Of course, Zhou Chen's paper is not over here, you must know that the inside of the Kerr black hole is not a singularity, but an odd ring, which is an intrinsic singularity, the curvature of space-time is infinite, and it cannot be eliminated by coordinate conversion. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

When the position r+ of the outer event horizon and the position r- of the inner horizon are both equal to the black hole field source mass M, the Kerr black hole becomes the extreme Kerr black hole, if the angular momentum J of the black hole is increased at this time to make it rotate faster, then the square of the angular momentum a per unit mass will be greater than the square of the field source mass M, the unidirectional membrane region of the black hole will disappear, and the odd ring will be exposed.

What Zhou Chen is doing now is to prove from a mathematical point of view that when the position of the outer horizon r+ is equal to the position of the inner horizon r- is equal to the mass of the field source M, there is a limit to the angular momentum J of the black hole itself, and it is not allowed to give it additional angular momentum J.

In this way, the square of the angular momentum a per unit mass cannot be greater than the square of the mass M of the field source.

As Zhou Chen said in his graduation defense, "The rotation speed of the extreme Kerr black hole cannot be increased endlessly, it has a premise, when the rotation speed increases to a certain extent, it will not increase again, so the horizon will not disappear, and the odd ring will not be exposed to the outside......"

So this limit value is very important!

With the substitution of the new formula, there is no doubt that Zhou Chen has reconstructed the system of black holes, so that all the difficulties in front of him instantly become extremely pale. Like a giant bulldozer, it easily pushed up a small dirt bag that tried to block its way.

"OK, proof done!"

When Zhou Chen finished translating the last sentence, he glanced at the paper and made sure that the process of proof was accurate and that there were no problems with English grammar.

……

An office in the northeast corner of the School of Physical Sciences of USTC, which is the office of Professor Liang Zhiyuan, Vice Dean.

The office is not too big, and like many scientific researchers, the space of more than a dozen square meters is crammed with books of all sizes, most of which are of course related to astrophysics, and occasionally you can find some poetry and anthologies.

Next to the desk, Professor Liang Zhiyuan's desk is also full of books, but the books here are more booklets like notebooks for record-keeping. Neatly stacked on top of each other, red or green labels extend out, and with the scratch paper spread out on the table, it looks cluttered but not cluttered at a glance.

There are also a few potted plants not far away, and the refreshing and neat bamboos stand up heroically, which is pleasing to the eye.

At this time, two people were sitting in the office, talking happily and laughing.

"I said Lao Yang, your disciple named Zhou Chen is still relatively strong, it's been so many days, and I haven't asked you to answer your questions?"

As the vice president of the School of Physical Sciences, Liang Zhiyuan has always been relatively kind, and has been sitting from a grassroots researcher to the vice president for decades, and at the same time, the research on celestial bodies has been leading the domestic academic circles, as if he has achieved a lot of grace.

Yang Hexin and Liang Zhiyuan have been friends for decades, and their favorite thing is to visit this office on weekdays, whether it is academic research or leisure time. At this time, hearing Liang Zhiyuan's doubts, he naturally knew what this old friend was thinking in his heart.

He shook his head, also looking confused.

"I also think it's strange, although Xiao Chen's child is a piece of beautiful jade that can be carved, but he still owes a lot of grinding when it comes to fire. This time, the subject we gave him was obviously beyond his ability, and even if he gave it to the top astrophysicists in China, he might not be able to solve it, but he was able to calm down and didn't come to us for advice for so many days. ”

Liang Zhiyuan smiled: "Today's young people have determination!" ”

"Don't be stuck there because you can't write your paper, and you feel embarrassed to look for us." Yang Hexin also laughed and joked.

People have a cliff and learn endlessly, in the boundless knowledge, everyone will encounter some setbacks, but some people are gifted and have strong learning ability, and some people are poor in talent and weak in learning, and the wind and rain and bottlenecks encountered are different.

But everyone will encounter difficulties, whether they can break through this shackle is not only a matter of a person's ability, but also a test of this person's mentality and his attitude towards things.

Some talents are eight buckets tall and live in flowers and applause all their lives, but when they encounter a real dilemma that cannot be broken through, all the foundations established before may collapse instantly, and they will fall into the confusion of self and cannot extricate themselves; There are also some people, he may not have particularly outstanding achievements, and he has been running behind others all his life, but he is very resilient to solve one problem after another that plagues him, these problems may come from academics, or from life, when he is old, he suddenly finds that the person who originally ran in front of him is gone, and he has become a leader.

This is the realistic version of "seeing him rise up a tall building, seeing him feasting guests, and seeing his building collapse".

In Yang Hexin's view, Zhou Chen's talent is enough, it is a rare piece of beautiful jade, it depends on whether he has the calm breath and loneliness of the heart, in this regard, what is needed is the continuous carving of him by the outside world.

Although Yang Hexin was more confident in Zhou Chen, he still had a trace of concern in his heart at this time.

Human emotions are the most elusive, even if Yang Hexin thinks he knows Zhou Chen, does he really understand? In case he overestimated the strength of Zhou Chen's heart, the conclusion he came to might be diametrically opposed to reality.

Then Yang Hexin stopped thinking about it and began to discuss with Liang Zhiyuan about an article on astrophysics in the latest issue of the journal Physics.

This is the tacit understanding between the two, whenever the latest research results come out in the academic community, the two always have a good discussion, and then make a careful evaluation of the author's point of view. Sometimes they have the same opinion, sometimes there are differences, when there is a disagreement, it is inevitable that there will be a war of words, for decades, Yang Hexin and Liang Zhiyuan The two old men have fought each other for this.

Today, the two have the same point of view, and the author of the article "Discussion on Unitity and Conservation of Probability" is very well written, and there is basically no controversy. So the ample time that was originally set aside for "quarreling" became a time for the two to chat and drink tea, which was quite boring.

"Knock Knock Knock ......"

Just as the two of them were enjoying their rare leisure, the calm was interrupted by a crisp knock on the door.

When I opened the door, I found that Zhou Chen was standing outside with a small stack of papers.

Zhou Chen didn't feel strange that his instructor was here, he originally followed the teacher's footsteps to come here.

"Xiao Chen, why are you here?" Yang Hexin asked with some surprise.

"Professor Yang, I was originally looking for you, but you weren't in the office, and the phone couldn't get through, so I thought you might be here, so I came over to take a look." Zhou Chen said.

"Oh." Yang Hexin suddenly realized.

Although an old professor like him has unparalleled energy in the academic field, he is not very good at the electronic devices that young people often play with in his daily life, and the mobile phone that the school gives him is basically only used to make calls. When he needs to find information on the Internet, he prefers to use the computer in the office.

The mobile phone really didn't have much effect on Yang Hexin, and this time, he left the mobile phone in the office.