The birth of string theory has always been accompanied by pain and loneliness, Edward Witten said that superstring theory is part of the research of the twenty-first century, and it fell into the twentieth century.

The so-called one step ahead of the world is a genius, and two steps ahead of the world is a madman. So in the eyes of geniuses, what madmen do is often what they want geniuses to do. This is the case with the study of superstring theory.

String theory has been born since the use of Eulerian β functions to solve strong interactions, and for more than a decade, the real hot research on string theory was only the beginning. Later, because of the various problems of Bose string theory, the research on string theory could not be continued. However, in fact, the research of superstring theory has been hit into a trough by the emerging quantum chromodynamics. At its worst, Schwartz and Shekel were the only two people in the world who insisted on studying this theory.

Therefore, superstring theory is lonely, and because loneliness brings pain. Because one of the founders of the study of string theory, Professor Schekell, who was about to see the light of day, died of illness and almost did not return to the prototype of string theory.

Fortunately, in the end, string theory persevered and got new developments. Professor Schwartz found a new partner, and it took him four years to bring string theory back into the public eye, making it the most widely circulated and recognized model of unification theory.

When Junxin received the letter from Professor Schwartz, it was precisely when he had just found a new partner to study string theory after Professor Schwartz's death, and Junxin could naturally feel Professor Schwartz's emotions from Professor Schwartz's letter.

After thinking for a long time, Junxin began to pick up the pen and write.

"Dear Professor Schwartz,

Hello!

I'm sorry that I didn't write back to you until late September, and I explained the reasons to you.

I am a sophomore with a preference for physics, but I am a mathematics student, and my research interests are relatively broad, including number theory, algebraic geometry, mathematical physics, mathematical analysis, topology, etc., which are not listed here.

Studying string theory was the result of a very fortuitous situation when my girlfriend wrote a science fiction novel (she was a science fiction writer) about the theory of unification. You may not know that in our country science fiction has a very low status, and even has a certain resistance.

In order to relieve her of this pressure, I started working on string theory, until I recently got the results of this graviton calculation. After that, I was fascinated by the beautiful and profound picture of string theory, and I believe that I saw in this theory the future of Mr. Einstein's grand unification theory.

Thank you for letting me understand the tortuous history of the development of string theory, and I believe that future generations will remember our efforts, and Professor Schechkel's ten years of hard work will eventually become a beacon for the progress of human theoretical research.

I would also like to say that since I am still a sophomore, I can't make it to USC at the moment. Luckily, I was selected as the first Mizuki-Princeton exchange student, so I would spend an entire academic year at Princeton.

Also, I said that I am a mathematician by profession. I'm a mathematics student and I've made some achievements in mathematics. So I was scheduled to give an academic presentation next Saturday, September 23, in the lecture hall of Princeton University. I'll have some free time to host scholars from all walks of life, and if you don't mind, I can come to Princeton around this time, and at that time we may be able to dive into the prospects and trends of superstring theory.

Yours

Junxin, Princeton, September 15, 1981"

After writing the letter, Junxin didn't care about anything else, and plunged into the bed and began to sleep.

Over the next few days, as the time for the Modell Conjecture Mathematics Symposium in Princeton approached, professors from various schools and institutes who had been invited gradually rushed to Princeton.

The first to arrive was naturally a professor in the mathematics department of each of the schools that are also members of the Ivy League of Eight.

The first person at Harvard University is Professor Yau Chengtong, followed by a large number of the world's top mathematicians. For example, the first Fields Medal winner, Professor Als Alfors, who has the same name as Junxin's roommate, and David Bryant Manford, who is also a Fields Medal winner, etc. In addition, Mr. Als-Alfors is the winner of another award in mathematics this year, the Wolf Prize in Mathematics.

Receiving such a large lineup of Harvard University naturally does not need Junxin to come out in person. In fact, Junxin does not need to be responsible for the reception himself, and all the things have been handed over to the professors of the Institute for Advanced Study and the Department of Mathematics. In fact, the task of hosting Harvard University was entrusted to Professor William Thurston, who had recently made a name for himself in the field of mathematics.

The next lineup was also huge, with Stanford Fields Medalist Professor Bauer Joseph Cohen bringing a large group of Stanford professors to Princeton, and the reception was led by Princeton University Professor John Milnor, who is also one of the Fields Medal winners.

On Berkeley's side, Professor Steele Smale, who solved the high-dimensional proof of Poincaré's conjecture, brought Berkeley from the West Coast to the East Coast, including Professor William Thurston, and even Professor Yau and Professor Richard Hamilton came to greet him.

The University of California, Berkeley, was followed by the Massachusetts Institute of Technology, and MIT was led by Professor Daniel Quelen, and some mathematicians whose names Junxin could not name. After all, MIT has always been based on science and engineering in the world, so when it comes to engineering disciplines, there is no school that can compare with MIT, but this time the exchange is purely theoretical, and MIT actually has people. Professor Charles Feverman personally came out to greet this special group of guests.

After these big guests came, some relatively small mathematics schools began to arrive one after another, such as professors at Columbia University, Yale University, and the University of Pennsylvania in the Ivy League of Eight Schools.

In addition, some state universities such as New York University have also begun to come one after another, such as the University of Chicago, the State University of New York and so on.

Most of the first group were professors from various universities, and the second group of professors also rushed to Princeton in the afternoon, but these were no longer pure university professors. For example, Professor Chern Shiingshen, who has retired and served as the president of the American Mathematical Society, and a number of professors representing official status have also arrived one after another.

For a time, Princeton University became a place where the eyes of mathematicians from all over the world converged.