The École Normale Supérieure is one of the world's most international universities. Although the name is a bit strange and is named after the École Normale Supérieure, the name has never been the key to measuring a school, but rather the research capabilities and status of the college.

The École Normale Supérieure was founded by decree of October 30, 1794, the third year of the French Republic, with the initial mission of training citizens who had been trained in practical knowledge to learn the art of teaching under the guidance of the most competent professors in all fields. This school, which is almost the same age as the French Republic, has a history of more than 200 years since its inception, during which time it has produced many great men in science, culture and politics. As far as Junxin knows, Galois, the founder of group theory, Pasteur, a famous French scientist and microbiologist, Sartre, a famous French writer, and Pipondou, a famous French politician, are all students of this school.

Since the beginning of modern times, the École Normale Supérieure de Paris has made great achievements and breakthroughs in the study of mathematics and other sciences. There are 10 Fields Medal winners alone, four others winning the Wolf Prize in Mathematics and one Abbel Prize. In other natural sciences, there are 11 Nobel laureates. (As of 2013)

The École Normale Supérieure is a special school in that it became the center of mathematics in Europe after the dissolution of the Göttingen School, thanks to the special status achieved by its mathematical institute. Together with the Department of Mathematics of the Institute for Advanced Study in Princeton, it is one of the world's two major mathematics centers. Apart from the two, only the mathematics department of Moscow University in the Soviet Union is barely able to match it.

For any mathematician, Princeton's higher studies is a holy place, and the other is the École Normale Supérieure in Paris. For this reason, students from the École Normale Supérieure de Paris look down on students other than Princeton University, including world-famous universities such as Harvard, Yale, and Cambridge.

However, if you want to ask Junxin what his first impression of the École Normale Supérieure in Paris was, then Junxin will point to the scene that is happening in front of his eyes and tell you about the bull break of the École Normale Supérieure in Paris.

"Good morning, nice weather, can I go in?" Junxin asked the doorman, who had already looked very old.

"Oh, Oriental, good morning, may I ask you something?" The doorman seemed dutiful.

"No, I'd like to meet Professor Jean-Pierre Serre, a professor in the Department of Mathematics, I wonder if that's possible?" Junxin asked politely.

Professor Jean-Pierre Serre is a legendary professor in France, a Grand Slam winner of all awards in the world of mathematics. He won the Fields Medal and was praised by the famous mathematician Weyl as the first mathematician to win a Fields Medal for his work on algebra. In addition, he has won the Wolf Prize in Mathematics in the eyes of European mathematicians. He is also the first Abel Prize winner. As for some other awards, there are countless more.

"Oh, do you have an appointment?" Outside the door asked solemnly.

"I came here on an impromptu basis, and I didn't make an appointment in advance." Junxin replied.

"May I ask who you are?" Although he thought that Junxin in front of him was talking big, his good style still made the doorman ask politely.

Junxin replied, "I am a student from the Department of Mathematics of Shuimu University in China, and my name is Junxin. Junxin replied. He felt that the French he had secretly learned some time ago was becoming more and more fluent the more he spoke.

"Junxin, Junxin..."The doorman muttered a few words, he felt that the name seemed a little familiar, but for a moment he couldn't remember where he had seen it, "Young man, if you are here to visit, please come back after three o'clock in the afternoon!" ”

"I'm not here to visit, sir!" Junxin patiently replied, "I am not only a student at Mizuki University now, but also an exchange student at Princeton University. I'm here to find Professor Jean-Pierre Serre, please let me in! ”

"So you're from Princeton University." "But I would like to know why you came to Professor Jean-Pierre Serre." You know, a lot of people come to him every day, and I have to sift through the visitors. ”

"I really didn't have anything special, I came to visit the professor just because I was going to Canada and passing through France. Drop by for a visit. Junxin continued, and there was no impatience. As a scholar of the level of a national treasure like Professor Jean-Pierre Serre, the doorman's inquiry was a routine matter.

"Okay!" The doorman looked at Junxin and said, "Why do I always think your name is familiar?" ”

"Maybe you saw my name on one of the papers..."Jun Xin hesitated for a moment and guessed.

"Ah, I remember..."The doorman suddenly stood up, changed the formulaic attitude he had used to speak to Junxin before, ran out of the door and pulled Junxin and said, "You are the gentleman who proved Modell's conjecture, right?" Welcome to École Normale Supérieure de Paris! ”

"Uh, what are you?" Junxin said that he was a little confused about the situation.

"Hello, I'm the janitor here, my name is De Serdo Casston, and I turned out to be a professor in the mathematics department of this school."

After hearing this, Junxin instantly felt messy in a gust of wind. When did the people who watched the doors of the École Normale Supérieure de Paris become professors? It's also too much to believe.

As if seeing Junxin's surprise, Caston explained with a smile: "I was originally from the Higher Normal College, and since I retired, I felt uncomfortable staying at home. ”

"I see that the journal you just held seems to be the latest issue of Acta Mathematica Sinica, right? You can see that you can easily read the latest research papers that are currently available! Junxin shook his head and praised.

"Hehe, don't you say that I didn't remember that your article was also published in this issue. I've taken a look at your proof of the estimation of the twin prime conjecture very well, and I just happen to have some questions I want to ask. But let's take you to Monsieur Jean-Pierre Serre. ”

"Oh, thank you!" Junxin thanked him, then looked at the magazine and said, "I didn't expect that my paper has been published, and I don't have any information at all." ”

"Maybe it's because the transatlantic mail is slow! Please go this way. Professor Caston explained as he led the way.

"Indeed." Junxin shook his head and said, "I thought this article was rejected, there has been no news for so long, but I just came to France and learned that the article has been published, which can be regarded as a very good start to this trip." ”

"It's here, please wait a minute." By this time, Caston had arrived at an office door with Junxin, and Mr. Doorman raised his hand and began to knock on the door.