"There's only one week left, are you going to the United States?" Yang Yiyi beside Chen Zhou asked, tilting her head.

"Yes." Chen Zhou nodded lightly, "The academic conference starts on the 15th, and Dean Sun and I should leave the day before."

After a pause, Chen Zhou asked with a smile: "What gift do you want?"

Yang Yiyi tilted her head and thought for a while, then said softly: "If you bring ice cream back, will it melt?"

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, smiled and nodded.

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

"Hehe, okay." Yang Yiyi stretched and stood up.

When Chen Zhou saw Yang Yiyi stretching, he couldn't help but think, could this girl have such a good figure because she loves sweets?

But why do you only gain weight where you should be fat?

Noticing Chen Zhou's eyes, Yang Yiyi reached out and put her arm on Chen Zhou's arm. As soon as she exerted her strength, she heard Chen Zhou let out a low cry.

"It hurts, it hurts..."

"Huh!" Yang Yiyi snorted softly and slowly loosened her hand.

After walking out of the library, Chen Zhou was still rubbing his pinched arm. Does eating sweets give him strength?

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

Catching Yang Yiyi's gaze, Chen Zhou let go of the hand rubbing his arm, grabbed Yang Yiyi's hand, and said with a smile: "It doesn't hurt anymore, but..."

Yang Yiyi asked doubtfully: "But what?"

Chen Zhou came close to Yang Yiyi and said quietly: "But my wife's figure is really good~"

"You, don't be ashamed..." Yang Yiyi was about to take action, but found that both hands were tightly grasped by Chen Zhou.

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

Yang Yiyi thought for a while and then bit Chen Zhou's arm.

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

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

Yang Yiyi didn't really want to hit Chen Zhou again. There were so many people watching around here. She had already heard someone say: "Ah, the dog food is poisoned. There is material for the campus website posts again..."

Yang Yiyi took Chen Zhou and left quickly.

Chen Zhou secretly thanked the students around him who were poisoned by dog ​​food, and said that he must spread more dog food next time.

That's how safe it is...

November 10th.

There are 5 days until the start of the MIT mathematics academic 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 going to the academic conference this time. In addition to Chen Zhou and Dean Sun of the School of Mathematical Sciences, there were also three professors.

This was the first time Chen Zhou heard the names of two of them.

But he had already heard about the other one.

Xu Chenyang received a doctorate from Princeton University, the top school in mathematics, received the National Science Fund for Distinguished Young Scholars last year, and was named the Yangtze River Distinguished Professor of Yenching University.

This is a genius mathematician who was once known as "Xu Shen" at Yanda.

The senior brother who is also known as the "Three Musketeers of Yan University".

The "Three Musketeers of Yanda" refers to Yun Zhiwei, Zhang Wei and Zhu Xinwen, all three of whom were undergraduate students of Yanda in the class of 2000.

However, the current "Three Musketeers of Yan University" all stayed in the United States to teach and did not choose to return to China.

They are also known as the “golden generation” of mathematics at Yanda.

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

However, Chen Zhou didn't really care whether it was good or bad.

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

After all, there are many benefits to participating in more 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 yet met this "elder brother" at the Yanjing International Mathematics Research Center, and this time he can communicate on the road.

Although senior brother Xu Chenyang's research mainly focuses on the field of algebraic geometry, no mathematician can refuse the charm of number theory.

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

Through the "training" of the last hidden task, Chen Zhou already knew that a true master of speech does not need a manuscript.

Those prepared manuscripts are only for those who are not prepared.

Does a person like him, who has the proof of the hail conjecture engraved in his mind, still need a speech?

After spending nearly half an hour, Chen Zhou simply made a ppt and posted some core proof processes.

Well, I still have to make a ppt...

After the ppt is completed, save it, copy it to the USB flash drive, and it's over.

Chen Zhou turned around and plunged into the world of Kramer's conjecture.

Regarding Kramer's revised conjecture, he had a new idea.

"If you look at Kramer's modified conjecture approximately..."

Chen Zhou made a list of numbers on the draft paper.

This number table is not the list of composite numbers used in the proof of Erdos's conjecture.

It was obtained by Chen Zhou's changes based on it.

After listing the numbers in the table, Chen Zhou took a pen and started counting.

The expression of Kramer's modified conjecture is, (pn1≤n)max(pn1-pn)≈logn(logn-loglogn)2.

What Chen Zhou circles here are the numbers that respectively meet, (pn1≤n)max(pn1-pn) and logn(logn-loglogn)2.

This method is actually somewhat similar to the sieving method.

Sieve method, also known as the sieve of Eratosthenes.

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

1 is not a prime number or a composite number, so just cross it out.

2 is a prime number, stay.

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

The first uncrossed number after 2 is 3, so leave 3 behind.

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

By analogy, all composite numbers not exceeding n will be screened out, leaving all prime numbers not exceeding n.

Of course, this is just a simple statement.

The application of the sieve method is very wide, starting from the four-color theorem, to constructing infinitely many pairs of connected regions, to the study of Goldbach's conjecture, and so on.

The person who has applied the screening method to the extreme is Mr. Chen.

The old man who advanced Goldbach's conjecture to "12" brought the sieve method theory to its peak in the process of studying Goldbach's conjecture.

Until now, I can't go any further.

Chen Zhou naturally also knew that the application of the screening method had basically reached its extreme, and it would be difficult to make any breakthroughs.

But it does not prevent him from looking for ideas from this aspect.

"If you use the sieve method formula to verify (pn1≤n)max(pn1-pn)≈logn(logn-loglogn)2..."

As time passed, Chen Zhou gradually frowned.

"Krammel's modified conjecture itself is a change made based on approximations. If a formula is used, it is not equivalent..."

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

Chen Zhou put down his pen, temporarily broke away from the research at hand, and turned to open the literature on the computer to read.
Chapter completed!