Feng Xingshen stared at the phone. He knew all those words, but when they were united together, he felt that he didn't understand what they meant.

He was dumbfounded for too long, and his heavy glasses slipped off and sat on the bridge of his nose. He stretched out a hand, dragged his glasses upward, and squinted at the phone again.

People in their 60s and 70s have obvious wrinkles on their faces, and their fingers are a little trembling. Delete the information they have written one by one, and then reply: [Are you kidding? 】

How could an 18-year-old girl prove Bartra’s conjecture?

Learn:【? 】

Study: [What is a mailbox? 】

Feng Xingshen calmed down and sent her an email, then put down the phone and waited quietly.

No hurry, no hurry.

Over the years, people have actually said that Bartra has been proved many times, but the loopholes and mistakes were discovered after the announcement. The little girl may also be mad.

He took a deep breath, and about five minutes later, Ding’s computer mailbox reminded him that he had received an email, and his phone turned on at the same time.

Study: [Sent, did you receive it? 】

Feng Xingshen asked unwillingly: [Do you know what this is that you proved? 】

Maybe she doesn't understand the meaning of this conjecture in mathematics at all.

Study: [Batra conjecture, the subject is a bit difficult. When you came to ask me, I had proved it for half a month, plus this week, it took nearly 20 days in total. 】

Feng Xingshen:? ?

Why did he hear the tone of "it took me twenty days to prove this thing" from the little girl's message?

Does she know how many people have spent all their lives without proof?

Feng Xingshen was even less hopeful about this conjecture. He replied: [Well, let me see first. 】

After replying, I downloaded more than 30 draft papers from the email, printed them out one by one, and formed a book in order, and immediately looked at the first page.

Looking at it this way, he never stopped.

-

Xue Xi waited for a while, and found that the math teacher didn't reply to her anymore. Looking at the time, there were still ten minutes before get out of class ended. She simply took out a set of Olympiad questions and decided to do it for a while.

Fan Han, who was also in the Mathematical Olympiad, watched her back.

During this time, he searched a lot about Bartra-related content, only to find that she was actually proving this problem.

Seeing her now, is she finally giving up?

After ten minutes, get out of class ends.

Fan Han packed up his books, stood beside her, and spoke earnestly: "Batra guesses that it is not something that we can touch at our age. Don't be too high-minded. You should prepare for the national league!"

Xue Xi glanced at him indifferently and said nothing.

Fan Han thought the other party had listened, and explained to her: "This time the math league is national, you can't underestimate others. Do you know that the mathematics star ranked first in the country last year? He scored 270 points in the exam. The point is, He was in the second year of high school last year! And last year, he had already won the first prize of the National League. If it wasn't for a physical problem and didn't go to the winter camp, he might have been admitted to Huazhong University. He is Li Xuekai from our province. And don’t underestimate Sun Jie. Although his math star is not as good as you, it does not mean that his performance in the competition is worse than yours."

Xue Xi felt that he was so noisy, so he picked up the books and walked out with a hug.

Fan Han was still following her, still wanting to talk, Xue Yao walked out of the physics class, and hurriedly chased him after seeing him: "Fan Han!"

Fan Han stopped, Xue Xi had already gone downstairs and walked far.

He looked at Xue Yao and thought of his behavior just now, so he showed his concern for Xue Yao as much as possible, and asked: "I heard that Teacher Zhou Zhou went to your house for an assessment this weekend? At your level, for sure. Did you succeed in apprenticeship?"

Xue Yao: "..."

Her face stiffened, and after a while, she dropped her head and smiled: "No."

Fan Han was taken aback: "Why? Everyone said that Zhou Zhou had accepted a new apprentice! It wasn't you, could it be Xue Xi...?"

Xue Yao immediately shook her head: "No, it's Xia Yiyi. I think she is so pitiful, she has never studied, and has no friends, so I gave her the opportunity."

Fan Han paused, and walked into the classroom with Xue Yao, and said with a sigh of relief: "I'll just say that Xue Xi grew up in the Orphanage, how can he play the piano..."

When Xue Yao heard this, the fingers holding the physics paper slightly hardened, but there were some things she didn't say, which made Fan Han misunderstood.

The two returned to the classroom and found that most of the others had not left.

Xue Yao and Fan Han were both taken aback.

Someone next to him with a mobile phone asked: "Fan Han, who do you think will be the first place in the country in this math league? Now Li Xuekai has the highest number of votes, followed by a person from another province. The third place is Sun Jie and the fourth place. It's Xue Xi! Do you think Xue Xi has a chance to be No. 1?"

No. 1 in the country...

This word made Xue Yao's eyes shrink, she sneered: "No. 1 in the country, where is it so easy to get! Xue Xi's time for system training is still too short, Fan Han, what do you think?"

When these words came out, Fan Han's expression was a little dazed.

There was a time when discussing mathematics competitions, the class always said whether he could get the provincial first prize, but now he has risen to the first level in the country?

He turned his head unconsciously and looked at the girls in the last row again.

She packed the books into her schoolbag properly, and then walked out carrying the heavy schoolbag...

He retracted his gaze and replied, "I find it difficult."

In this examination, the provincial first prize winners will be selected to participate in the national Olympic competition. Except for the first place, the rest are first prizes. What is the difference?

And Xue Xi was still looking at the phone frequently after he returned home, had dinner, and after finishing a few sets of questions, lying in bed.

The math teacher, why haven’t you given her a message?

Kyoto, Huaxia University, Mathematics Laboratory.

A graduate student was doing the final check, but suddenly found that the light was still on in the room of the tutor Feng Xingshen.

He subconsciously walked over, opened the door to turn off the light, and saw Tutor Feng holding the glasses in one hand, while squinting at the things on the paper.

His hands were shaking, and the whole person seemed to be in extreme excitement.

The graduate student was stunned and asked cautiously: "Teacher, why haven't you returned home?"

It's twelve o'clock in the evening! And today’s topic, it seems that you don’t need to stay up late, right?

Feng Xingshen was interrupted, and this returned to reality.

He stared at the answer in his hand in disbelief, and stood up suddenly: "Yes, that's right!"

She really solved this world problem! !

[Knowing that you can wait, so send it in advance again~ Well, do you guess Xi sister can get the first place in the National Math League? Leave a message in this chapter, select 50 people to give out book coins~ Meme! 】