At this time, Da Shi stepped forward and said: "Brother Pang, the time is almost up, Zhuang Yan needs to rest now, let's go first!" ”

Pang Xuelin turned his head to Li Yao and said, "Sister, it's not convenient for me to stay in the hospital all the time, and I will work hard for you and Brother Wang in the next two days." ”

Li Yao said: "Don't worry, I will take good care of Zhuang Yan!" “

Pang Xuelin nodded, turned around and followed Shi Qiang out of the hospital.

As soon as I walked to the gate of the hospital, I saw a heavy Hongqi bulletproof car parked at the door.

Pang Xuelin was stunned for a moment, and Shi Qiang said, "Brother Pang, I'm here to pick you up, get in the car." ”

Pang Xuelin looked around, in addition to this red flag, there were several black off-road vehicles, all of which looked particularly thick.

In addition, several police cars were parked at the intersection ahead, and traffic police were directing traffic.

Pang Xuelin followed Dashi into the car, and soon, the car started and drove towards the west of Beijing.

Several other cars also quickly followed, one after the other, protecting Pang Xuelin's red flag in the middle.

Pang Xuelin was curious: "Dashi, where is my new residence?" ”

Da Shi said: "Xishan Villa, the security over there is very tight, and it is difficult for ETO to penetrate it. In addition, if you want to visit Zhuang Yan in the hospital, we will transfer her to the intensive care unit of Hospital 301, which will also facilitate your visit. ”

Pang Xuelin nodded, a wry smile appeared on his face, his treatment is almost equivalent to the level of a national leader.

The next responsibility to resist on my shoulders is probably not small.

The Xishan villa area is very quiet, and there are full-time nannies and guards inside and outside the villa, who are responsible for taking care of Pang Xuelin's living and safety.

After eating, in the bedroom of Xishan Villa, Pang Xuelin took a bath, then lay on the bed, and said in his heart: "System, return!" ”

In the next second, Pang Xuelin opened his eyes again, and what appeared in front of him was his teacher's apartment at Jiangcheng University.

Pang Xuelin turned over and looked at his phone, at 00:15 on September 6th, he remembered that the time when he entered the three-body world was almost 0:00 on September 5th, that is to say, he had spent nearly four months in the three-body world, but only fifteen minutes had passed in the real world.

It's amazing!

Pang Xuelin thought about it, and hurriedly reached out to pull open his right collar, and there was no scar left by the gunshot wound in it.

Pang Xuelin thought about it, does this mean that when he crosses the major planes, even if he is seriously injured and dying, it will not have any impact on himself in reality.

"System, I want to take a look at the flying blade material!"

In the next second, an alloy box appeared out of thin air in the living room.

Pang Xuelin got off the bed, opened the alloy box, and what appeared in his eyes were two silver-white sheets, and in the middle of the sheet material, there was no trace of the filamentous flying blade material.

Pang Xuelin was slightly stunned, and said in confusion: "System, is there no filamentous flying blade material?" ”

The system said: "The filamentous flying blade material is only one-tenth of the thickness of a human hair, and it is difficult to distinguish it with the naked eye, so it can only be connected to the flaky flying blade material, if the host wants to see it, you can pick up the flaky flying blade material, and between these two flying blade materials, there is a filament thirty meters long." The host can try to shine a light and observe it closely. “

Pang Xuelin hurriedly picked up his mobile phone, turned on the flashlight, and then picked up one of the flying blade materials, and found that at the lower end of the material, there was a small bulge.

"This should be the place where the filamentous blade material is connected!"

Pang Xuelin shone the light through, and faintly, a trace of reflection appeared in mid-air, which was extremely weak, and it seemed to be there with the naked eye.

Pang Xuelin cautiously stretched out his hand, and faintly felt a slight itching sensation coming from his palm.

"This thing is too dangerous, let's put it away first!"

Pang Xuelin withdrew his hand, pondered for a moment, put the flying blade material into the gold box, closed and locked it, and then retracted the system space.

After not feeling sleepy for a while, Pang Xuelin thought about it, he sat down in front of the computer, opened the blank Word document, and wrote a line title: "A Proof Method for the BSD Conjecture".

As soon as he entered the working state, Pang Xuelin had no concept of time.

In the more than three months in the three-body world, Pang Xuelin has thoroughly studied the proof process of the BSD conjecture, and he can deduce the proof process of this conjecture with his eyes closed.

Therefore, it only took more than five hours for Pang Xuelin to complete the process of inputting more than 60 pages of proof.

Subsequently, he checked it, converted the word document into a PDF document, uploaded the preprint to the arXiv.org, and sent another copy to Tao Zhexuan.

He then sent the manuscript directly to the Annals of Mathematics mailbox.

Although it doesn't matter which of the four top journals in mathematics you vote for, I have published a paper related to the BSD conjecture in the Annals of Mathematics before, and this paper is naturally more suitable for the Annals of Mathematics.

As for whether it can be successfully published, Pang Xuelin didn't think about it that much at all.

If it is an honor for a mathematician to publish a paper in the top four journals of mathematics, then it is also an honor for the top four journals to publish a proof paper on the seven difficult problems of the millennium.

If the four top journals knew that the BSD conjecture had been proved by Pang Xuelin, they would probably quarrel over which journal to publish it in.

Therefore, Pang Xuelin does not have any psychological burden.

After doing these things, Pang Xuelin yawned and went to bed directly.

Even if a conjecture of this level has been proven, it will take a long time to test whether it is correct or not.

So, next, just be patient.

……

University of California, Los Angeles, USA.

In the office, Tao Zhexuan has just published a new blog, preparing to turn off the computer and go home from work to pick up the children.

Ding Dong –

The system prompted him that he had a new email, and the sender was none other than his protégé Pang Xuelin.

Tao Zhexuan was slightly stunned, he was deeply impressed by his own student.

During his graduate studies, both his talent and hard work were almost not inferior to his own back then.

Tao Zhexuan even asserted that as long as Pang Xuelin continued to do so, there was an 80 percent chance that he would win the Fields Medal before the age of 30.

The only problem is that this child is more stubborn and admits death.

At the beginning, Pang Xuelin was obsessed with the BSD conjecture and made a bet with himself, saying that he would solve the BSD conjecture within three years.

Then he plunged headlong into the big pit of BSD's conjecture.

One year after graduating from his Ph.D., Pang Xuelin published a "Proof of the André-Oort Conjecture of Polarized Abelian Clusters" in the Annals of Mathematics, but there is still a long way to go before the BSD conjecture is truly overcome.

He originally wanted to find time to persuade Pang Xuelin to consider focusing on other topics, but before he could say it, Pang Xuelin chose to return to China.

"Pang sent me an email at this time, what is this for?"

Tao Zhexuan frowned and clicked on the mailbox.

The moment he saw the email title, Tao Zhexuan subconsciously looked at the date on his phone and muttered to himself: "Today is not April Fool's Day, what kind of joke is this kid!" ”

Tao Zhexuan is very aware of the difficulty of proving the BSD conjecture, and when he chatted with Pang Xuelin three months ago, he already felt that Pang Xuelin had come to an end in the proof of the BSD conjecture.

If you want to prove the BSD conjecture, you have to create a completely new mathematical tool, or go the other way.

No matter which one you choose, it means that you spend countless time and energy, and if you succeed, you will become the great master of the founding sect, and if you fail, it means that years of hard work will be wasted.

But in any case, three months to solve the BSD conjecture is an April Fool's joke!

After hesitating for a moment, Tao Zhexuan still downloaded the PDF file in the email, opened it and read it carefully.

After all, Pang Xuelin is his own student, and if it turns out that there is really a problem, he must help him point it out.

As soon as he opened the PDF file and looked at it for a while, Tao Zhexuan's brows furrowed tightly: "The same remainder problem?" ”

This kid actually adopts a completely different proof idea from the current popular in mathematics!

"It's kind of interesting!"

Tao Zhexuan continued to read.

Time passed minute by minute, and Tao Zhexuan kept sliding the mouse.

The first page, no problem......

The second page, no problem......

Page 3, Page 4, Page 5......

I don't know how long later, the phone rang suddenly, Tao Zhexuan subconsciously picked up the phone and pressed the answer button, and his wife Laura's voice came from the other end of the phone: "Tao, did you forget to pick up the child?" ”

Tao Zhexuan was startled, looked at the time in the lower right corner of the computer, and unknowingly, he watched it for more than two hours.

He hurriedly said: "Honey, I'm sorry I forgot, there is something temporary at school today, you go and pick up the child, I may have to go home later." ”

"Well, dear, remember not too late, I'll leave you dinner!"

"Okay, that's it for now, bye-bye."

"Bye-bye!"

Hanging up the phone, Tao Zhexuan looked at the number of pages of the paper, he had read more than 30 pages, these more than 30 pages, Tao Zhexuan did not feel that there was any problem.

You must know that Tao Zhexuan has always been good at mental arithmetic and quick calculation, and has a natural intuition for mathematical problems, if he feels that there is no problem after reading it, then this article is probably not a big problem.

And the proof of this article is a different way, after Tao Zhexuan read it, there was a faint feeling of enlightenment.

"Could it be that this kid really solved the BSD conjecture?"

Tao Zhexuan was a little incredible.

Next, Tao Zhexuan spent nearly three hours reading all the BSD conjecture proof papers.

Then, he breathed a long sigh of relief, this paper actually gave him a sense of enlightenment on the problem of BSD conjecture proof.

This feeling is only possible if a proposition is correct.

Tao Zhexuan pondered for a moment, took out his mobile phone, and dialed another great god in Princeton: "Pierre, I think the question of BSD's conjecture may have a result!" ”