Because he did not prepare in advance, in the face of a barrage of questions, Song Fan was speechless and couldn't answer a single question.

This also aroused the deep suspicion of the two professors, Cui Gongming and Yu Chengsui.

"Students' math is still in high school. But students are good at learning, so ......"

Song Fan was neither humble nor arrogant, and explained simply.

Unexpectedly, this explanation caused even greater misunderstanding.

"Study?" Cui Gongming interrupted Song Fan's words and snorted coldly, "Then you haven't passed the exam a few times in the past three years of high school." Is that what you call being good at learning?"

This learning is not the other's learning.

What Song Fan said did not mean what Cui Gongming understood.

Seeing this, Song Fan was silent.

And Qin Kexin, who was on the side, also showed an embarrassed look.

Song Fan's academic performance over the years, although Qin Kexin has not paid attention to it, she also knows that one is very bad.

"Although Song Fan's academic performance was not good in the past, he has made a lot of progress recently......" Qin Kexin defended Song Fan a few words.

Quite a bit of progress?

That means one is bad!

I haven't even figured out the knowledge in the textbook, and if I have learned it thoroughly, how can I talk about the Goldbach conjecture?

Cui Gongming shook his head in disappointment, got up and said:

"Young people, in the future, I would like to advise you to be down-to-earth and not to leave anything to chance. Learning doesn't happen overnight, and there's no shortcut!"

"Do it yourself!"

As he spoke, Cui Gongming brushed his sleeves and left!

I thought I was a genius who was not born in the world, but after some conversation, he was a mediocre man with a good skin and a belly full of wine bags!

Seeing his old friend leave suddenly, Yu Chengsui also smiled bitterly, shook his head and got up, and said goodbye: "I should leave too." ”

"Old Yu, I'll send you ......" Qin Kexin was embarrassed and flustered, she didn't expect it to turn out like this in the end.

"Professor Yu, these notes are given to you. Song Fan had the opportunity this time and delivered what he had prepared to Yu Lao.

Yu Chengsui was stunned, thinking to himself, what are you still giving me these things for?

"Alright then, I'll take it. Go back and check out the ......."

Yu Chengsui finally relented and was embarrassed to refuse in person. I took the note, didn't look at it, and put it in my handbag.

Seeing the two professors leave, Song Fan turned around and went back to the house.

Originally, there were still some questions, and I wanted to ask them in person, but I was interrupted by a series of questions, and I didn't say a few words in the end.

"Father. Those two old guys, speaking ill of you outside. Why are you being so polite to them?" Leng Yue said from the side.

"Don't blame them for misunderstanding. I really don't understand the questions they are talking about. I'm just learning and using. Song Fan said indifferently, "I just hope that the content of the notes I prepared just now can be of some help to them." ”

Song Fan respects the two old professors.

At the same time, he also used some of his own ways to make some small contributions to the academic community in this country.

"Elder Cui, Elder Yu, you go slowly......" Qin Kexin followed suit and sent the two old professors to the car.

"Miss Qin. Don't blame me for being too talkative, stay away from Song Fan's kid in the future. Don't be fooled by his looks!

When Cui Gongming was leaving, he didn't forget to remind Qin Kexin, worried that this simple girl would be deceived by a young man like Song Fan who didn't learn or know anything.

"Professor Cui, Song Fan is not what you said......" Qin Kexin wanted to explain a few words for Song Fan, but she didn't know where to start.

"Well, you can do it yourself. Cui Gongming shook his head, he was not his granddaughter, so he was too lazy to worry about it.

Qin Kexin sent the two professors away, feeling a little lost. I don't know if Song Fan will blame himself for being troublesome.

It's a mess today, and the result is happy on both sides.

Qin Kexin was sandwiched in the middle, which was really difficult.

"Alas...... Are you going to explain it to him?" Qin Kexin hesitated, and then walked towards Song Fan's villa.

At this time, at Song Fan's door, Che accidentally bumped into Shen Zihan and walked over here.

"Kexin!?" Shen Zihan was also stunned.

My former best friend, when we meet again today, the atmosphere is a little awkward.

"You...... Come to find Song Fan?" Shen Zihan saw where his friend was going, wasn't it Song Fan's home?

"Hmm......" Qin Kexin nodded, and quickly shook her head, afraid that Shen Zihan would misunderstand.

"Come in and talk about it......" Shen Zihan smiled generously and took the initiative to open the door and invite.

......

Disappointed, he left Song Fan's home.

Cui Gongming couldn't wait to book a return ticket. and took his old friend Yu Chengsui and accompanied him back to attend a math seminar.

"You let me run for nothing, you can also go back to Beijing with me. Cui Gongming pulled hard.

"Okay, good ......" Yu Lao was also a little guilty, and he didn't even have time to prepare for the salute, so he accompanied his old friend and boarded the plane.

Two people sit down and store their luggage.

"What are you carrying in this hand, so heavy?" Cui Gongming opened the handbag and asked curiously.

"Oh, it was given to me by Song Fan just now. I thought about throwing it in the trash, but you rushed to catch the plane in a panic, and I forgot about it......"

Yu Chengsui said, called the flight attendant, and planned to let the flight attendant throw it out together.

"Hmph, unlearned boy, what else do you want him to do? I'll see what he's scribbling again......

Cui Gongming was curious, took out a notebook casually, flipped through it, and suddenly-

Cui Gongming was stunned!

- Fermat's conjecture!

- Four-color conjecture!

- NP totally problematic!

- Poincaré conjecture!

- Riemann hypothesis!

......

In today's mathematical world, the three major conjectures, the seven major problems, and all the solution ideas have all been recorded by Song Fan in these notebooks.

Admits that Song Fan doesn't understand calculus, doesn't understand geometry, and doesn't understand all the mathematical knowledge beyond what he learned in high school.

But - Song Fan has a strong learning ability.

Be able to learn and use now, and answer now!

Just like a cow, you can accurately find the core points and solution ideas of all problems!

Due to the sudden visit of the two, Song Fan was preparing to warehouse, so these problems only gave some ideas and ideas for solving the problems.

So there is no final answer.

But—

For each problem, Song Fan gave ideas for solving the problem.

And these new ideas are like breaking new ground. It's refreshing, it's never seen before!

God said, "Let there be light!"

And so, there was light!

Cui Gongming and Yu Chengsui were holding notes, with old tears in their eyes, as if they had touched a miracle and saw the light in the darkness!

These notebooks are the light of the mathematical world!

If you want to talk about the previous one, the notes that recorded Goldbach's conjecture, can cause an earthquake in the mathematical world.

So now these five notebooks, which record the remaining nine major mathematical problems, are like the Big Bang, which can reshuffle the mathematical community!

"It's ridiculous that we just now, we laughed at Song Fan for not understanding anything......" Yu Chengsui sighed again and again, "It's us two old fools who really don't understand anything......"

"Parking...... Stop the car...... I'm going back...... I want to go back to Jiangnan!!" Cui Gongming put down his notebook abruptly and yelled loudly.

Hearing this, the surrounding passengers snickered.

"Are these two old men crazy? Crying and laughing there for a while. ”

"The planes have taken off, how can they stop and go back? Think you're in a car?"