"Is the lesson over?" When he returned to the office, Junxin had not yet sat down, and Professor Thurston, who had been waiting in the office, couldn't wait to ask.

After Junxin put down his burden, he replied: "Yes, it's just a very simple theory, a lot of knowledge is theoretical, because of the problem of time and class time, I can only explain so many things for the time being, mainly involving physics and chemistry, and other content about biology and computer is put in the lecture notes later, but I shouldn't have time to talk about it, I will hand over the lecture notes to you later, and if you have time, you can arrange it!" ”

"Are you really not thinking about staying?" Professor Thurston shook his head and asked, but there was still a little expectation in his tone, although Junxin had clearly rejected the requests and suggestions of Professor Thurston and other professors from Princeton to stay in the school, but everyone still very much hoped that he could stay.

Junxin shook his head and didn't answer, but this already represented Junxin's attitude.

"Okay!" Junxin's answer had been expected, but Professor Thurston was still a little disappointed, but he didn't say anything. Much has been said about what has been said before, and there is no need to say anything more.

"By the way, Professor Feverman's assistant just came to look for you, you weren't there, he put down his things and left, let me tell you that this is what you want, some of them are gifts for you, some of them are lent to you, these are some manuscripts in the form of unique copies, and we have to recycle them in the library." Professor Thurston stood up and pointed to the pile of new books on Junxin's desk.

"Thank you!" Although Professor Feverman had already said it before, it was only after he got the things that Junxin felt a burst of relief.

In the United States, although diplomatic relations have been formally established between China and the United States, the collections of books in some scientific research institutions are still blocked by Chinese, and with Junxin, many of the materials he wants to review cannot be obtained. But with the help of Professor Feverman, who is not only an American, but also the head of the Department of Mathematics at Princeton University, as the head of the Department of Mathematics, and also one of the top leaders of the school, he is absolutely qualified to borrow any materials in the library, and he is willing to help, saving most of Junxin's energy.

"I just took a look at the information, it's very comprehensive!" As a professor at Princeton University and a mathematician of high international standing, Thurston is naturally qualified to know these materials, and he is naturally very familiar with them.

Jun Xin glanced at the list of books, and he was also surprised for a while, many things in it, many precious materials that even he had not touched or borrowed in his previous life, which made him very excited.

"Thank you so much Professor Fefferman, these materials have been of great help to my research!" Junxin casually flipped through one or two books, and said involuntarily.

"Okay, you have time to sort out the information later, and now I have something I want to talk to you about!" Professor Thurston interrupted Junxin's preparation to read the book now, and once Junxin got into reading the book, it would be difficult for him to talk to him about the next thing.

It's not that there is anything important about the next thing, but because it is related to Junxin, it is very likely that Junxin will not be able to concentrate on thinking!

Professor Thurston is still very recognized, this is a professor who has real academic achievements, and at the same time likes to promote the younger ones in daily life, since Junxin entered Princeton, it has been of great help to Junxin. Although it is because after Princeton, Junxin Research is more of an overlap with Professor Thurston's research field, so there are more reasons for the communication between the two.

"Please say, I'll read the information later!" Junxin was also curious about what Professor Thurston was going to say, and he had the impression that Professor Thurston had never cared about administrative roles, although Junxin had seen him acting as an administrative officer many times.

"Since you have chosen to return to China, although we have tried to keep you in many ways, your mind will not change, and we will no longer force it. But the Chancellor told me that you had accomplished tremendous things during your time at Princeton, and that they were at the same time a source of pride for Princeton, so we decided to award you a Ph.D. in mathematics from Princeton University! ”

"My pleasure!" Jun Xin's eyes finally took his eyes off the information completely, and he was surprised for a long time before he said. In his previous life, although he also received a Ph.D. from Princeton University, he only received a Ph.D. in physics from Princeton University, not a Ph.D. in mathematics.

Princeton, as the mathematical center of the United States, is also one of the world's mathematical centers, has a very lofty status, naturally the status of the doctor of mathematics is more golden, although Princeton is the place where Einstein lived in his later years, but Einstein in his later years has not made any outstanding achievements, Princeton to Einstein's significance, more is a place to retire.

"Is there anything I need to do?" Jun Xin, who had been stunned for a long time, came back to his senses and said to Professor Thurston.

"According to Princeton University's regulations, in order to obtain a Ph.D. in mathematics at Princeton University, you must first make an achievement and submit a research paper. Although you are exceptionally promoted to confer a degree, the school still expects you to submit a doctoral thesis as your graduation thesis, how about it, do you have any opinions? ”

"Any requirements?" Junxin asked.

"A sufficiently weighty paper is fine, there are no hard and fast requirements, the topic or research topic is up to you."

"What about the defense? And a mentor or something, is there? Junxin asked curiously.

"If you want to defend yourself, a defense committee will be formed by all the professors of our mathematics department, but this shouldn't be a problem for you, right?" After seeing Junxin nodding, Professor Thurston also felt a little amused and said, "As for the mentor, haha, it's really not that I say anything, I'm afraid that no one in the whole Princeton dares to think of himself as your mentor, right?" ”

Jun Xin nodded with a smile and said, "I don't think that's the case, right?" In fact, every professor at Princeton has his own research direction, and he is an elite and expert figure in his own research field, so it is no problem to be my mentor in their own field, right? ”

"The question is, who?"

"Why don't you be my mentor?" Junxin didn't bother to spend brain cells, shook his head and said.