Under Delinene's introduction, Pang Xuelin and this group of bigwigs got to know each other again.

Some of these people have already met in the real world, while others are meeting for the first time.

That evening, Deligne hosted a buffet at a hotel near Princeton University to welcome Pang Xuelin.

After eating, at the invitation of Deligne, Pang Xuelin and Deligne walked around the town of Princeton.

Princeton, located between New York and Philadelphia, is a town with a unique character.

Located in the Delaware Plains of southwest New Jersey, the town covers an area of about 7 square kilometers, bordered by Lake Carnegie to the east and the Delaware River to the west.

The town's tranquil scenery, tree-lined greenery, clear river water, and Princeton University's rich cultural influence make this town a popular place for the upper class of Americans.

As a world-class university, Princeton University has a small number of students, including about 4,600 undergraduate students and about 1,800 graduate students, and the student-to-faculty ratio of the whole university has reached an astonishing 6:1.

At the undergraduate level, Princeton is in a league of its own.

In particular, in the field of mathematics, Princeton University and the Institute for Advanced Study in Princeton together constitute a world-renowned center for mathematical research.

In the real world, when Pang Xuelin graduated from Jiangcheng University as an undergraduate, his first choice was Deligne's graduate student, but unfortunately this big guy didn't take a fancy to him, and in desperation, Pang Xuelin had to go to ULCA to find Tao Zhexuan.

Although he came to Princeton later, he only passed by in a hurry, and never once did he enjoy wandering the streets of this town so much as he does today.

"Pang, your paper on the proof of Fermat's conjecture is very ingenious, I have studied it no less than ten times, and found that some of the theoretical frameworks used in it are very interesting, a bit like the far abelian geometry once proposed by my supervisor, but it seems to go one step further, have you considered further refining this theory?"

Deligne said as he walked.

Pang Xuelin smiled slightly and said, "Professor Deligne, are you talking about Ponzi geometry?" ”

"Ponzi geometry?" Deligne was stunned for a moment, turned his head to look at Pang Xuelin, and said in surprise, "You have sorted out this theory?" ”

Pang Xuelin nodded and smiled: "It has indeed been sorted out, and I am going to give a lecture on this theory at this report meeting." ”

Deligne was stunned for a while, and then said with a smile: "Pang, I was originally a little worried, whether you would have problems at the report meeting because of external pressure, but I didn't expect you to be in the opinion of the accident world at all, and you actually wanted to talk about your new theory at the report meeting......

Pang Xuelin laughed and said: "In fact, as long as you understand the core concept of Ponzi geometry, then you will naturally be able to understand the proof logic of Fermat's conjecture, and I am not off topic." Professor Deligne, in fact, you are right, my theory of Ponzi geometry was indeed developed on the basis of far abelian geometry, and I have always wanted to meet Monsieur Grothendieck and discuss my theory of Ponzi geometry with him, but unfortunately I heard that Monsieur Grothendieck, after retiring from the University of Montpellier, lived in seclusion in the Pyrenees and did not see any strangers......"

Deligne frowned and said: "After the teacher retires, it is true that there are no outsiders, and even if I want to see him, it is also difficult. But Pong, if you really sort out the theory of Ponzi geometry, I can help you pass it on to the teacher to see, maybe the teacher is interested in meeting you. ”

"Really?"

Pang Xuelin's eyes lit up, Deligne was a student of Grothendieck.

In the real world, Grothendieck died in 2014, and Pang Xuelin did not have the opportunity to meet him again.

If you could meet the world of country teachers and the pope of algebraic geometry, the greatest mathematician of the twentieth century, Grothendieck, you might have a windfall.

At least, the manuscripts that Grothendieck burned before his death may have been met by Pang Xuelin.

"I'm at least 80 percent sure that you're a genius boy who solved Fermat's conjecture, and probably the youngest Fields Medal winner," said Deligne. The Ponzi geometry theory framework is grand, and the tutor will definitely be interested in you! ”

Pang Xuelin said: "Professor Deligne, then I will sort out the relevant theoretical materials of Ponzi geometry for you as soon as possible, and then I will trouble you a lot!" ”

Deligne smiled: "Okay, you give me the information, and I will arrange it for you as soon as possible." ”

……

In the next two days, Pang Xuelin, under the arrangement of Deligne, visited Princeton University and the Institute for Advanced Study in Princeton, and met many bigwigs in other professional fields.

It was not until the third day, March 18, 1993, that Pang Xuelin officially held an academic lecture on Fermat's conjecture in the auditorium of Princeton University.

The presentation attracted the attention of the global media.

In the past few days, Pang Xuelin's name has frequently appeared in major media around the world.

Whether the twenty-year-old actually proved Fermat's conjecture has become a point of contention.

The side that supports Pang Xuelin believes that since Pang Xuelin has decided to hold a report meeting in Princeton, it means that he is 100% sure, otherwise there is no need for him to stand up and let the world's top mathematicians find faults.

The opposing side argues that Pang Xuelin, who is only 20 years old and has never received professional academic training, is not capable of solving such problems, and that he is just a puppet figure introduced by the Chinese government.

The information of all kinds of arguments is flying all over the sky.

As a result, hundreds of media outlets from around the world gathered at Princeton on the day of the presentation.

With the consent of Pang Xuelin and Princeton University, reporters were allowed to enter the conference, and CNN even obtained permission to record the whole report.

At half past eight in the morning, Pang Xuelin finished breakfast at the hotel, went back to his room to change his clothes, and then went straight to the auditorium of Princeton University accompanied by Xie Yongxin.

At the entrance of the auditorium, Deligne, as the host, is welcoming mathematicians from all over the world.

David Bryant Manford, Charles Feverman, Daniel Queeren, William Thurston, Yau Chengtong, Morishigefumi......

Seeing the characters whose names were engraved in the history of mathematics in the twentieth century appear at the report meeting one by one, even Xie Yongxin, who had been following Pang Xuelin, became a little excited.

Although he is the president of the Chinese Mathematical Society, there is still a certain gap between his academic status in the international mathematical community and these famous figures.

At nine o'clock in the morning, after a lengthy speech by the host of the report meeting, Pang Xuelin stepped onto the rostrum.

There was a burst of exclamations from the audience.

Many mathematicians are meeting Pang Xuelin for the first time.

Although they have long known that the Chinese who proved Fermat's conjecture have just turned twenty, after really seeing Pang Xuelin's slightly immature face, these mathematicians really feel the impact of young people.

"Hello everyone, I'm Pang Xuelin, and I'm very happy to be able to communicate with you at Princeton today on the Fermat conjecture."

Pang Xuelin's tone was unhurried, he had already experienced this kind of scene many times, and he didn't feel the slightest nervousness.

"Before I begin, I would like to express my gratitude to Princeton University and Professor Deligne for all the work that has been done to prepare for this presentation."