The end of technology.

"Well, it's pretty good, but will the makeup affect the performance of the fight?"

"Ning Xueshen, are you planning to write a paper on this issue?"

"Can consider it."

"..."

After the two chatted a few words on WeChat, the car had already arrived at the gate of the attached middle school.

In fact, Ning Zi doesn't talk so much on weekdays, but she thought very intimately that meeting Ning Xiao and Ning Yulin today is also a meeting with family members. Knowing that Lu Xiaoya might be a little nervous, she also behaved more than usual. A little more chatty.

This is true.

When the car came to a complete stop, Ning Zi noticed Lu Xiaoya who never paid much attention to her grooming, and even looked at her own image through the glass of the car window.

"Sister." Ning Zi opened the car window and saw three people waiting at the school gate, then opened the window and waved.

Soon the three of them came to the front of the car, and Ning Yulin, who was walking in the front with her schoolbag on her back, saw Lu Xiaoya sitting next to Ning Zi first, and immediately said: "Wow, there is such a beautiful young lady." what."

Then before the smiling Lu Xiaoya could speak, Ning Yulin said again: "Brother, I want to sit with Miss Sister."

"Okay, let your brother sit in front." Lu Xiaoya echoed.

Ning Yu glanced at Ning Yulin, then at Ge Dongshu who had gotten out of the car window to greet Fang Xu and Ning Xiao, and said to Ning Yulin, "Then give way first."

Then stood up and changed seats.

After the tossing in the car was over, Ge Dongshu on the other side finished the simple exchange of greetings with Ning Xiao and Fang Xu, and then Ning Xiao glanced inside the car, and when his eyes fell on Lu Xiaoya, he was obviously stunned, and then looked at the car. Ning Zi, who was sitting in the middle of the car and looking at her, smiled.

"Sister, you sit in the back too, let's sit together and let Professor Fang and Brother go talk about business."

"Okay." Ning Xiao agreed, and then sat at the end, while Fang Xu followed Ning Xiao and sat next to Ning Zi.

Soon the voices of the two women behind him entered Ning Zi's ears.

"Cousin, hello."

"Hello, you are Xiaoya, right? Ning Zi told me about you. I planned to take Yulin to the University of Physical Education last Saturday. I should be able to meet you. Who knows that Yulin's school weekend I couldn't make it to the event I arranged, and Zhou Tian was delayed by other things, so I finally saw you today."

"Sister Xiaoya, in fact, it wasn't my brother who told us about you first. I saw it online first. I read online that you have been in love for a long time. Is it true?"

"No, it's all nonsense online, really."

"By the way, sister Xiaoya, it is said on the Internet that you learn martial arts? Is it true?"

"Well, I have learned Sanda and Kickboxing, do you want to learn?"

"Yes I do!"

"Then I will teach you when I have time..."

……

Well, Ning Zi decided to filter out the chattering voices behind her, so she looked at Fang Xu, the brother-in-law-to-be who seemed a little cautious beside her.Speaking of which, it was the first time the two of them met him together.

Ning Zi asked casually: "Professor Fang, did my cousin take you to see my uncle the day before yesterday?"

Fang Xu nodded and said, "Well, your dad has gone too. He planned to call you, but he knew you were busy, so he didn't call you."

Ning Zi took a look at Fang Xu, and had to say that this math professor was so lucky, he was the chosen one.He asked casually: "Well, my sister has never brought anyone else home. When are you going to get the certificate?"

"Um, what Ning Xiao means is that this summer vacation, I will take her back to meet my parents, and then bring them to the capital to meet your uncle and the others, and then talk about this matter." Fang Xu replied honestly.

Ning Zi nodded slightly, this is indeed Ning Xiao's style.

"I remember your dad is a professor at Jinling University, right?"

"Well, I teach mechanics. But he's retired. He got married late back then and was already in his 30s when he gave birth to me." Fang Xu replied.

Ning Zi felt that this should have a common language with his uncle. After all, Ning Jian used to be a manufacturer of machinery, and the tractors produced by the Ningjia Village Agricultural Machinery Factory were also regarded as a well-known advantageous industry in the county.

Ning Zi asked, "By the way, have you decided on a research topic recently?"

Fang Xu shook his head and said: "Not yet. However, Liu Chenming contacted me when he was going to the mathematician conference, hoping that I could work with him on the direction of differential k-theory and localized formulas with η invariants. Let's discuss briefly For a moment, I think that there may be a localization formula under the action of the group. After searching the information, I found that no one has proposed this research, and I am considering whether to cooperate with him to try to do this project.”

"Who is Liu Chenming?" Ning Zi asked.

"Eh...you don't know?" Fang Xu was a little surprised.

Ning Zi shook her head.

"It can be regarded as an internationally renowned Chinese mathematician. He is currently a tenured professor at the Faculty of Mathematics of the University of Paris." Fang Xu introduced.

"Oh, actually, I'm not very familiar with the mathematics circle. When I need to use some literature, I look up the information directly and rarely pay attention to the author. You know, my papers rarely cite other people's articles, so I don't know the name very well. Sensitive." Ning Zi replied.

Fang Xu didn't know how to answer this sentence, so he could only smile.

Ning Zi asked again: "How do you think about it?"

Fang Xu thought for a moment before saying: "Well, I think differential K theory is still a relatively small area of ​​mathematical research at present, but if I can really find a class of operators that can be described by symplectic geometry, I think it is also very interesting." Meaningful, so he hesitated."

Ning Zi said: "Well, if you are hesitant, don't do this. Let's do Siegel's zero-point conjecture together. Try to solve this problem in one or two days."

"Ah..." Fang Xu was stunned again.

Of course Fang Xu knew what Ning Zi's zero-point conjecture was.

In fact, this difficult problem in the direction of analytic number theory is closely related to one of the most important mathematical conjectures in the world, the Riemann Hypothesis, which can be understood as a weak form of the Riemann Hypothesis.Although it is not as famous as the Riemann conjecture, many mathematicians believe that it is not simpler than the conjecture of the original Riemann zeta function to completely solve the zero point problem.

If the two can really solve this problem thoroughly, they will basically be able to win another Fields Medal.

The simplest description of this problem is that when Riemann proposed that the non-trivial zeros of the function ζ(s) were all at Re(s)=1/2+Bi.Among them, the real part is naturally the 1/2 line, and the imaginary part is not specified, so the 1/2 line on the real part becomes the critical line in the mouth of mathematicians.

But many years have passed. Although countless mathematicians believe that Riemann's judgment is correct, nearly two centuries have passed, and no one can prove this.For example, the university scholar Hilbert once highly praised the Riemann conjecture.

Although it has not been proved thoroughly, mathematicians have begun to study this proposition.For example, start to calculate whether the zero point is on this line.Although Riemann proposed this hypothesis back then, he himself did not perform the calculation, because the entire calculation process was indeed extremely complicated at that time.

In the last century, many mathematicians calculated thousands of zero points, all of which were within the line predicted by Riemann.

When computers appeared, mathematicians calculated [-] million zeros, without exception.But at this time, mathematicians found that the computing power was not enough, so the IBM laboratory also launched a ZetaGrid project, specifically providing a software for all users with computers in the world. Download this software, and the computer will automatically help mathematicians to perform calculations to find the zero point when it is idle.

At that time, more than 1 computers around the world were sacrificed to this project, and it took more than three years to calculate nearly one trillion zero points, all of which were still on the line predicted by Riemann without exception.However, the project was canceled three years later, because in 2003, the academic community came to a generally accepted conclusion after rigorous proofs that the first ten trillion zeros were all on the critical line predicted by Riemann, and the project lost its original meaning.

So the Riemann Hypothesis is still unprovable.

But it could not be proved, so mathematicians began to think of ways to expand the Riemann conjecture, so there was a generalized Riemann conjecture.To put it simply, a molecule 1 in the original Riemann ζ function is replaced by a Dirichlet function X(n), and then a new L function——L(Xs) is obtained, and this new function is considered extraordinary The zero points are also on the critical line of 1/2.

However, in the last century, mathematicians discovered that the zero points in the generalized Riemann conjecture may also appear on the line with a real part of 1. The mathematical language expression is that some zero points s of L(Xs) satisfy Re(s)≈1.

This is the Landau Siegel zero-point conjecture.

If this conjecture can be proved, it will prove that the generalized Riemann conjecture is wrong.

If this conjecture can be proved or denied, it will prove that the generalized Riemann conjecture still follows the definition of the Riemann conjecture.

Although the Clay Institute of Mathematics did not include this problem into the seven major mathematical problems of the millennium, if it can be solved, its proof ideas will undoubtedly provide effective tools and ideas for mathematicians to thoroughly prove the Riemann Hypothesis.

Now that Ning Zi suddenly asked him to solve this problem together, Fang Xu's greatest feeling was probably flattered.

He is only 33 years old this year. If this problem can be solved in one or two years... So is Ning Zi trying to push him to the podium of the Fields Medal?

Although he was very excited, he really didn't think that rushing into this field would be of much help to Ning Zi, so he couldn't help but be stunned for a while and said, "Ning Zi, are you sure you want to cooperate with me on this subject?"

Ning Zi nodded and replied: "Well, that's the decision. You, me, and Dominite will do this project. I will send you some materials later. You should study it first. As for that Liu Chenming , just decline it directly."

Fang Xu nodded in a daze, and subconsciously turned his head to look at Ning Xiao who was talking and laughing with Lu Xiaoya.

Well, let's do a project with two young Fields Medal winners...

Because the Fields Medal of Mathematics has an age limit of 40 years, and it is judged only once in four years, no mathematician has ever won two Fields Medals in Mathematics.But Ning Zi and Dominite are both young enough. If the three of them can really break through this subject, maybe both Ning Zi and Dominite may win two Fields Medals in Mathematics.

Of course, if everyone can solve the Riemann conjecture by the way...

Forget it, Fang Xu didn't dare to think about it anymore.

If you think about it too much, you will feel that this kind of top mathematics award has become less valuable. After all, the worst thing Ning Zi did at the academic level before was probably writing papers on top journals.Now he feels that Ning Zi also has the potential to win top awards like papers.

"Well, I will try my best to get into the state as soon as possible." In the end, Fang Xu could only promise so seriously.

The biggest opportunity in life is right in front of you, and even if you suspect that you will be given soft food, you are really powerless to refuse it.

……

Amidst Fang Xu's mixed emotions, the car stopped at the entrance of an alley in the capital.

A group of people got out of the car under Ge Dongshu's warm greeting, then followed Ge Dongshu into the intercommunication, and came to an antique courtyard entrance, but unlike ordinary restaurants, there is no signboard and the door is closed.Ge Dongshu first confirmed the house number, and then stepped forward to knock on the door with the knocker.

"Wait a minute, come on."

Soon there was a knock at the door in the yard, and then a young man opened the door.

"Hello, I'm Ge Dongshu. I have made an appointment with Master Su, and I've booked box No. [-]."

"Oh, Mr. Ge, please come in, please come in, to tell you the truth, everyone is lucky today, my master went to the back kitchen to cook your meal in person today." The young man greeted warmly.

"You're welcome, you're welcome." Ge Dongshu replied, then turned around and made a gesture of invitation.

Ning Zi walked into the courtyard under the greeting of Ge Dongshu, and could feel that although the small courtyard was not too big, only more than 50 square meters, it was still very delicately arranged.

In the far left corner, a small vegetable field of about three square meters was opened, and some shallots were planted. In the center of the yard, a small pond was dug, with fish swimming in it. A small bridge was built on the pond, leading to the small pavilion in the center.

However, they didn't stay outside for long, and the young man directly took the three of them into a small box in the side room.

Although the box is not big, there is also a round table that can accommodate ten people.However, it was obvious that the box had already been cleaned up, and the extra chairs and tableware had been taken away, leaving only a place.

"Everyone, please take a seat. By the way, Mr. Ge, do you want any drinks?" The young man asked politely.

Ge Dongshu glanced at Fang Xu and Ning Yu, seeing that they were shaking their heads, he said with a smile: "You don't need the wine, what special drinks are there?"

"If you don't drink, then I suggest not to drink. How about a bowl of original rice milk for each person?"

"can."

"Then I told Master to serve the food? You know, this food has to be eaten while it is hot to have the taste."

"Okay, let's serve food, I happen to be hungry."

"Okay!" The young man agreed and left the box.

Ning Yulin, who had held back for a long time, immediately asked, "Uncle Ge, isn't this a restaurant? Why is the door closed during meal time?"

Ge Dongshu said with a wry smile: "Actually, I don't know, but I think it's because people don't worry about no one coming to eat, right? In fact, it's my first time here, and I know that a greedy friend asked me to help. That’s how I found out about this place.”

Ning Zi was a little surprised and said, "It's your first time here too?"

Ge Dongshu nodded and said: "But don't worry, the taste of the food here, in the words of my friend, if you don't eat here once, your life will be in vain."

Hearing that Ge Dongshu started admiring this restaurant again, it would be a lie to say that he was not curious, but fortunately, he didn't make them wait long, and the young man had already gone and returned and brought the first dish: "Guest officers Today, according to Mr. Ge's instructions, the main dish is the popular Hunan cuisine banquet in Nanhu, and the first Hunan-style Zuan tofu, please taste it."

The voice fell, and the general tofu was placed on the table.

I have to say that although the ingredients don't sound very expensive, the presentation is indeed very delicate, and the portion is quite impressive.Ning Zi could tell at a glance that it was exactly 12 yuan, and it looked like two slices per person for six people.

But are you sure this is Hunan cuisine?

Ning Zi glanced at Ning Xiao subconsciously, and her cousin made a face at him.

Obviously, this touched the knowledge blind spot of both of them at the same time.

But how should I put it, the tofu looks light and smooth, and the soup is still steaming after being poured on it not long ago. It has an extremely delicious taste, and it gets into the nose, and it makes people's index fingers move before they enter the mouth.

Yes, just the smell of this dish already made Ning Zi believe Ge Dongshu's words.

Lu Xiaoya and Ning Yulin, who were sitting on the left and right sides of him respectively, were bobbing their noses, especially Ning Yulin, who exclaimed when the food just came out: "It smells so good!"

"Come, come, everyone is using their chopsticks. I heard that there is no need to wait for the dishes here, and they will lose their taste when they are cold. Today, we are all from our own family, so don't be polite." Ge Dongshu greeted road.

The tofu in Ning Zi's bowl was made by Lu Xiaoya for him...

Although classmate Xiaoya gave him the first piece of tofu first, the speed was not too slow. Before Ning Zi moved her chopsticks, the girl had already stuffed the whole piece of tofu into her mouth: "Wow, it's really good!" Eat, it's so delicious that it makes me want to cry. You Nanhu still has such delicious food? Am I too ignorant? Why have I never heard of it?"

"Yeah, brother, I haven't eaten it before, is this really tofu?"

Ning Zi didn't answer, because he just put the tofu in his mouth, and then he probably understood why the two foodies around him were so excited.

It was also the first time for him to experience the feeling of this fresh fragrance exploding directly in his mouth...

The soup poured on the tofu was already fresh enough, but the moment the tofu was crushed, a more mellow fresh fragrance began to germinate and spread in the mouth.The taste is extremely complex, because this tofu seems to be more full and dense than the usual tofu, but the taste is so elegant, with only layers of fresh fragrance, it feels like the taste buds are sublimated...

Really, after eating it, Ning Zi also wondered, is this really tofu?

But when Ning Zi finished tasting, the plate with 12 yuan tofu just now was empty...

In fact, Ge Dongshu and Fang Xu both put down their chopsticks after tasting a piece, so the situation is probably that, after each of the three men tasted a piece of tofu, the plate was already empty.

But this is actually normal, after all, there is a little loli who is growing up at the banquet, and a lady who is practicing martial arts.

Ning Zi didn't care about these things, but found that what Ge Dongshu said before was really no exaggeration...