Princeton, USA.

When Ning Xiao was busy in the deep city, Robert Kenny once again brushed up on a new paper signed by Ning Xiao.

The editor-in-chief of the Annals of Mathematics is actually feeling a little numb.

Although on the official website of the Annals of Mathematics, Ning Xiao's paper on the NS equation has been hanging for half a month, but so far there are not many citations, but this does not mean that this paper has caused little shock.

The reality is that Ning Xiao's paper is being widely discussed throughout the academic community.

At least as far as Robert Keney knows, there has been a lot of activity in the field of mathematics lately in the field of partial differential equations. As you can tell from the email and phone calls that the editors received, everyone was very excited.

Another world-class problem has been tackled, and it is indeed exciting.

The theoretical community doesn't care about turbulence algorithms, they pay more attention to whether the proof process itself is rigorous enough, because the scientific community believes that the conclusions are correct, but there are many problems that cannot be proven.

For example, Goldbach's conjecture.

Any even number greater than 2 can be written as the sum of two prime numbers. Even today, with the rapid development of computers, no counterexample has been found, but at the same time, no one in the mathematical community has been able to prove this conjecture through a rigorous proof process. But that does not prevent people from directly quoting this conclusion.

But at the same time, they can't ignore the practical application of turbulence algorithms.

You only need to listen to the name of the algorithm to know that the algorithm itself is based on related papers.

So everyone is very excited, but even a mathematician with a little repute will refute the correctness of this paper without hard evidence. The logical chain is clear, and the fact that the author of the paper was able to develop a turbulence algorithm is enough to show the depth of the author's research on fluids.

This is an enviable achievement.

At the same time, it also made Ning Xiao's first paper published in the "Annals of Mathematics", the paper on the sensitivity conjecture of the extradimensional cube, become overshadowed.

It's like if someone has a good point that is too prominent, it tends to make people ignore their other strengths and weaknesses. For example, Ma's father is very rich, and everyone will subconsciously ignore that he is also very good at bragging.

But after carefully reading through Ning Xiao's paper, Robert Kenny's numb emotions disappeared without a trace, and instead he wanted to buy a ticket to China immediately, find Ning Xiao, and then open Ning Xiao's brain to see how the structure inside was different from ordinary people.

Or start the academic achievement review process, check whether there is a large team of mathematicians behind the family.

Three papers, three completely different research directions!

People are working hard in one field, and most of them are constantly advancing in the same subdivision even if they are brushing papers. But Ning Xiao obviously didn't follow this path, he was like a student in high school, where the textbook goes, his thesis will be written.

In his eyes, mathematics seems to be a whole discipline, and there are no more subdivisions. The first paper is about extradimensional cubes, the second paper is about turbulence, and the third paper is directly switching to symplectic topology and Gromov-Witten theory.

What would Ning Xiao write in the fourth and fifth chapters, Robert Kenny couldn't imagine.

Is there a mathematical superman in this world?

Really, even if Ning Xiao was solving a worldwide problem related to fluids, such as accurately tracking fluid points, he would not be so surprised. However, Ning's paper proposes a new mathematical tool for the study of symplement topology and Gromov-Witten theory.

Moreover, from the point of view of the argumentation process, these mathematical tools will greatly simplify the relevant mathematical research.

If it weren't for the fact that he had already learned about Ning Xiao's life experience from Fan Zhenhua, and knew that an ordinary young man in a small town could not get top-level academic resources at all, he really wondered if this was a fraud in the signature of Chi Guoguo's article, or a signature fraud that insulted the intelligence of the editor-in-chief.

Not to mention that people named this set of mathematical tools directly in the paper Ning's segmentation method.

Putting his name in a textbook is the pursuit of every mathematician, and if this is the result of a team effort, Robert Kenny can't even figure out what kind of person would be selfless enough to give this kind of work to Ning Xiao.

So if you remove all the impossible, the rest is probably the truth.

Just when Robert Kenney's heart rose with infinite emotion, his heart suddenly moved, and he remembered a person - Dominic Duncan.

The 26-year-old mathematician, who is also young, happens to be working in symplectic geometry.

As the editor-in-chief of the Annals of Mathematics, Robert Kenny is very well informed about some information in the mathematical community.

For example, he already knew that the Norwegian mathematician was likely to win next year's Fields Medal for his work on the analysis of relationships between different scales and the connections between multiple fields of his mathematical tools.

It's almost a sure thing.

In fact, the academic community is also keen on the god-making movement, especially for the mathematical community, since the Poincaré conjecture was proven, there has been no major breakthrough for a long time. Dominic Duncan's strength lies in the fact that he is a mathematician with extensive research, and his work has been helpful in many directions of number theory.

The most important thing is age, at 26 years old this year, if nothing else, when he wins the award next June, he will be a year younger than the youngest Fields Medal winner, Syris Ponte, and will break the new record for the youngest Fields Medal, which can be exciting.

But there are always so many coincidences in the real world, and accidents arise whenever people think that nothing will happen.

Although the birth of Ning Xiao will not affect Dominic Duncan winning the award next year, the youngest Fields Medal winner has variables. After all, this young man from Huaxia will only be twenty years old next year.

To be honest, Robert Kenny actually didn't want Ning Xiao to win the award so early from the bottom of his heart, and even this represents the voice of many people.

Because Ning Xiao is too young.

If Ning Xiao wins the Fields Medal next year, the youngest Fields Medal winner will be refreshed to 20 years old, which also means that for a long time, and perhaps even during the existence of the Fields Medal, the possibility of continuing to break this record on this basis is almost completely lost.

An otherwise excellent gimmick was just tossed alive, but after all, this is only the idea of some people. The lack of gimmicks is obviously more important than the credibility of the awards.

The breaking point of thinking of Dominic Duncan is that he and Ning Xiao are both very likely to win the Fields Medal next year, and both are winners who have broken the Fields Medal age record.

If Dominic Duncan were to be the reviewer of Ning Xiao's paper, he might even make a good story in the world of mathematics.

The duel of geniuses of the century has always been a pleasing episode.

If the two have the opportunity to review each other's manuscripts, the comments given by each other will also become valuable information.

Thinking of this, Robert Caeney directly picked up the phone on the desk and called Dominiel Duncan, now the young mathematician is a professor at Harvard, and the two have a good personal relationship, in fact, the editor-in-chief of the "Annals of Mathematics" has a good relationship with many great mathematicians.

Of course, this is also due to the profession, and if you have a good relationship with the great mathematicians, you will also be thought of when you submit. As for mathematicians in general, the situation can be reversed, and the phone is quickly connected, and Dominic Duncan's voice is followed: "Robert, it seems like you haven't contacted me for a long time." ”

"Yes, it's been a busy time lately, you know."

"Huh...... Well, what's the matter? ”

"There are indeed some things, you should already know that Ning in Huaxia, right?"

This question made the other side silent for a long time before he spoke: "Of course, the actual situation is that his name has almost made my ears calloused during this time, and in fact I am reading his paper. But if you're calling like those boring people and want to ask what I think of him, I'll probably put you on the blacklist. No, not possibly, but definitely. ”

Robert Kenifey struggled to hold back his laughter.

There is really no shortage of people in this world who don't think it's big and like to stir up trouble, and there are quite a lot of such people, even in academia.

"No, no, Duncan, you should know I'm not that boring. Of course, if you need a psychological massage, maybe I can recommend it for you...... Well, it's actually because that Ning submitted another paper, and I hope to invite you to be a reviewer for this paper. ”

"He submitted another paper?!

”

The tone on the other side was surprised......

After all, Ning Xiao's paper on the NS equation has only been published for half a month, and he has produced this level of results in the mathematical community, so he has to revise it for a while, waiting for a protracted debate with the academic community, such as replying to various inquiries and discussions emails every day, and accepting various invitations to give lectures......

How is it possible to continue to submit papers?

Of course, this is Dominic Duncan who doesn't know much about Ning Xiao.

Although Ning Xiao has indeed received a lot of emails from his mailbox every day that he wants to have academic discussions with Ning Xiao, and there are indeed many invitations, he has never opened them. Even some of the requests relayed by Fan Zhenhua were decisively rejected by him.

But then again, this paper was unplanned.

If it weren't for Professor Fang's topic, neither Ning Xiao nor March would have thought of sorting out a paper specifically for a subdivision of mathematical methods.

"Well, that's not all, it's the same level he's always had." Robert Kenny stimulated the other side again.

In a sense, in fact, the editor-in-chief also likes to watch the excitement.

Not to mention the clash of ideas between geniuses, which is especially exciting.

"But you know, Robert, I don't have a lot of research on partial differential equations, fluids. Are you sure you're looking for me to be a reviewer? ”

"No, no, no, his new paper is about Xin Geometry. More precisely, he pioneered a set of mathematical methods for cutting high-dimensional complex structures, which he called Ning's segmentation. I've just finished reading this paper, and if it works, his approach makes the process easier and more intuitive for people to study related problems. ”

Again, the introduction caused a long silence on the other side of the phone.

"Robert, today is not April Fool's Day."

"In fact, when I first found this paper in the submission system, I thought it was a joke, but I just read the whole article."

"That'...... All right. Since you recommend it, I think you should really look at the paper first. ”

"Then pay attention to the mailbox, Duncan, and I'll send you the invitation link."

"Okay, I'm looking forward to it."

……

Dominit Duncan, who hung up the phone, opened the mailbox, and a minute later, the invitation link had been sent to the mailbox. Click on the link, select agree, and then go to the paper download page.

Unlike many older professors who like to print out papers and read hard copies, Dominette prefers to read them directly on his computer. In fact, it is easier to use a computer than to use a pen and paper to mark the points that confuse him or need to be understood. Before the paper was formally reviewed, the young mathematics professor had mixed feelings.

If you compare Dominit Duncan's life experience with Ning Xiao, you will find that the two have completely different lives.

Dominit was born in Oslo, Norway, the home of the Nobel Peace Prize, the capital and largest city of Norway, and home to the Norwegian royal family. Its status is roughly equivalent to the capital of China.

His family is one of Norway's most typical middle-class families, and in fact there is a lot of middle class in Norway, a wealthy Nordic country. Because of the extremely high taxes, it is difficult for people to get rich, and at the same time, high taxes bring all kinds of high-welfare social policies.

In addition to the Nordic countries are small enough.

The area of Norway is probably about the same as that of the provinces in the south of China, and one-third of the area is in the Arctic Circle. For example, it can provide lifelong free education for all people, as well as high-quality free medical care for all.

In this kind of advantageous living environment, people often do not have much sense of distress.

But what sets Dominette apart from other Norwegians is that he belongs to the kind of hard-working force with talent.

The comfortable life is not challenging, he likes to compete with others since he was a child, but in the Nordic countries, where most of the physical strength is strong, his physical fitness seems to be very weak. Although he likes almost all competitive sports, he has been beaten by his peers since elementary school.

This once made Dominit feel depressed, and she only felt that life was full of frustrations.

It wasn't until he grew up that Dominite was exposed to higher mathematical knowledge, and learned that in addition to those competitive sports, there were also intellectual competitions in this world, such as the Mathematical Olympiad......

So he finally found his talent, and used his IQ to beat the simple-minded guys around him, although for a long time, it didn't make him seem cool among his classmates. But he finally found his strengths.

Since then, Dominite has been developing in the direction of mathematicians.

After graduating from high school, he could have applied directly to universities in Norway, such as the University of Oslo and the Norwegian University of Science and Technology, which would have been easier, and his parents also preferred Dominit to stay here.

But Dominette found it too unchallenging to stay in Norway and applied to Imperial College London in the UK. However, during his days in the UK, he felt that Britain was still not enough to study, and the pace of life was not much faster than that of Norway, so he went to Berkeley in the United States after graduating from Imperial College.

Here he finally found the feeling of the volume.

With first-class universities and high tuition fees, I feel sorry for myself if I don't study hard.

In particular, the "promotion or departure" management system used by most well-known universities in the United States for professors simply makes Dominit feel like he has come to heaven. This is using the system to force everyone to roll together.

If you want to go up, you have to have results, and if you want to achieve results, you have to work hard, otherwise you have to be thrown into the work process and fall on the streets.

Since then, Dominit Duncan has made up his mind to stay in American colleges and universities, working his way up from lecturer to professor. As a result, he became a gifted professor at Harvard at the age of 26 and was nominated for a Fields Medal. Under normal circumstances, as long as he doesn't go crazy and do some messy things, such as blowing up a certain school building, he can basically work at Harvard until he retires.

For a normal person, it would probably be only a matter of pride to have such a result at such a young age, but Dominit Duncan is obviously not a normal person. After all, human nature is supposed to be content with pleasure, and there are really not many people who can treat rolls as a hobby.

Yes, in the year before she was about to achieve the most glorious achievement of her life, Dominit only felt bored. There are not many people who can accompany him to continue in this industry. It seems that he can only set his goal on leaving a name in history.

In fact, he had been thinking about it a few days ago, and he wanted to officially start challenging the problem that is at the top of the list of millennial problems - the NP complete problem.

After all, this is one of the most difficult and important problems in the direction of number theory at this stage. If he can really solve this problem, his achievements in mathematics will probably be comparable to Newton's, and he will become the most brilliant mathematician of the 21st century in the eyes of posterity.

Of course, it is necessary to be cautious in making this decision, and generally speaking, once this kind of mathematical pit is really trapped, it is not impossible even if there is no achievement in a lifetime. Especially for a person like Dominite, who has been strong in his life, he will definitely not be willing to accept this kind of failure. However, before he could make up his mind, Ning Xiao's paper on the NS equation in the Annals of Mathematics made his brain, which already felt invincible, a little clearer.

Ning Xiao is too young, not yet 20 years old.

This is the hardest hit to Dominit. Even if Ning Xiao was a man in his thirties, he would not feel collapsed by this volume king, after all, as long as he was older than him, he would theoretically still have the possibility of catching up.

It's nothing more than achieving the same thing at the same age...... As long as you dare to roll, anything is possible.

But Ning Xiao was a full six years younger than him, which meant that his twenty years old would never be able to catch up with Ning Xiao's achievements at the age of twenty.

Fortunately, after a short period of frustration, Dominit soon found the direction of his efforts, and at the age of twenty, he was already destined to be unable to roll, so he could only roll up his lifelong achievements. This is also the reason why although he has never dabbled in the direction of fluid mechanics, he still has to download Ning Xiao's paper.

He wanted to understand Ning Xiao's thinking when solving mathematical problems, and knew that he could not be defeated in a hundred battles.

Who would have thought that the next day he would receive a call from Robert Kenny, inviting him to review Ning Xiao's new paper, which was strongly related to his research direction.

Instantly made him interested, a young man who excelled in many mathematical research directions?

He didn't believe it!

There must be loopholes in the paper!

After all, there are rules in this world...... It is impossible to allow such a powerful person to exist!

……

Unbeknownst to him, Robert Kenny had helped him find a very special reviewer.

In fact, even if he knew, he wouldn't care.

He is actually different from Dominit Duncan, if he had a choice, he would rather choose a more comfortable life than choose to go crazy involution. It's just that God didn't give him this condition.

Dominit probably couldn't understand that feeling at all.

Some people roll to enjoy life, and some people roll just to survive.

At this time, it was already ten in the morning, and everyone else had already gone to rest, only he sat silently outside Ding Yulin's room thinking about his thoughts.

The sudden death of his mother still has an impact on a nineteen-year-old young man.

For Ning Xiao specifically, the emotions are more complicated.

He hated Luo Yufang, but he never thought that he would face this kind of problem one day.

Not to mention that he suddenly has a younger sister.

An hour ago, when he said goodbye to Ge Dongshu, he asked the promising president to help him understand Ding Yulin's situation.

Although he is related by blood, Ding Yulin is still too strange to Ning Xiao, and he is not good at dealing with girls, even if this person is his own sister. This made Ning Xiao feel complicated, even more complicated than solving a math puzzle.

Half an hour ago, Ning's father called, and after understanding the situation, he hoped that he could take Ding Yulin to the capital as soon as possible.

But Ning Xiao felt that he should know more before making a decision.

I really can't blame Ning Xiao for being cold-blooded, the main reason is that he doesn't have much confidence in the opposite sex.

Since he was a child, there are very few people of the opposite sex who make him feel warm, except for his cousin Ning Xiao, there are almost none. And for a family, the most important harmony requires the joint efforts of everyone. Now Ning Xiao can not care about material costs, but he cares a lot about emotional costs.

The most important thing is that he doesn't want his old father who hasn't enjoyed a few days of happiness to start worrying again because of an extra sister.

……

The Godon tree maintained high efficiency.

Before Ding Yulin got up, Ning Xiao received another WeChat message from Ge Dongshu.

Very straightforward and intuitive.

There are about a dozen photos, which contain Ding Yulin's test scores from elementary school to junior high school and the comments of previous teachers.

I have to say that Ge Dongshu does have too many reliable friends.

After all, it's only seven o'clock in the morning, and it's not yet time to go to work on weekdays, let alone summer vacation now. Fortunately, the price has been paid, and Ning Xiao can also see it with peace of mind and see facial twitches.

This test result made Ning Xiao start to doubt the paternity test results that came out in the early morning.

How difficult can the final exam questions be in the first year of junior high school?

Especially in junior high school math, there are options and fill-in-the-blanks......

Ning Xiao felt that even if he casually blinded the multiple-choice questions and wrote all the fill-in-the-blank questions as 1 or 0, he would definitely have more than 22 points.

Even if it's a pig......

Forget it, sister, dear...... He didn't want to scold his own father.

For a moment, Ning Xiao even hoped that Shencheng's junior high school math used Olympiad test questions, and it had to be all big questions......

Yes, after glancing at the recent report card, Ning Xiao regretted very much that he asked Ge Dongshu to find these materials.

Fortunately, the teacher's comments are still decent.

Lively and cheerful personality, able to unite classmates, helpful ......

As for those who suggest that they should change their reading villain books in class, talking in class, passing notes in class, and sleeping in self-study...... 's problem was directly skipped by Ning Xiao. These suggestions are of little value, after all, students who can get this kind of score are probably doing everything in class, but it is normal that they will not be able to study.

It was the comments given by the head teacher of the primary school during the summer vacation of the sixth grade that made Ning Xiao feel a little emotional.

"Through talking with children and observing their daily performance, it is found that parents have too little company for their children, so it is recommended to increase the frequency of children's daily communication, have the courage to express love to children, and give more companionship and care to ensure the healthy growth of children's body and mind."

Probably because I'm going to graduate anyway, and I'm not afraid that the parents will complain, or the teacher is about to retire?

Well, even if there are such and such problems, Ning Xiao still feels that Ding Yulin himself must have a problem. Because since he was in elementary school, Lao Ning didn't take much care of him at home, let alone have too much communication and companionship, after all, Lao Ning had to make money to support his family.

But he never gave up on himself, in fact, because of this, he will be more diligent and self-conscious, because he has to do better to get more attention and care from the teacher.

So after roughly browsing these contents, Ning Xiao put down his mobile phone, and after all, he still had to talk to this little girl in person.

didn't let him wait long, almost as soon as he put the phone in his pocket, the door of the room was pushed open, the little girl rubbed her eyes and walked out, when she saw Ning Xiao sitting on the sofa, the whole person was stunned, and the hand that was still rubbing her eyes forgot to put it down.

The two looked at each other silently.

After about two minutes, Ning Xiao finally overcame the psychological barrier and spoke first: "Have you slept well?" ”

"Hmm." Ding Yulin nodded.

"Then go wash up first, I'll have someone bring breakfast, and then we'll talk." Ning Xiao said.

"Oh."

Ding Yulin weakly agreed, and Ning Xiao picked up the landline on the table next to him.

……

Ten minutes later, the two sat face to face at the table in the living room of the room, and in front of each of them placed a breakfast that had just been delivered to the door by the waiter.

Ding Yulin poked aimlessly at the plate with a fast child, occasionally raised his head to peek at Ning Xiao, and then quickly lowered his head, picked up a little food and sent it to his mouth. As usual, Ning Xiao was eating and thinking about how to carry out this conversation between strange brothers and sisters.

"I just read your transcript......"

As soon as Ning Xiao spoke, Ding Yulin's fair face suddenly turned red, and his head was buried even lower.

After hesitating for a moment, Ning Xiao still adjusted the wording: "The results don't seem to be very ideal. ”

"Hmmm......"

"Why? Don't like to study? ”

"I want to sleep when I read a book, especially a math book." Ding Yulin replied in the subtle voice of a mosquito.

"Oh."

Ning Xiao nodded, and then asked, "Then have you thought about it later?" What do you want to do? ”

Ding Yulin raised his head, glanced at Ning Xiao blankly, lowered his head quickly, and then shook it.

"But you have to think about it now, I lost my mother when I was six years old, and from then on, I would get up every day and ask myself, what will I do when my dad is old and can't do it anymore." Ning Xiao stated calmly.

Ding Yulin's eyes turned red instantly, and his eyes were filled with mist......

"Before today, you could be willful, you could feel that the whole world was sorry for you, and you could even give up on yourself. Because no matter what, someone will pay for your willfulness. After today, if you still have the same attitude towards life as before, it will be very troublesome. Because when the world really decides to be sorry for you, you don't have the slightest room to resist. ”

When he said this, the darkest moment of his life flashed in Ning Xiao's mind, and his eyes when he looked at the girl became sharper.

Ding Yulin hung his head and continued to remain silent, but tears began to slide down his cheeks, drop by drop, onto the carpet in the room.

Ning Xiao continued: "So start thinking now, and then tell me, what are your plans?" ”

"I ...... I...... I will study hard in the future, and then when I graduate, I will find a job and support myself. ”

"Are you sure you're going to study hard?"

"Yes...... Yes. ”

"Then start this summer vacation and start with the basics. I'll find you a tutor. After the summer vacation, my requirement for you is that your grades in each subject are at least the level of an ordinary junior high school student, and this is the only thing I can do for you now. You have to understand the most basic rules of this world, and if you want to get anything, you must first know how to give. ”

"I ...... What if I can't learn? ”

"What I ask of you is just a grade that anyone with a normal IQ can achieve, and there is no question of whether you can't learn. If you can't meet this standard, then you should think about how sincere your promise is. ”

Ning Xiao's tone was very heavy, and his expression was also very serious.

He doesn't know how to comfort people, nor does he know how to deal with the complex emotional line in front of him, but he mechanically fulfills the responsibility of a blood brother.

"I don't actually like to talk, and I've talked a lot for you today. I want you to take the future into your own hands. Because that's how I've lived since I was a kid. I've been through some bad things and understand that feeling of helplessness. Fortunately, when I was most helpless, my family did not give up on me, but stood behind me unconditionally. ”

Speaking of this, Ning Xiao's tone became more subdued and more serious: "But the premise of all this is that the efforts I have been working since I was a child make them believe in me. So they gave me the greatest support and encouragement, both mentally and materially, regardless of the reason. In the same way, if you want to get the same support, first of all, you have to show me your dedication, your attitude to live seriously, and your determination to be responsible for yourself. ”

Looking at the girl who had been sobbing silently on the other side, Ning Xiao wanted to slow down his tone, but when the words came out, they became harder: "Ding Yulin, please remember that this world has never been fair, we are just children of ordinary people, even if we want to get as many resources as others, we have to do our best, not to mention your current situation." 13 years old is not a reason to escape, weakness is. But the irony is that the world has always been especially the weak. ”

After speaking, Ning Xiao paused, and reluctantly raised his voice: "Understood?" ”

The little girl was so frightened by the last sentence that she stopped sobbing: "Ah...... Got it. ”

"Okay, now finish breakfast, I need to take a break. Someone will bring you your textbook in about half an hour, and you will be in your room reading during my break. Next, I will stay in the deep city to help you get the rest of the matter that needs to be dealt with here. Then take you to the capital and arrange for you to go to a boarding cram school, and then it's up to you. Dad would love to see you, but I haven't agreed yet, I have to see if you're responsible enough for yourself. ”

……

Ning Xiao stayed in the deep city for three days, and quickly handled everything.

Originally, it would have taken longer, but with the help of Ge Dongshu, those big things were quickly dealt with, and the procedures became less cumbersome.

As for other trivial matters, Ning Xiao left it to Ge Dongshu to handle it on his behalf.

What made Ning Xiao relieved was that in the past few days of contact, Ding Yulin was not as stubborn as he imagined.

But after getting off the plane, he still did what he said before, and did not let Ding Yulin go to meet the old man at home, but directly sent him to a summer tutoring institution in the capital that Ning Xiao had never heard of.

According to Lao Chen, the principal of this institution is Lao Chen's former classmate, although outsiders have heard little, but it is full of in-service teachers from famous schools who are teaching in a small circle.

According to Chen Yonggang, the principal of the training institution refused to accept Ding Yulin's results after reading them, and his face was useless, after all, he was afraid of smashing the signboard. still told people that this was Ning Xiao's sister, and they reluctantly accepted it. Of course, you have to arrange a special tutor for the little girl.

Chen Yonggang's words probably wanted to express how famous Ning Xiao is now, but obviously Ning Xiao was not happy when he heard it.

Of course, this is also because Chen Yonggang doesn't know that Ding Yulin is Ning Xiao's own sister, and he only thinks that it is the child of Ning Xiao's relatives, which kind of thing is very common. Ning Xiao didn't tell Chen Yonggang very clearly.

Just sent Ding Yulin directly to the cram school, although his sister, who was not very familiar with him, had no complaints, but Lao Ning seemed a little anxious.

When the two of them sat on the road near the community again, Lao Ning looked at the photo of Ding Yulin in Ning Xiao's mobile phone, and sighed at his son non-stop.

"Hey...... Tell me, what is this called! ”

"It's a good thing."

"Where's the good? Where's the good! At least bring it back and let me see the baby first! ”

"You've been spoiled, and you're going to continue to get used to it?"

"When did I say I was going to get used to her?"

"I am old and have a woman, and my heart is still soft, I don't feel at ease."

"I'm not at ease if you send it directly to school!"

"Oh, so you're going to tutor her homework? 22 in math, heh......"

Lao Ning suddenly stopped talking.

I could only silently scroll back and forth at the two photos on my phone.

The son is older and has a future, but he can't fight.

For a moment, Lao Ning even felt that it was not good for his son to be too promising...... It's so disobedient.

"Look at this girl, how handsome, just like you, her eyes and ears are like me, and when she grows up in a few years, she will definitely be no worse than Ning Xiao, and she is as rare as she is attractive."

"Then you have to have a good character of your cousin, Guangjun can be used as food? And my cousin at least took the junior college exam. ”

"Ning Xiao, do you have to go against me today?"

"Just keep you awake, spoiling it will only be bad for her."

"Nonsense, I don't know how to educate children better than you?"

"Are you sure?"

Facing Ning Xiao's clear eyes, Lao Ning was suddenly not so sure.

"Then she can always bring her back after cram school for me to see, right?"

"I'll make a decision to see how her grades improve."

Lao Ning snorted and handed the phone back to Ning Xiao, stood up from the side of the road, patted his butt and said, "I don't want to pay attention to you, I'll go back." ”

"Oh, I'll go back too. By the way, you don't want to ask someone where she is tutoring, go to see her secretly, I have specially greeted people who know the situation, and I will definitely not tell you. Even if you find out and let me know that you are going to see her, I will send her out of the capital. ”

"You ......"

Lao Ning raised his hand, pointed at Ning Xiao tremblingly, and put it down after a while: "You send me the girl's photo on WeChat." ”

"This one does."

"I thank you!"

"Dad, you're welcome."

"Get out!"

"Good!"

……

After appeasing Lao Ning's restless heart, Ning Xiao finally breathed a sigh of relief in his heart.

Before Ding Yulin showed him a completely changed attitude towards life, he really didn't plan to let her meet Lao Ning.

Because Lao Ning really doesn't understand education.

Although he didn't understand it, he at least knew that it would be impossible for Ding Yulin to continue like this.

At the same time, there are people who don't know that they are no longer good......

……

Cambridge, Massachusetts, USA.

While Ning Xiao was busy running errands, Dominit Duncan had locked herself in her room for four whole days.

He went to review Ning Xiao's paper with a provocative mentality, but obviously he didn't succeed.

In fact, the argumentation process of the paper is very clear, the steps are very detailed, and it is completely contrary to the style of the great mathematician Fermat, this paper is not afraid of wasting manuscript paper at all, giving Dominit the feeling that the author of the paper treats the reviewer as a primary school student.

This made Dominit very unhappy.

After directly researching the paper and finding no problems, he began to find another way.

As long as he makes a mistake in using this mathematical method to solve the relevant problem, it will naturally prove that this method is not applicable.

After more than ten hours of continuous work, Dominit was surprised to find that after using Ning Xiao's mathematical method, the problems that had plagued him for a long time had indeed become much simpler. More importantly, using the Ning's partition method to prove or calculate, the results obtained by most of the problems are consistent with the results of the previous one......

And those that are consistent are problems that have been verified by many parties.

What is inconsistent is the issue that is still controversial.

The most terrifying thing is that he seems to have used the method in Ning Xiao's paper to solve a problem that has been bothering him for a long time, and his mathematical intuition tells him that the solution process is right!

For a time, a strong sense of frustration drowned Dominit......