Feng Shiingshen stared at his phone, he obviously knew those words, but when they were united, he felt that he couldn't understand what they meant.

He was stunned for too long, and his heavy glasses slipped off and rested on the bridge of his nose. He reached out a hand, dragged his glasses up, and squinted at his phone again.

A man in his sixties and seventies, with obvious wrinkles on his face, and his fingers trembling a little, deleted the information he had written one by one, and then replied: [Are you kidding? 】

How could an eighteen-year-old girl prove Batra's conjecture?

Learning: [? 】

Learning: What is a mailbox? 】

Feng Shiingshen calmed down for a while, sent her an email, and then put down his phone and waited quietly.

No hurry, no hurry.

Over the years, in fact, many times someone has said that Batra has been proven, but after it was announced, loopholes and errors were discovered, and the little girl may also be fried.

He took a deep breath, and about five minutes later, the "ding" computer mailbox indicated that he had received an email, and his mobile phone also lit up at the same time.

Study: [Sent it, did you receive it?] 】

Feng Xingshen asked unwillingly: [Do you know, what are you proving? 】

Perhaps she simply didn't understand the significance of this conjecture in the mathematical world.

Study: [Batra guesses, the question is a bit difficult, when you came to ask me, I had already proved it for half a month, plus this week, it took a total of nearly twenty days. 】

Chern Shiingshen: ??

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

Does she know how many people have spent a lifetime, and they haven't proved it!

Feng Shiingshen suddenly lost hope for this conjecture, and he replied to the message: [Well, I'll take a look first. 】

After replying, I downloaded more than 30 pieces of scratch paper from the email, printed them out one by one, and made them into a book in order, and immediately looked at the first page.

When he saw it, he never stopped.

-

Xue Xi waited for a while, and found that the math teacher did not reply to her messages, looking at the time, there were still ten minutes before class ended, she simply pulled out a set of Olympiad questions and decided to brush it for a while.

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

During this time, he searched a lot about Batra, only to find out that she was actually proving this puzzle.

Looking at her now, she finally gave up, right?

Ten minutes later, class ends.

Fan Han packed up the books, stood next to her, and opened his mouth in a serious voice: "Batra guess is not something that can be touched at our age, don't be too good and ambitious, you should prepare for the national league in a down-to-earth manner!" ”

Xue Xi glanced at him indifferently and didn't speak.

Fan Han thought that the other party had listened to it, and explained to her: "This time the math league is national, you can't underestimate others." Did you know last year's number one national place in the Math Star? He scored 270 points, and the point is, he was a sophomore in high school last year! And he had already won the first prize in the national league last year, if it wasn't for his physical problems and he didn't go to the winter camp, he might have been admitted to Huazhong University by now, he is Li Xuekai from our province. And don't underestimate Sun Jie, although his math star is not as good as you, it doesn't mean that his results in the competition are worse than yours. ”

Xue Xi felt that he was so noisy, so he sped up his actions to pack up his books and walked out with his arms in his arms.

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

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

He looked at Xue Yao at this time, thinking that he was a little weak in his behavior just now, so he tried his best to show concern for Xue Yao, and asked, "I heard that this weekend, Teacher Zhou Zhou went to your house for an assessment?" At your level, you must have succeeded in apprenticeship, right? ”

Xue Yao: "............"

Her face froze, and after half a sound, she lowered her head and smiled, "No." ”

Fan Han was stunned: "How come?" Everyone said that Zhou Zhou had accepted a new apprentice! It's not you, is it Xue Xi......? ”

Xue Yao suddenly shook his head: "No, it's Xia Yiyi." I thought she was so pitiful, she never went to school, and she didn't have any friends, so I gave her the opportunity. ”

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

When Xue Yao heard this, her fingers holding the physics scroll were slightly forced, but there were some words, she didn't say, so it was okay for Fan Han to misunderstand it so much.

The two returned to the classroom to find that most of the rest had not left.

Xue Yao and Fan Han were both slightly stunned.

Someone next to him came with a mobile phone and asked: "Fan Han, who do you think will be the first place in the country in this mathematics league?" Now Li Xuekai has the highest number of votes, and then a person from other provinces, the third place is Sun Jie, and the fourth place is Xue Xi! Do you think Xue Xi has a chance to hit the first? ”

No. 1 in the country......

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

As soon as these words came out, he saw that Fan Han's expression was a little dazed.

Once upon a time, when discussing mathematics competitions, the class was always talking about whether he could win the provincial first prize, but now it has risen to the level of winning the first place in the country?

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

She stuffed the books into her schoolbag in an orderly manner, and then walked out with the heavy schoolbag......

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

In this examination, the winners of the provincial first prize will be drawn to participate in the national Olympiad, except for the first place, the rest are the first prize, what is the difference?

And Xue Xi was still looking at his mobile phone frequently after lying on the bed until he returned home, had dinner, finished a few sets of questions, and lay on the bed.

Why haven't you messaged her back yet, who teaches math?

Kyoto, Huaxia University, Mathematics Laboratory.

A graduate student was doing a final check-up when he suddenly found that the light was still on in his supervisor's room.

He subconsciously walked over, pushed open the door and was about to turn off the light, when he saw Tutor Feng holding his glasses in one hand and looking hard at the things on the paper.

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

The graduate student was stunned and asked cautiously, "Teacher, why haven't you gone home yet?" ”

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

Feng was interrupted, and only then did he return to reality.

He stared at the answer in his hand in disbelief and stood up suddenly: "Yes, yes!" ”

She really solves the world's problems!!

[I know you can wait, so I sent it in advance again~ Well, do you guess Sister Xi can win the first place in the National Mathematics League? ] Leave a message under this chapter, select 50 people to give away book coins~ Mo Da! 】