In the library, Zhuang Wen, who was in a bad mood, saw others holding his papers, and criticized again, Zhuang Wen instantly became angry, if it weren't for the library, Zhuang Wen felt that he couldn't help but punch it, and said angrily: "Dude, who are you!" ”

Han Sen didn't expect this young man to be so angry, so he immediately whispered: "Don't care who I am, you sit down first, let's take a look at your paper together." ”

A complete mathematics paper, the first part of the opening is a preface, first briefly talk about what you write in your paper, introduce the latest research results in this field, such as what Professor so-and-so has studied, what Professor so-and-so has views, etc., and then say what you have solved.

The preface of Zhuang Wen's paper talks about the significance of Professor Han Sen's research on partial differential equations, what Professor Han Sen said, and so on.

This made Han Sen unhappy, and said to Zhuang Wen: "Look at the preface first, you can really pull the banner indiscriminately, Professor Han Sen has said so!" ”

Zhuang Wen immediately opened his mouth with righteous words: "That is, when Professor Han Sen was a graduate student at Princeton University, he studied partial differential equations, and his graduate thesis published in the Annals of Mathematics was about partial differential equations, who are you!" I don't know if I'm still talking nonsense. ”

"yes, it's embarrassing!" Han Sen thought about it, his graduate thesis was his first "Annals of Mathematics" paper, and the release was about partial differential equations.

Then, Han Sen flipped through the preface, revealing the content of the paper, Zhuang Wen was stunned, my God, all his papers have been scribbled, that young anger.

Han Sen picked up the pen and said: "Then we won't say the preface, the preface is useless,

First of all, you can see that it can be fully embodied here, z=u(x,y)

Of course, t is written as y here to better understand the geometric meaning, and the essence of the equation has not changed.

And then I saw that I was going to change.

z=u(x,y)→g(x,y,z)=u(x,y)—z, what is it? Equal to zero, right? ”

"Huh?" Zhuang Wen was stunned, he, he really read my paper seriously! My paper was really read carefully?!

Han Sen didn't care about the young man's surprise, and continued:

“......

It can also be seen from here the importance of the initial condition, if there is no ABen or RBen, then there are actually infinitely many tangent vectors of the surface (the general solution form here can be understood as the plane composed of the rotating tangent vectors), which is a geometrical explanation of how to determine the uniqueness of the solution of the equation, and the direction of the characteristic line is selected, and the uniqueness of the solution is determined.

So, you ignored the initial test conditions from the beginning, and I think this is your own problem. ”

Then Han Sen spoke: "Look at your paper, it's all together, and it's not good to make it up!"

Also, change the title to "Research on the Application of Sun-Han System in the Analysis of Partial Differential Equations", what is Senhan, Senhan, if you want the whole text to be in English, you can write "Sun-Han", you are clearly Chinese, get a Senhan, my surname is Sen!

Sort it out, either publish the "Journal of Tsinghua University" or the "Annals of Mathematics" in English."

"Ahh Zhuang Wen took his paper with a confused expression, because the paper was his own thought, so he would keep up with Han Sen's train of thought very well, he was completely impressed by Han Sen's revision, big bull!

"Hey" Han Sen sighed: "The current students are really not as good as one class. ”

"Huh?" Zhuang Wen was stunned again.

Han Sen still likes this student more, although there is a lot of water in the paper, and all kinds of ideas are very immature, but the ideas are very novel, and the logic of the words also shows that this teenager has a solid mathematical foundation, and should be a good seedling with ability and potential, Han Sen opened his mouth and asked, "Ah what?" Did you get into graduate school? ”

At this time, Zhuang Wen no longer had the initial anger, and shook his head dumbly and said: "No, I don't have money to go to graduate school, and I found a job in data analysis at Goldman Sachs." ”

Han Sen opened his mouth and asked, "You have your report card!" ”

"Yes, yes." Students in the graduation season always have a spare transcript in their school bag.

Zhuang Wen immediately took out a transcript from his schoolbag.

Han Sen took a single look at the grades, most of them were above 90 points, and the evaluation of several elective courses was also excellent, and Han Sen was quite satisfied.

Han Sen, who had just become a professor in the Department of Mathematics at Tsinghua University, said, "Not bad! I have an enrollment quota in the mathematics department next year, which was originally prepared by my brother-in-law, if you are willing to go to graduate school, but come to me, I will add another one to you.

As for money, if the family conditions are not good, Xintai encryption, Xintai technology manufacturing, I will find you a position at will, if you are really capable, the cost of graduate school will be enough. ”

"You, no, you, you can't be Professor Han Sen, right?" At this time, Zhuang Wen said a question with a face full of disbelief that shocked him.

Han Sen didn't answer his question, but took out a business card of Zhang Bin and said, "This is the email address and phone number of one of my doctors, if you have something to look for him, don't trouble me." ”

With that, Han Sen left, staying all afternoon, so hungry.

And then the business card Zhuang Wen, I was so stunned.

......

"Done?"

Zhuang Wen, who had finished correcting his thesis overnight, decided to take his corrected thesis to his supervisor, Professor Chen, to take a look, which was a basic respect.

"Yes." Zhuang Wen nodded, and then he added: "A professor in the library changed it for me. ”

Sitting on the chair and cocking Erlang's legs, Professor Chen listened to Zhuang Wen's last sentence, became interested, and opened the paper.

Professor Chen took a brief look, it was not bad, the basic format was very beautiful, and it was more than enough to complete graduation, this student found a good job at Goldman Sachs, and he was still a good child, but unfortunately his family conditions were a little worse, otherwise he would have made greater achievements in continuing to explore and explore on the road of scientific research, but everyone has their own ambitions.

Unlike the young Han Sen, Professor Chen, who has gone through vicissitudes, is reluctant to meddle with other people's affairs.

And when he continued to read, Erlang's legs were put down in surprise, and he was deeply attracted by this paper at once.

"Oh my God!" When he finished reading the last character, Professor Chen said with a look of incredulity: "This, this is what you wrote?" ”

New ideas are always new and scary, and this paper will have a crucial impact on the study of the field of string vibrations.

Zhuang Wen was taken aback by the professor's excitement and said, "It's mainly mine, and then it's been perfected." ”

The "top brand" of Shanghai University of Finance and Economics is a financial class, mathematics is not top-notch, but this paper is top-notch, Zhuang Wen's child may be a good jade, but what is even more powerful is the top artist who carves this jade.

When did the library of Shanghai University of Finance and Economics have such a great god, Professor Chen asked excitedly: "Who is the professor who revised for you, do you know?" ”

Zhuang Wen was a little frightened by Professor Chen's excitement, and whispered: "Yes, it's Professor Han Sen, and then, he, he, gave me a chance to study in his graduate school!" ”

When Professor Chen heard this, he patted Zhuang Wen's shoulder excitedly and asked, "You, are you sure it's Professor Han?" ”

"Hmm."

Professor Chen still doesn't believe it, who is Han Sen? If he came to school, it would be a very sensational thing, how could he not know, "Wait a minute, I'll call the school and ask." ”

The school of Shanghai University of Finance and Economics had just received the news from the library, but when the school leaders arrived, Han Sen had already left.

......

After hanging up the phone, Professor Chen was really happy for Zhuang Wen: "Oh, it's skyrocketing, young man, it's good!" Not bad! ”

He has good potential and a good opportunity, and it is clear that after a few years of loneliness that this student can endure, his future is limitless.

"Come on!"

The professor guessed correctly, in the future, the 41-year-old Zhuang Wen and the 45-year-old Zhang Bin successfully ran for academician, and then Academician Zhuang Wen became a top expert in the field of Chinese aero engines.

In the library of Shanghai University of Finance and Economics, there is also a good story of teachers and students that is becoming more and more evil.