"In a week, you're going to the United States, right?" asked Yang Yiyi, who was beside Chen Zhou, tilted her head.

"Hmm. Chen Zhou nodded slightly, "The academic conference started on the 15th, and Dean Sun and I should leave the day before." ”

After a pause, Chen Zhou smiled and asked, "What gift do you want?"

Yang Yiyi tilted her head and thought about it, and said softly: "If you bring ice cream back, it will melt, right?"

Chen Zhou was stunned when he heard this, and then gently scratched Yang Yiyi's nose: "Want to eat ice cream?"

Yang Yiyi wrinkled her nose and nodded with a smile.

"Let's go. Chen Zhou simply cleaned up the things on the table and stood up.

"Hee-hee, okay. Yang Yiyi stretched and stood up.

Chen Zhou saw Yang Yiyi's posture stretching her waist, and couldn't help but think, this girl has such a good figure, is it because she loves sweets?

But why do you only grow meat where you should be fat?

Noticing Chen Zhou's eyes, Yang Yiyi reached out and put his hand on Chen Zhou's arm, and as soon as she made a effort, she heard Chen Zhou's low voice.

"Painful ......"

"Hmph!" Yang Yiyi snorted lightly, and slowly released her hand.

Walking out of the library, Chen Zhou was still rubbing his pinched arm, did he have a long time to eat sweets?

"Does it still hurt?" Seeing Chen Zhou's movements, Yang Yiyi was a little distressed.

Touching Yang Yiyi's gaze, Chen Zhou let go of the hand that rubbed his arm, grabbed Yang Yiyi's hand instead, and said with a smile: "It doesn't hurt, but it's ......"

Yang Yiyi asked suspiciously, "But what?"

Chen Zhou leaned in front of Yang Yiyi and whispered: "However, my daughter-in-law's figure is really good~"

"You, don't be ashamed ......" Yang Yiyi just wanted to make a move, but found that both hands were tightly grasped by Chen Zhou.

"Haha, you can't beat it, right?" Chen Zhou replied with a smile.

Yang Yiyi thought about it for a while, and bit Chen Zhou's arm violently.

"I'll go ......," Chen Zhou hurriedly let go and jumped away.

Glancing at Yang Yiyi, who was gearing up, Chen Zhou immediately said: "Yiyi, I was wrong......

Yang Yiyi didn't really want to fight Chen Zhou again, so many people around her were watching, she had already heard someone say: "Ah, dog food poisoning, the post on the campus network has material again......"

Yang Yiyi pulled Chen Zhou and hurriedly left.

Chen Zhou secretly thanked the surrounding students who were poisoned by dog food, and said that he must sprinkle more dog food next time.

Isn't that safe......

November 10th.

There are five days to go until the start of the MIT Mathematics Conference.

Chen Zhou received a message from Dean Zhou, which was flight information.

By the way, Dean Zhou also explained the travel arrangements.

There were a total of five people who went to the academic conference this time, in addition to Chen Zhou and Dean Sun of the School of Mathematics, there were also three professors.

The names of two of them, Chen Zhou heard for the first time.

But the other one, he had already heard of it.

Xu Chenyang, who received a Ph.D. from Princeton University, the No. 1 school in mathematics, won the National Science Fund for Distinguished Young Scholars last year, and was named Changjiang Distinguished Professor of Yenching University.

This is a genius mathematician who was once known as "Xu Shen" in Yan University.

He is also known as the elder brother of the "Three Musketeers of Yan University".

The "Three Musketeers of Yan University" refers to Yun Zhiwei, Zhang Wei, and Zhu Xinwen, all three of whom are undergraduate students of Yan University in 2000.

It's just that the current "Three Musketeers of Yan University" have all stayed in the United States to teach, and they have not chosen to return to China.

They are also known as the "golden generation" of Yanda Mathematics.

After Chen Zhou solved the hail conjecture, he also heard a lot of remarks comparing him to them.

It's just that, whether it's good or bad, Chen Zhou doesn't care very much.

So after learning that Xu Chenyang would also go with him, Chen Zhou was not surprised.

After all, there are many advantages to participating in such academic exchange opportunities.

As the leader of the new generation of Yanda, Yanda will not let go of this opportunity to cultivate talents.

But Chen Zhou has not met this "big brother" at the Yenching International Mathematical Research Center, and this time he can communicate on the road.

Although the elder brother Xu Chenyang mainly studied the field of algebraic geometry, no mathematician could refuse the charm of number theory.

After the itinerary was confirmed, Chen Zhou finally began to prepare the content of the 30-minute report.

Through the "cultivation" of the last hidden mission, Chen Zhou already knew that a real master of speech does not need a script.

Those drafts that are prepared are only reserved for those who are not prepared.

Someone like him, who has already engraved the proof of the hail conjecture in his mind, still needs a speech?

It took nearly half an hour for Chen Zhou to make a PPT and paste some core proof processes.

Well, PPT still has to be made......

After the PPT is completed, save it, copy it to the U disk, and it's over.

Chen Zhou turned his head and plunged into the world of Clamell's conjecture again.

He had a new idea about that Clamell's modified conjecture.

"If you look at Kramel's revised conjecture approximately......"

Chen Zhou made a table of numbers on scratch paper.

This table of numbers is not a list of composite numbers for the proof method of the Ertos conjecture.

It was obtained by Chen Zhou's changes on the basis of it.

After listing the number table, Chen Zhou took the pen and began to count circles.

The Kramel modified conjecture is expressed as (Pn+1≤N)max(Pn+1-Pn)≈logN(logN-loglogN)+2.

Here Chen Zhou circled the numbers that matched, (Pn+1≤N)max(Pn+1-Pn) and logN(logN-loglogN)+2.

This method is actually a bit similar to the sieve method.

Sieve method, also known as Eratosten sieve.

The specific method is to first arrange the N natural numbers in order.

1 is not a prime number, nor is it a composite number, just cross it out.

2 is a prime number, left.

Then cross out all the numbers after 2 that are divisible by 2.

The first number after 2 that is not crossed out is 3, leaving 3 behind.

Then cross out all the numbers after 3 that are divisible by 3.

By analogy, all composite numbers that do not exceed N are filtered out, leaving all prime numbers that do not exceed N.

Of course, this is just a simplistic statement.

Sieve methods are widely used, starting with the four-color theorem, to constructing an infinite number of regions connected by pairs, to the study of Goldbach's conjecture, and so on.

And the person who uses the sieving method to the extreme is Mr. Chen.

This old gentleman who advanced Goldbach's conjecture to "1+2" brought the sieve theory to its apex in the process of studying Goldbach's conjecture.

Until now, it has not been possible to go further.

Chen Zhou naturally also knows that the use of the sieve method has basically reached the extreme, and it is difficult to make a breakthrough.

But it doesn't prevent him from looking for ideas from this aspect.

"If you use the sieve formula to verify (Pn+1≤N)max(Pn+1-Pn)≈logN(logN-loglogN)+2......"

As time passed, Chen Zhou gradually frowned.

"The Clamell modified conjecture itself is a change made in approximation, and if you use a formula, it is not equal......"

"On the contrary, if you go around like this, you will go back to the Kramer conjecture itself......"

Chen Zhou put down his pen, temporarily detached himself from the research in front of him, and turned to open the literature on the computer to read.

Looking at it, his eyes suddenly lit up.