Xu Lingchu and Li Xuan had a chat for a while, but he would not disturb Li Xuan's questions.

But because Li Xuan was the second-year class that suddenly appeared in the first year of high school, he had also been a teacher and student in the school under the national flag. He was very famous. When studying in the library, many students recognized Li Xuan and started to talk in a low voice.

"That's Li Xuan?"

"Yes, the master of mathematics... he is a day student, and he also comes to the library to study on weekends. He really works hard."

"It's him who plays the queen in the English drama Snow White. He looks so beautiful with long hair and draped shoulders. He looks very good now. He's really a boy?"

These boring classmates were whispering, but most of them were still reading quietly and came to the library on weekends, and academic masters accounted for the majority.

...

Li Xuan did not pay attention to the eyes of others, and focused on finding the method of proof of Peng Saile's theorem. He put in 99% of his efforts, but now he lacked one percent of his inspiration.

Xu Lingchu probably didn't sleep well last night. After reading the book for a while, she felt sleepy and fell asleep on the table, as peaceful as a sleeping beauty.

When Li Xuan was calculating the problem, he glanced at Lingchu, which was funny and didn't bother her.

At this moment, Yan Pengfei from the first-year high school competition group came to the library for self-study today. He noticed Li Xuan. Unexpectedly, he could see Li Xuan and walked over in great enthusiasm, "Great God?"

Li Xuan smiled at him.

Yan Pengfei was stunned for a moment. Seeing Li Xuan's beautiful facial features, he was a little fascinated by Li Xuan's smile. He remembered the queen played by Li Xuan, who was too beautiful and suddenly didn't dare to look at Li Xuan. When he saw Li Xuan calculating, he was surprised, "God, what are you?"

"I'm proving Penselley's theorem."

"Penseille theorem?"

Seeing that he was curious, Li Xuan explained the content of the theorem.

After hearing this, Yan Pengfei thought about it and found that the theorem was wonderful. He simply sat down next to Li Xuan and tried to prove it. Unfortunately, he couldn't find any idea even if he thought hard.

Li Xuan communicated with the system in his mind, "Does I have a owed IQ? Why do I feel so difficult to prove it? If I enhance my math skills, is it much easier to prove Peng Saile's theorem?"

System: [The host can enhance mathematical computing ability and logical thinking ability. It cannot guarantee that you can prove it, but it is definitely better than your current situation. In order to capture fleeting inspiration, it is also recommended that the host use a god-level buff to discover clever proof ideas.]

Li Xuan wants to do it, just replenish his brain, because an English drama performance has soared its appreciation value, and it is also a waste if you don’t need it.

Then the first feeling is that the calculation ability is improved. Many calculation processes can be directly mentally arithmetic, which can skip many unnecessary steps and save a lot of draft paper.

On the draft paper, Li Xuan drew many circles inside and outside circles, and started to prove it again.

Because the geometry proof idea cannot be found, considering the improvement of computing power, try to use the analytical geometry proof method and establish a coordinate system to calculate.

Analyzing geometry does not require too much thinking. The difficult thing is to calculate. Li Xuan turned the geometry quantity into the generation quantity and started to calculate it.

Li Xuan frowned slightly: "It's not enough, improve the computing power a little more."

System: [The computing power is already twice that of the host, do you need to improve it?]

Li Xuan looked at the appreciation value and had spent tens of thousands of dollars. It felt like a bottomless pit, so he could only forget it. The learning ability improvement exploded like an index curve. In this case, balanced development can maximize the utilization of the system.

However, the relationship between unknown quantities in this proof is complex and the calculation is very heavy and long. Even though Li Xuan felt that the calculation ability has improved a lot, it took him two hours to get this proof method out, and the calculation draft paper is a large stack.

This proof method is too stupid. It is not because of the improvement of computing power. Li Xuan will never prove this in person, and it is no different from a humanoid calculator.

In this way, Li Xuan breathed a sigh of relief after the analytical geometry proof method was completed.

On the other hand, Yan Pengfei proved for a long time without any progress. He scratched his ears and heads and gave up struggling. At this time, he saw Li Xuan stop writing and was surprised, "God, you won't prove it, right?"

Li Xuan nodded, "It's almost done, it's proven by analytical geometry."

"Lend me a look."

"Okay." Li Xuan was not so stingy and handed Yan Pengfei a stack of draft papers.

Yan Pengfei saw the draft paper and smiled, "I just want Peng Saile to prove the process, don't want anything else..."

“It’s all.”

Yan Pengfei was stunned for a moment, looking at the dozen pages of proof paper, and was stunned for a moment.

Li Xuan explained: "The calculation amount of the proof is a bit large. I have tried my best to skip the steps and reduce the use of paper."

Yan Pengfei was a little suspicious of life. He picked up the proof and saw that Li Xuan was still jumping in the proof process, but he couldn't understand it and almost burst into tears.

At this moment, the God-level curiosity buff is being turned on, and Li Xuan is not interested in chatting with others, and is still thinking about Peng Saile's theorem.

In the process of analyzing geometric proof just now, Li Xuan was inspired to have an algebraic proof idea, which can transform geometric quantities into quantities and simplify calculation quantities without building coordinate systems.

Because of the clear idea, after Li Xuan started writing, he came up with this method of algebraic proof soon.

Although this proof method is not as stupid as analytical geometry, the process is still too complicated, and the many algebraic formulas make people dizzy.

In mathematics, there are many proof methods, and Li Xuan is still considering the simplest geometric proof method.

Li Xuan communicated with the system again, "System, I want to find a geometric proof method to help me enhance the remaining appreciation values ​​of thinking logic and spatial imagination ability graph sense, and I will see if it can be proved."

The system agreed.

He understood Peng Saile's theorem more and more deeply, and Li Xuan was fully capable of his brain. He quickly thought of the geometric proof method from algebraic proof. Geometric proof also used some algebraic formulas, but it was simpler than analytical geometry, and it was done in ten pages.

A sense of accomplishment arises naturally.

Li Xuan wanted to share his joy and said to Yan Pengfei, "Yan Pengfei, do you want to see it? I have a new way to prove it."

Yan Pengfei didn't understand the method of analyzing the geometry. He was frightened and was hit hard, "Don't, forget it."

After saying that, he burst into tears and ran away.

No one shared the happiness, Li Xuan was a little sad.

Li Xuan's god-level buff ended, and Xu Lingchu also woke up in a daze. She found that she was asleep when she was reading a book, and she felt a little embarrassed.

Li Xuan looked at her confused look and suddenly said, "You are drooling when you sleep."

"Ah." Xu Lingchu blushed when she heard this and touched the corner of her mouth.

Seeing her shy look, Li Xuan was almost laughing to death, "I'm lying to you."

Xu Lingchu was stunned for a moment, unable to help but pat on Li Xuan, smiling like a flower: "...you hate it."

Because of Li Xuan's incident, when she went home in the evening, Xu Lingchu refused to hug Li Xuan when she said goodbye. After she walked away, she suddenly turned around and waved and said:

"I'm so happy to be with you, bye!"

Li Xuan curled his lips and waved his hand.

...

...

When he got home, Li Xuan wanted to find someone to help him see if there were any omissions in his three proof methods. He immediately contacted Zhao Dongming on WeChat:

"Teacher, I found three proof methods of Peng Saile's theorem. Can you help me see if there are any errors?"

After a while, Zhao Dongming saw the news from Li Xuan and replied, "Yes."

"Thank you, teacher, I'll take a photo and pass it to you."

Then Li Xuan took down the draft paper and passed it to Zhao Dongming one by one.

Zhao Dongming smiled slightly, and was quite proud at first. After all, Li Xuan took the initiative to ask him questions, but after seeing the pictures, his smile gradually disappeared. When he finally saw dozens of photos, he was completely confused.

Li Xuan finally finished posting the photos and was a little tired. He smiled and said, "That's all, it's gone, how about the teacher?"

Zhao Dongming: "..." That's all, are you serious?

What can I do? I promised myself and I had to finish watching it with tears.

After watching hard for a while, Zhao Dongming found that it was a headache. Li Xuan's steps were a bit serious. He had to think about each step, which made him cry.

Finally, he surrendered and had to accept his old age, saying, "Li Xuan, you should show it to the new math coach in the school."

Li Xuan was puzzled: "Competition coach? Teacher, is the coach who leads the competition class?"

Zhao Dongming: "Yes. A graduate student who just graduated from Peking University Mathematics School is very good at mathematics. He just came to school last week. It's normal that you haven't seen her before. I have her WeChat, so you can try it."

Li Xuan was very curious about the origin of the coach, "Teacher, who is this coach? Is it amazing?"

Zhao Dongming remembered the principal's praise for the new coach. In addition to helplessness, he also admired him, "It's very awesome. This is the graduate student the principal went to Peking University Mathematics Institute. At that time, the principal took out five final questions for her in the CMO league, saying that she could do two questions and hired her. Guess what, she picked up the pen and made four major questions on the spot in less than an hour."

A graduate student from Peking University School of Mathematics?

Li Xuan was a little surprised, but he didn't expect that the new math coach was a little bit famous.

In just a short time, you can make four final questions in the CMO league. If you go to participate in the IMO, you will definitely be a gold medal player, and the chance of full score is also very high. Of course, this is just a hypothesis. It is impossible for her to participate in the CMO at her age.

At this time, Zhao Dongming typed and said to Li Xuan again: "I'll tell her and let her agree to you add her as a friend."

...

...

Li Xuan got a friend link from Teacher Zhao Dongming and applied to add a math coach friend.

The coach’s WeChat name, I love eating ice cream, and the feeling of being childlike.

The real name is Lin Xuerui.

After a while, the other party approved Li Xuan’s friend application.

"Li Xuan, right?" She immediately sent a message.
To be continued...