"Are you serious?" Professor Mirno put away his cynical attitude and stared at Junxin with a serious expression.

Junxin also put away his playful mentality, nodded and said: "Regarding the four-dimensional Poincaré conjecture, I already have certain thoughts and ideas, but there are still some questions to be clarified about some of Mr. Donaldson's results, so I will take a certain amount of time to communicate with Mr. Donaldson during the meeting, I think there should be no problem." ”

"Okay, I'm going to thank you for Papa, I'm one step away from the final result." Professor Mirno laughed.

After Professor Mirno left, Junxin naturally found Professor Chern Shiingshen, who had served as the first president of the American Mathematical Society, as soon as possible. After all, among the many people present, in addition to a few professors from the Institute for Advanced Study in Princeton, the only one who maintained contact and correspondence with Junxin was Professor Chen.

"Hello Old Chen! I'm so happy to finally be able to meet you! Jun Xin walked quickly in front of Professor Chen in three steps and two steps, and said respectfully in Chinese.

At this time, Professor Chern was talking to Professor Steele-Smale, who had taught at the University of California, Berkeley, and retired from the University of California, Berkeley, who had proved the high-vey Poincaré conjecture. Therefore, I am relatively familiar with the professors at Berkeley, and Professor Steele-Smale is Professor Chen's colleague at Berkeley. Although the two have different research directions, as two people who have already walked at the peak of mathematics, there are still many topics to talk about.

"I'm sorry to disturb your conversation with Professor Chen, but can I talk to Professor Chen for a moment, Professor Smale?" Jun Xin said politely to Professor Smale.

Professor Smale smiled understandingly, and said, "Naturally, if Chen doesn't object." But I don't think he'll object. I've read your paper on Modell's conjecture, and it's wonderful! ”

"Thank you, Professor Smale! It's a brilliant idea for you to find a way to skip the low-dimensional ones and prove the high-dimensional Poincaré conjecture first. I read that paper of yours and it was very enlightening to me. Recently, I discussed with Professor Thurston the classification of the leaf-like structure of three-dimensional manifolds, and I have some ideas for Mr. Donaldson's research on the Poincaré conjecture, and I have some ideas for the four-dimensional Poincaré conjecture. ”

"Oh? Are you working on the Poincaré conjecture? Of course, there is time, there is no time limit for this exchange meeting, and we can communicate with each other at that time. Professor Smale agreed.

"Thank you!" Junxin nodded and said, "Then I won't bother you!" ”

"Is what you just said true?" Professor Chen asked in surprise.

Junxin nodded and said, "That's right, I already have a certain idea of the four-dimensional Poincaré conjecture, but there are still some details that I haven't figured out, so I need to visit the senior professors." After finishing speaking, Junxin smiled slightly, "Don't talk about this, I'm really happy to meet you, Professor." I've heard from you many times over there, and I'm really happy to see you now. ”

"Hehe, I'm just an old man, and I'm not a big beauty, what's there to be happy about." Professor Chen's tone was gentle, and he said unhurriedly, but the content of what he said was a hint of self-deprecation.

"You're laughing!" It's really hard to accept this gentleman's letter.

"How is Brother Hua doing?" Professor Chan didn't go on and changed the subject.

"Hua Lao's health is not bad. Before I went to Canada to join the International Union of Crystallography, I also met Mr. Hua Lao, and I met Mr. Chen Jingrun under the recommendation of Hua Lao, and I learned a lot. Junxin replied with a smile.

"Haha, that's good!" Professor Chen smiled and said, "Brother Hua's heart is not very good, so although he usually behaves relatively healthy, but because he is also old, it is relatively not very good. Last year, he happened to come to the United States, and I met him at the Institute for Advanced Study, and he mentioned you to me. I am very satisfied with your compliments. ”

"That's Hua Lao's praise." Junxin shook his head and said, "Frankly speaking, I don't doubt my talent, before I came to Princeton, because I made a series of number theory achievements such as the Modell conjecture, I began to become a little fluttery. However, after arriving at Princeton, I realized that my previous vision was really a little too narrow. Number theory is just a branch of mathematics, and although it is very difficult in itself, it has a low impact on other disciplines. At present, the hot research in the world mainly focuses on algebraic geometry, topology, calculus equations, Riemannian geometry, etc. ”

"Far from it, let's just say that the quasicrystalline matter I discovered before, when I did mathematical analysis, most of them used geometry, and algebra, it seems that there is only one group theory."

From this point of view, geometry will be the key to the development of the next few decades, including algebraic geometry, differential geometry, topology and other branches. In the past, I was still too narrow-minded, but I am glad to be able to get an exchange student quota this time, which allows me to see my shortcomings and the possibility of further improvement. Junxin said this, sighed slightly, and said.

He did have the idea that he had become a little narrow-minded, and if he had always kept a low profile in his previous life, he would not have said anything to discuss the issue of science fiction with Mr. Qian Xuesen in the newspaper, but the reality is that he did.

"How do I feel like you're being too yourself?" Professor Chen said with a hint of unbearability in satisfaction. In his eyes, Xiang Junxin has made achievements that shocked the world at his age, but he did not have any pride, but he was more strict with himself. This made him very satisfied, but at the same time, he also had a little bit of patience for Junxin's approach, after all, how to look at it, Junxin was just a teenager who was less than twenty years old and only eighteen years old. This age is the age of playfulness and escape, but Junxin's body does not see the characteristics of this young man, but a kind of middle-aged steady, down-to-earth and heavy.

Jun Xin just smiled and did not answer Professor Chen's question, but instead changed the topic and began to ask some questions about differential geometry that he had already prepared.

Professor Chen saw that Junxin did not answer his question, so he naturally understood what Junxin meant. He first met Junxin in the mouth of Hua Lao, who told him that there was a mathematical genius in the Department of Mathematics of Mizuki University, and he proved Modell's conjecture in college. At that time, he combined with China's national conditions, thinking that after returning to the city, he went to the Department of Mathematics of Mizuki University, and thought that he was more than 30 years old.

Later, when he saw that he was old in the next pen, he didn't doubt this idea, but when he saw it today, he knew that he was only an eighteen-year-old boy, and completely subverted his own thoughts. After this dialogue, Professor Chen's opinion of Junxin has been extremely good. Therefore, the questions raised by Junxin were naturally answered carefully and unreservedly.