is a lot of information, but for BEPC, Junxin has to sort it out. This made him look forward to the next day's meeting.