Chapter 22

After reviewing the first few questions, Professor Wang Zhong glanced at Zhang Yuan and slowly said, "the writing is pretty good, very neat. Unlike some people who use more computers and can't even write words, it's like a dog crawling. "

Standing aside, Xu Yunjing blushed and said it shouldn't be her?

can't!

It must be someone else.

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.

Look again, the questions with medium difficulty are also answered correctly.

It proved to be good, but the idea is a little strange, which is a little different from the normal way

In short, it is correct.

Wang Zhong took a long breath and looked up at Zhang Yuan. His anger slowly disappeared.

Take a closer look, the young man is actually quite good-looking and handsome. He is a bit like his father when he was young.

More than thirty years ago, the days and nights that teachers and students fought together have passed for a long time, and it seems close at hand.

How time flies!

Old people are always a little nostalgic. After reviewing the test paper, he thought to himself that since these questions have been done correctly and the young man's level is still a little, he won't investigate whether you have taken the back door.

500000 people, it is impossible that everyone is a natural saint. After all, there are some habits left on the earth, which can only be corrected slowly in the future.

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

Keep looking down.

Eh, those difficult roads behind

That's right!

Good, good!

These questions, even some smarter students, may not be right.

Wang Zhongban's face began to melt, which was a symbol of his mood beginning to improve.

It's the wrong guy. At this level, there's no need to go through the back door. An astronaut's exam is not easy.

Seeing Professor Wang's relaxed expression, Xu Yunjing also breathed a sigh of relief, lingered in her throat for a long time, and swallowed it again.

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

Finally

Well, this

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

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

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

In fact, he knew that the questions were all his own, and it was impossible to find the answers online.

"Yes." Zhang Yuan replied.

"Xu Yunjing, do you understand?"

"Ah?"

Xu Yunjing was stunned. She was suddenly called and her head was messy.

"You didn't seem to have answered this question during the exam."

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

"No."

"Zhang Yuan, tell her about the way to solve the problem."

Zhang Yuan thought for a moment and said, "this constructed l function has the following properties... The category of sliding projective cluster to the natural inverse functor of h will be decomposed by any special cohomology theory..."

Xu Yunjing pretended to listen carefully and looked at the little younger martial brother he had just met.

When it comes to mathematical thinking, excellent mathematicians will master several methods.

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

For a simple example, Fermat's theorem and Gu shanzhicun's conjecture are a pair of equivalence problems. The mathematician wiles proved the famous Fermat's theorem by proving the Gushan Zhicun conjecture.

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

What do you mean? Take Fermat's theorem for example, "ABC conjecture" is a conjecture stronger and more generalized than Fermat's theorem. If ABC conjecture is true, Fermat's law is a slag, which can be proved in five sentences.

Easier said than done.

The vast majority of people only do simple problems, without penetrating into the profound mathematical essence. Drawing inferences from one instance, not everyone can.

Zhang Yuan explained for a long time. Professor Wang was very satisfied and said, "do you understand?"

Xu Yunjing was stunned and whispered, "that... Should understand."

"Really understand?"

Wang Zhong frowned and said slowly, "then repeat it again."

“……”

She blushed and felt that ten thousand grass and mud in her heart crossed the road. She could only spit out her tongue in great distress, "... I don't understand. Just got a general idea. "

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

Blow up the problem directly

Not only was this problem blasted into Feng Shui, but the same type of problems were solved at one time.

This is a typical high-dimensional rolling way, full of the beauty of violence.

Wang Zhong frowned and knew that the graduate student he was taking was not a genius. Xisha university is not the first two universities after all, and the poor quality of students is inevitable.

"Even if you don't understand, no one will blame you. Don't pretend to understand in the future."

He turned back and said to Zhang Yuan, "it's a good idea to prove, but it's a bit of a fuss. Have you read through those documents? Kinetic-l function, this is the most cutting-edge mathematics. "

Zhang Yuan said shyly, "I just read some introduction. Frontier mathematics is still too difficult for me to understand. But I know the properties of these functions, so I used them easily. "

Handy?

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

Professor Wang couldn't help laughing and said, "use the most cutting-edge mathematical theory to solve a mathematical problem in an examination paper? Can I use theorems I don't understand? You just trust 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 does scientific research need?

It's innovation!

Not the kind of guy who goes step by step!

How many people are good at doing problems, and really doing scientific research is a slag. Because they can only circle within the existing rules. When I heard about cutting-edge mathematics, there was only one response: I can't do it, I can't understand it, it's a Book of heaven!

They don't even dare to pay attention. They don't explore the unknown and explore the essence of fog!

"What you said is..." Zhang Yuan felt that he was really wrong.

Wang Zhong's face became a little gentle and did not dare to strike indiscriminately, which undermined the young man's self-confidence: "you should be more practical in learning. Although this can not be miscalculated, it is not practical enough. However, it's better to work out the questions than not, so I'll give you 99 points on this test paper. "

Zhang Yuanfei nodded with common sense and admitted his mistake: "sorry, these are my self-taught courses. I deeply understand my lack of knowledge and lack of solid foundation, so I want to go to graduate school... "

"Self study..."

Wang Zhong regained his consciousness and suddenly choked in his throat.

What happened?

Suddenly remember, this product is only an undergraduate!

……