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Chapter 423 The Convergence Proof of Rich Flow!
In this world...

Some people, even though they are born with good skin and dress more glamorously, but their stomachs are full of recklessness.

And some people are not greedy for extravagance despite their plain appearance.

But there are stars and seas in the eyes, thousands of hills and valleys in the chest, and flowers like brocades in the heart, one person and one book are the whole world.

The old man guessed it was the former.

But Wei Yidong is definitely the latter.

You can laugh at his appearance, but others can also laugh at your ignorance, not a clown.

of course.

Except for the omniscient, omnipotent and perfect people like Jiangnan, after all, they are pig feet and cannot be compared.

In short.

The first time Jiang Nan saw Wei Yidong, he thought he was a good guy, holding a thick stack of draft paper in one hand, two white steamed buns in the other, and a water bottle between them.

This……

It is the man in the legend.

and so……

It's different from treating Lin Qingya who asks questions that elementary school students know so much that he dismisses them.

For Wei Yidong.

Jiang Nan is willing to help him solve his doubts.

It's worth mentioning.

This is the second time that Jiangnan has evaluated, or treated, or valued a young person [under 30 years old] in this way.

The first one should be Wang Xuan who is still on the other side of the ocean. He was the guide at Haval when he participated in the International Four Competitions.

Living abroad, thinking about Dongyun, studying hard in a different place for the rise of Dongyun technology.

It is also the kind of attitude of not forgetting the original intention and always being the only way that Jiangnan will recognize Wang Xuan so much.

So much so that when he left Da Yang, he did not hesitate to give the other party a small half of the priceless perfect graphene.

of course.

People are really awesome.

Although there is no news for several months.

However, I have sent a few messages to Jiangnan recently, and it seems that he is going back to China. It is not a disheartened return with no success, but the kind that has achieved major research results, the return of the king.

And this year.

With his major discoveries on graphene, Wang Xuan has been published in "Nature" magazine four times, creating an exclusive record that is unique in Dongyun and even in the world.

It was also rated as the top ten influential scientific figures in the world by "Nature" magazine this year, and the bullfrog is so hot.

of course.

Wang Xuan can achieve such a great achievement, naturally cannot do without the strong help of Jiangnan (ω｀).

If Jiangnan hadn't given him a part of perfect graphene, the latter would not have been able to thoroughly demonstrate the magic-angle graphene, and discovered many important properties of graphene on this basis.

It is for this reason.

Wang Xuan will continue to contact Jiangnan, and while sharing his joy with the latter, he also expresses his most sincere thanks.

only……

A busy horse in Jiangnan recently.

There has been no reply.

But it doesn't mean he doesn't pay attention to Wang Xuan.

in contrast.

He still attaches great importance to the latter.

You must know that Jiangnan is a person, if you say he is easy to get along with, he is easy to get along with, and if he is not easy to get along with, he is not easy to get along with.

Although he is not proud, most of his peers and young people are just scum in his eyes.

Only Wang Xuan is an exception.

[sp: Bai Yingying is not in this case! 】

And now...

Then there is a second one, Wei Yidong.

At the same time.

Seeing Jiangnan reaching out his hand, Wei Yidong felt overjoyed immediately, "Then...then I will disturb you, Classmate Jiang!"

Done.

He didn't pass the draft paper to Jiangnan, but spread it on the table in front of Jiangnan.

And pressed the corner with the steamed bun and water bottle in his hand, and pointed out the place that made him most puzzled.

Ah!
The heart of seeking knowledge and the attitude of being a human being are clearly revealed.

In this regard.

Jiang Nan nodded, didn't say much else, because it didn't make sense, but just looked at the questions on the paper.

This is a question about differential geometry.

exactly……

It's about 【Convergence of Ritchie flow】.

this……

Most of you must know it, right?

It doesn't matter if you don't know, after all normal people don't know, including the old man ().

Differential geometry is a branch of mathematics.

It mainly uses analytical methods to study the geometric properties of space (differential manifolds).

The branch of mathematics that applies differential calculus to study the graphic properties of curves and surfaces in three-dimensional Euclidean space originated in the 17th century almost at the same time as calculus.

The influence of differential geometry research on other branches of mathematics as well as mechanics, physics, engineering, etc. is immeasurable. Mathematicians such as Euler, Monge, Lagrange and Cauchy have all made contributions to differential geometry. important contribution.

And [Ricci flow] is an inherent geometric flow in differential geometry.

Its main idea is to deform the manifold over time.

That is to let the metric tensor change with time, and observe how the Ricci curvature changes under the deformation of the manifold, so as to study the overall topological properties.

Its core is the Hamilton-Ricci flow equation, which is a quasi-linear parabolic equation system.

Ah!
It is estimated that everyone still does not understand.

After all, this written explanation is too abstract.

Even the old man looked at it in a cloud of mist, didn't know where to go, and had a doubt of "what is the use of this thing".

But it’s easy to understand with an analogy.

"If a balloon is blown, the balloon will continue to expand. We can use [Ricci flow] to study its spatial changes, and finally get a "perfect" ideal result, and so on to [big universe expansion, small heat Expansion and contraction, many natural phenomena can be attributed to the evolution of space]. "

In short.

This 【Convergence of Ritchie flow】is very bullfrog.

If you still don't understand well.

You should know the [Poincaré Conjecture] among the seven major mathematical problems of the millennium!
It is the only one that has been proved among the seven conjectures. The prover will not only get a million dollars, but also win the Fields Award.

However, the other party dismissed this. It is said that he neither took the money nor even the Fields Award.

And [Poincare Conjecture] is a proposition with basic meaning in topology, which is solved by using [Ricci flow]. The importance of the latter can be seen from this.

Although the [Convergence of Rich Flow] researched by Wei Yidong is only one of the characteristics of Rich Flow.

If it can be researched, it will be a major development in the field of geometric analysis and geometry, which will stimulate many related researches, extend it to the study of mean curvature flow, and solve some famous conjectures, such as the continuation conjecture.

Gee!

That's definitely a bullfrog.

However, although this thing is important, it is not so difficult. I don't know how many people in the world have fallen into the sand.

And Wei Yidong began to study it at a young age, which shows the depth of his study of differential geometry.

In this regard.

Jiang Nan's eyes lit up too.

"Not bad, this question is interesting!"

"Although it is not as simple as the twin prime number conjecture, Zhou's conjecture and ABC conjecture, it is not simple."

"It can even be said to be the most in-depth question I have been asked in the past few months in the library."

"Even for me, I guess it will take some effort to solve it! ()."

"..."

Jiangnan has always been afraid of difficult questions, but he is afraid that the questions are not difficult.

The easier the less tasteless.

This is also the reason why he doesn't like to deal with people like Lin Qingya, Huaqing's former school belle recently.

And the more difficult the question, the more interested he is.

Originally, he had a good impression of Wei Yidong.

And after looking at this [Convergence of Rich Flow], I immediately have a better impression of the latter ε (greater than less than) з.

do not judge a book by it's cover.

Wei Dongyi is indeed very powerful.

This is awesome...

Not only does it mean that it has a deep research on the Rich flow, but it also means that it has almost expressed the [convergence of the Rich flow], but it is stuck at a small key point.

Jiangnan can be sure...

Even if no one gives advice, as long as Wei Yidong is given a certain amount of time, the other party can fully express it.

but……

Since people asked about their own head.

Of course he wouldn't turn a blind eye to it, and after a little thought, he gave Wei Yidong a suggestion.

That is……

"Here you can introduce the extension of the average curvature, and then prove it to the contrary, you can go back and forth!"

"What do you think, student Wei Yidong?"

"..."

(End of this chapter)