After reviewing the first few questions, Professor Wang Zhong glanced at Zhang Yuan and said slowly: "The handwriting is not bad, quite neat." It's not like some people use a lot of computers, they can't even write, and they crawl like dogs. ”

Xu Yunjing, who was standing on the side, turned red, shouldn't it be her?

No!

Someone else for sure.

Wang Zhong didn't care about Xu Yunjing's expression, in his cognition, it is a student's duty to answer the first few simple questions correctly.

Looking at it again, the questions of medium difficulty were also answered correctly.

The proof is not bad, but the way of thinking is a little strange, and it is a little different from the normal way......

All in all is quite correct.

Wang Zhong took a long breath, looked up at Zhang Yuan, and the anger in his heart slowly disappeared.

If you look closely, this young man is actually quite good-looking, quite handsome, a bit like his father when he was young.

More than 30 years ago, the days and nights when teachers and students struggled together have passed for a long time, and they seem to be close at hand.

Time flies!

The old people are always a little nostalgic. After reviewing the test papers, he thought to himself, since these questions have been done correctly, and the young man's level is still a little, he will no longer investigate whether you have gone through the back door.

500,000 people, and it is impossible for everyone to be born saints, there is always a little remnant of habits on the earth, which can only be slowly corrected later.

If there is no such thing as human affection, it is too cold and insecure; However, if it becomes a humane society and bureaucracy prevails, it will inevitably be a great disaster for a civilization.

Read on.

Hey, those difficult ...... in the back

That's right, too!

Not bad, very good!

Even some of the brighter students may not be able to get these questions right.

Wang Zhong's stiff face began to melt, which was a sign that his mood was beginning to improve.

Blame the young man, at this level, there is no need to go through the back door at all, and an astronaut exam is not easy.

Seeing Professor Wang's softened expression, Xu Yunjing also breathed a sigh of relief, and swallowed back the "wrong test paper" that had been lingering in her throat for a long time.

Now that this guy has done the right thing, I don't need to say anything more, right? Whatever!

Final ......

Hmm, that's ......

A fine layer of sweat came out of Professor Wang's head, and his expression became serious.

Xu Yunjing watched curiously from the side, the proof of this question really didn't understand. Moreover, when she took the exam, she was abused very badly, and she didn't do it at all.

"Did you do it yourself?" Wang Zhong couldn't help asking.

In fact, he knew in his heart that the questions were all written by himself, and it was impossible to search for answers on the Internet.

"Yes." Zhang Yuan replied.

"Xu Yunjing, do you understand?"

"Huh?"

Xu Yunjing was stunned for a moment, and was suddenly called, with a messy head.

"You didn't seem to answer this question when you took the exam."

She blushed and hid for a long time before she spit out two words.

"Nope."

"Zhang Yuan, you come and tell her the idea of solving the problem."

Zhang Yuan thought for a while and said, "The L function constructed by this one has the following properties...... The natural inversion functor that classifies the sliding shadow cluster to H will be decomposed by arbitrary special uphomology theory......"

Xu Yunjing pretended to listen carefully, and at the same time looked at the little junior brother he had just met.

When it comes to mathematical thinking, there are several methods that a good mathematician will master.

The first method: If a problem is difficult and cannot be solved directly, then you can try to think about its equivalence.

As a simple example, Fermat's theorem and Taniyama Shimura's conjecture are a pair of equivalence problems. The mathematician Wiles proved the famous Fermat theorem by proving the Taniyama-Shimura conjecture.

The second way: if the problem is difficult and there is no way to find the equivalence problem, then you can also try to think about a broader problem than it.

What does that mean? Taking Fermat's theorem as an example, the "ABC conjecture" is a stronger and more generalized conjecture than Fermat's theorem. If the ABC conjecture is true, then Fermat's law is a scum, which can be proved in five sentences.

Easier said than done.

The vast majority of people do problems, but they simply do them, without understanding the profound mathematical essence of them, and not everyone can draw inferences.

Zhang Yuan explained for a long time, and Professor Wang nodded with great satisfaction, "Understand, right?" ”

Xu Yunjing was stunned and replied in a low voice: "That...... I should have understood. ”

"Do you really understand?"

Wang Zhong frowned and said slowly, "Then you repeat it again." ”

“……”

She blushed, feeling that there were 10,000 grass and mud horses passing by in her heart, and she could only stick out her tongue in great distress, "...... I don't understand it. I just got a rough idea. ”

According to Xu Yunjing's very reluctant understanding, the proof of the last question uses a very cutting-edge L function, which is equivalent to driving a bomber and suddenly dropping a nuclear bomb!

Directly blew up the topic cleanly......

It's not just this question that has been blown up into feng shui, but the same type of question, all of which have been solved at once.

This is a typical high-dimensional crushing method, full of violent beauty.

Wang Zhong frowned, knowing that the graduate student he was taking now was actually not a genius. After all, Xisha University is not the first two universities, and it is inevitable that the quality of students is poor.

"If you don't understand, forget it, no one blames you, don't pretend to understand in the future."

He turned around and said to Zhang Yuan: "It's a very good proof idea, but it's a bit of a fuss, have you read through those literatures?" The motivic-L function, which is at the forefront of mathematics. ”

Zhang Yuan said embarrassedly: "I just read some introductions, and cutting-edge mathematics is still too difficult for me to understand." But I know the nature of these functions, so I use them for granted. ”

Easy to use?

Xu Yunjing muttered in her heart: Why can't I use it easily?

Professor Wang couldn't help but smile and said, "Use the most cutting-edge mathematical theories to solve a math problem in a test paper? Can you use theorems that you don't understand? You just believe in other people's research results, what if it's wrong? ”

This is also his consistent style, anyway, he never praises people......

But in fact, my heart is full of appreciation.

What do you need for research?

It's innovation!

And not the kind of guy who does it step by step and according to the map!

How many people are very good at doing topics, and they are scum when they really engage in scientific research. Because they can only go around in circles within the rules and regulations they already have. As soon as I hear cutting-edge mathematics, there is only one reaction: I can't do it, I can't understand it, it's just heaven's book!

They don't even dare to pay attention, they don't have the spirit to explore the unknown and explore the fog!

"What you're talking about......" Zhang Yuan felt that it was indeed wrong for him to do so.

Wang Zhong's face became a little gentle, and he didn't dare to strike indiscriminately, destroying the young man's self-confidence: "To do learning, you still have to be down-to-earth." Although this cannot be miscalculated, it is not practical enough. However, it's better to make the questions than not to do them at all, so this test paper will give you 99 points. ”

Zhang Yuan nodded very knowingly and admitted his mistake: "I'm sorry, these are all courses that I studied on my own." I am deeply aware of my lack of knowledge and lack of solid foundation, so I want to go to graduate school......"

"Self-taught ......"

Wang Zhong came back to his senses, and a sentence suddenly choked in his throat.

What's the situation?

I suddenly remembered that this thing was just an undergraduate!

……