In September, Shen Qi became a lecturer in the Department of Mathematics at Princeton, and he moved into the faculty apartment and became a full-time faculty member at Princeton.

Lecturer Shen Qi's annual salary is $85,000 before taxes, and if promoted to professor, the annual salary will exceed $200,000.

In the United States, an annual personal income of $50,000 is the standard for the middle class.

Shen Qi's personal annual income is 85,000 US dollars, which is close to the standard of the upper middle class (100,000 US dollars per year).

Even a native, well-educated white American would have to struggle for many years to reach Shen Qi's salary.

Princeton has a lot of money, and if you can get a job in Princeton, you can live a decent and high-quality life in the United States.

The position of lecturer is of a transitional nature, and Shen Qi knows very well that he is a man who wants to become a professor.

Although it is a transitional nature, Shen Qi is also very serious and responsible for the position of lecturer, handouts, and class preparation, and is fully prepared.

According to the organizational arrangement and personal wishes, the first formal course taught by Shen Qi in his career was number theory.

There is no doubt that Shen Qi, who proved the Riemann conjecture of the millennial problem of number theory, has the academic level of independently teaching number theory courses.

At Princeton, a specialized course is often taught by several teachers.

This semester's undergraduate number theory course was jointly completed by full professor Lyndon Strauss and lecturer Shen Qi.

Elon LindenStrauss is the 2010 Fields Medal winner and the top master of number theory.

Shen Qi has six mathematics awards, four of which are international awards, and his most important achievements in the field of number theory are the proof of the Riemann conjecture and the Walsh conjecture.

Professor Linden Strauss + Lecturer Shen Qi form the strongest undergraduate number theory teaching team in the history of Princeton.

Shen Qi discussed with Lyndon Strauss, let's start five or five, this semester's undergraduate number theory course, we will talk about half of it.

If this were an ordinary lecturer, Professor Lyndon Strauss kicked him away.

The practice of the university is that if a professor and a lecturer are in charge of a professional course, the professor is responsible for 30%-40% of the teaching hours, and the rest of the class hours are given to the lecturer.

Moreover, Professor Linden Strauss is a Filipino Prize winner, and he can complete 20% of the undergraduate teaching hours in one semester, which is a great responsibility.

Shen Qi is not an ordinary lecturer, so Professor Linden Strauss accepted Shen Qi's suggestion: "Okay, Qi, one and a half." ”

"Elon, I'd like to talk to you about having a few more classes in September and October. In November and December, all the remaining number theory courses will be handed over, and it will be no problem. Shen Qi said.

"Do as you wish. Lyndon Strauss knew that Shen Qi had been very busy preparing the report of the International Congress of Mathematicians recently.

The first number theory class of the semester was completed by Lyndon Strauss.

In the second number theory class, it was Shen Qi's turn.

It was a big class, and the big classroom was full of undergraduate students in the mathematics department.

Number theory is a compulsory course for undergraduate students in the Department of Mathematics of the University, and according to the curriculum, it is arranged to be studied in the second year.

Number theory is simple and simple, but difficult to say.

Elementary number theory and general Diophantine equations, even with a little effort on the part of engineering students, it is not difficult to get A.

The hardest part of number theory is analytic number theory.

Analytic number theory is recognized as hard analysis, and not everyone can learn and play 666.

The Riemann conjecture is a conjecture related to analytic number theory.

"Of course, in the second year, the Riemann conjecture and analytic number theory are too difficult for you, but in graduate school, you can study them more deeply. Shen Qi's lecturer debut is a decent performer, and his task is to lay a solid foundation for undergraduate students in the Department of Mathematics at the University.

"Hey, Dr. Shen, it should be called Riemann's theorem now, that's what the textbook says. One boy said aloud, his eyes full of adoration: "It was you, Dr. Shen, who proved the Riemann conjecture, so we can directly quote the conclusion of Riemann's theorem." ”

"Yes, Dr. Shen, tell me how you completed the Riemann conjecture proof!"

Sophomores are passionate, curious, excited, and energetic.

Shen Qi shook his head: "Don't say it." ”

"Say it!"

Shen Qi said: "According to the teaching plan, the part of Riemann's theorem is explained by Professor Lyndon Strauss, and then we enter the study of the Diophantine equation. ”

Ay...... The students let out a sigh of disappointment.

"The general Diophantine equation is very simple, but the complex Diophantine equation is extremely difficult, the most famous case being Fermat's theorem. ”

"Before we understand Fermat's theorem, let's first understand Walsh's theorem. ”

Shen Qi wrote down an equation on the blackboard and knocked on the blackboard: "The content of Walsh's theorem is that if a and b are positive integers, then the equation aX^4-bY^2=1 has at most two sets of positive integer solutions (X, Y), which is a basic theorem in the Diophantine equation. Forget Riemann's theorem, kids, this is just your second number theory lesson, and laying a good foundation is more important than anything. ”

The students flipped through the books and took notes, and suddenly, someone said, "Walsh's theorem used to be called Walsh's conjecture, and the reason why it became a fundamental theorem of the Diophantine equation is because Dr. Shen proved it, a great work." ”

Shen Qishun looked at it, and it was a white boy who was not good-looking, and he wore glasses.

"What's your name?" asked Shen Qi.

"Bell, Andy Bell. The man with glasses said.

Shen Qi expressed his gratification: "Andy, you are very studious, I hope to continue to keep it." ”

The man with glasses was encouraged: "I will." ”

The whole world knows that the Riemann conjecture was proved by Shen Qi, but I didn't expect another theorem in the textbook, the basic theorem in the Diophantine equation, Walsh's theorem was also proved by Shen Qi.

In the new edition of Princeton's undergraduate number theory textbook, Riemann's theorem and Walsh's theorem can be directly used, and Shen Qi has made certain contributions to the fields of analytic number theory and Diophantine equations.

"Tell me, Dr. Shen, how did you prove Walsh's conjecture?"

The crowd was once again excited, and the two mathematical theorems in a textbook were proved by the same person.

And this man is still alive, still very young, and he is standing on the podium.

He proved this fundamental theorem, and he is explaining this fundamental theorem in textbooks.

The children's curiosity was particularly strong, and Shen Qi refused to explain the detailed proof process and mental process of the Riemann conjecture, but he could not continue to refuse Walsh's request for the conjecture.

The students were so fascinated that they listened to Shen Qi tell how he had completed Walsh's conjecture proof.

“…… The most crucial step was the effective algebraic approximation, and it was a cloudy day, with moderate temperatures and a pleasant climate, and I completed the proof of the Walsh conjecture. Yes, in the latest number theory textbooks, it becomes Walsh's theorem, and I hope you don't lose scores on this fundamental theorem. ”

Shen Qi ended his first lecturer course, and the effect was not bad.