In early summer in May, the sun is in the sky.

The sunlight is obscured by the trees along the sidewalk, and only specks of light are left on the ground.

But even so, people still only feel hot and dry when walking on the road. This is the summer in Star City, and Africans have to peel off their skins when they come back for summer.

At this time, a mother and son were walking on the sidewalk in the sweltering heat.

Qiao Ze, a teenager, looked blank, and his walking posture was still a little weird, while his mother Lu Xiuxiu's eyes swept over the boy from time to time, and his mouth kept chattering.

"Qiao Ze, when you meet that Teacher Yu, do you want someone to know? It's a thing that will take your whole life. Mom is useless, she can only help you with this. If you don't work this time, you may not be able to go to college, and what will you do then! ”

It's a pity that Lu Xiuxiu's chatter did not make the young man resonate in any way, and he did not respond, and his face was still unwavering.

"Hey...... You! Lu Xiuxiu wanted to say a few more words, but when she saw the child's wooden expression, she finally gave up, but her mouth was still broken and broken.

Fortunately, the hotel that carried her last hope was not far away.

……

Xiaoxiang Xingfu Hotel, room 716, Li Jiangao was leaning on the head of the bed and looking at a printed paper seriously, when the sudden ringing of the doorbell interrupted his train of thought, frowned slightly, and he put the paper on the bedside table casually and walked to the door.

"Teacher Yu, I am Qiao Ze's parent, and Teacher Zhou introduced us here."

Oh, looking for Lao Yu, it's approaching admissions season, and the admissions teachers are really busy.

"This parent, I don't ......"

Li Jiangao opened the door with a wry smile, and just wanted to explain that Lao Yu had changed rooms with him, but who thought of a woman would talk directly.

"Teacher Yu, I know this is not easy to do, but please listen to me first! So let's go in and say......"

Before she could finish speaking, the woman grabbed the hand of the young man next to her and rushed into the room......

Li Jiangao was stunned, there is no way, everyone who understands the Internet atmosphere now understands it. He subconsciously avoided physical contact with the woman in front of him, but he only dodged sideways, and the woman smoothly pulled a rather wooden-looking child into the room.

"That, parent, I'm not Teacher Yu, Teacher Yu, he lives on the 4th floor, and he is ......," Li Jiangao turned around with a wry smile and continued to explain.

However, the woman didn't seem to understand what Li Jiangao was saying, and said to herself: "Really, Mr. Yu, it's not that I'm boasting, our family Qiao Ze is really very good, he can often get full marks in mathematics and physics, but his grades in Chinese and English and some other subjects are worse."

Originally, he could have participated in the Olympiad to escort Huaqing and Yanbei, but the child was a little bored, not good at communication, excluded by the people inside, and was forced by the single coach in the school not to participate in the competition, but this year we helped him sign up for the competition in the city, and won the award, I brought all the awards, you see......"

Li Jiangao looked at the chattering woman and felt a little broken.

I knew that there would be such a difficult parent who couldn't understand people's words today, so I shouldn't have changed rooms with Lao Yu last night.

"No, this parent, I don't lie to you, I'm really not Teacher Yu. Last night......"

When Li Jiangao continued to try to make the other party understand the meaning of his words, the woman suddenly broke down and cried: "Teacher Yu, really, you are our last hope." During this time, I found all the people I could find, and the child's homeroom teacher was actually very optimistic about Qiao Ze, but the child was really too biased.

Joze's father died early, I pulled him up alone, and the doctor said that he had Asperger's syndrome, but in fact he was really not sick, he just didn't like to talk to people. Think about it, with a dull personality like him, if he can't go to a good university, what else can he do when he goes to society in the future?!

I beg you, or you will test him, as long as it is in mathematics or physics. Any difficult question is fine, the more difficult the better, if he can't do it, I'll turn around and leave! Really, our family Qiao Ze is really a genius! ”

Li Jiangao was completely stunned.

At this time, he was embarrassed to use his toes to dig out a three-bedroom apartment on the floor, and secretly prayed in his heart that this hotel had better be more soundproofed. Otherwise, the people around him couldn't hear what the woman was saying, and God knows what the professors who lived next to him would think.

But this woman is still a widow!

What the hell is this?

"Qiao Ze, you also say hello to Teacher Yu. Eh...... Don't mess with the teacher's stuff! The woman said, wiping tears from her eyes.

Only then did Li Jiangao realize that there was still someone in the room.

When he paid attention to the child, he found that the mother was no longer crying, but this Qiao Ze was still calm like an outsider, and I don't know when, this guy picked up the paper he casually threw on the bedside table, and was sitting on the sofa next to the bed, silently watching.

Li Jiangao just wanted to speak, but the young man suddenly looked up at him, and he noticed that the child's eyes were very clear, but the young man's next words made him stunned.

"Is this an article you wrote?"

Li Jiangao subconsciously shook his head and said, "No, this is Professor Ronier's latest paper at the University of Illinois. ”

"Oh! The author is quite smart......" The boy nodded and commented, but then immediately added: "But the third lemma turned out to be wrong, so the subsequent proofs are all problematic." ”

Li Jiangao was amused......

Look at what is said......

This is a paper published in the "Annals of Mathematics", which has been reviewed by a group of mathematicians, of course, the paper may have problems, but a group of reviewers of the same profession have not seen it, can this guy see it?

And this paper is still about group theory, and you can understand how obscure group theory is.

If you don't understand, you probably haven't even heard of this word.

Not to mention a high school student, he was tortured to death by the selection of topics in the direction of group theory during his doctoral stage.

But after all, Li Jiangao was just an associate professor, and he still had cultivation, so he just sneered and said, "Hehe, what's wrong, can you briefly talk about it?" ”

"It turns out to be true in three-dimensional conditions, but it is wrong to bring in four-dimensional Euclidean. If you bring in the general equation of a four-dimensional linear equation for analytical calculation, you will get a unique solution, which means that either the hyperplane ABC is 0 at the same time; Either the faces of this subspace will intersect the coordinates of the solution with this custom line. However, in 3D Euclidean geometry, ABC cannot be 0 at the same time; In four-dimensional geometry, faces and lines do not intersect. ”

Li Jiangao was stunned for a long time, then rushed over, almost snatched the paper from the child's hand, and then began to seriously re-read the proof process of lemma 3, and then looked at Qiao Ze with a strange face: "How do you know that there is a unique solution to this part of the equation?" ”

Qiao Ze pursed his lips and looked at the man in front of him, as if he was still looking at a fool, and there was a hint of disappointment, he didn't want to answer, but thinking that this was the first person who could understand what he meant, he still reluctantly gave an explanation: "Of course it's estimated." You imagine the 3D projection in the coordinate system, and then use the coordinates of each point as parameters to bring in, and then bring in the dimensional transformation calculation process. Although I didn't calculate the exact result, I can be sure that there is a solution to this equation. ”

"In short, this kind of special tightening Li Qun that the author is trying to construct is flawed!"

……