At the beginning of April, a major event took place in the mathematics community.

The paper published in the latest issue of the Yearbook of Mathematics announces the resolution of the Corner Guess.

The so-called corner valley conjecture is to write a natural number n arbitrarily. If it is an odd number, the next step becomes 3n+1. If it is an even number, the next step becomes n/2. After a limited number of cycles, it will inevitably fall into the bottom of [4, 2, 1].

This digital game was popular in North America in the 1980s.

Prior to this, some people have used the super-calculation to test the natural number below 1100 billion, and determined that no matter how much the period expands, it is impossible to get rid of the curse of "421".

Because of this miraculous nature, this conjecture is also known as the "Hail Conjecture," because the fall of numbers is as fast and unstoppable as hail.

Now, the papers of Vera et al. give a certain proof of this proposition in the language of mathematics -

That is, the corner valley conjecture is established.

Once this paper was published, it received wide attention.

What makes the outside world different is not only the proof of the Gu Gu guess, but also the main completion of this paper is the student of Lu Zhou.

By convention, proof of this major mathematical conjecture is often not a paper. In addition to the recognition of authoritative journals, the certifier needs to be recognized by the entire mathematics community.

Usually, Princeton should arrange a report meeting for Vera and others to report the relevant research results and answer questions from scholars in the same field.

But just in time for August is the four-year international conference of mathematicians, this report will be done by the more authoritative International Union of Mathematicians.

In the second week after the publication of the thesis, Professor Prince Sanak, the Princeton Lifelong Professor and Editor-in-Chief of the Yearbook of Mathematics, found Lu Zhou and brought an invitation from the International Union of Mathematicians.

Few people received two invitations at the same International Congress of Mathematicians.

At least in Sanak’s impression, there is no.

"...Ivana Professor of the Organizing Committee of the IMU Conference sent me an email asking me to forward this written letter to you. Kakuya guessed that the proof of this major mathematical conjecture should be known by more people. It’s rare, it’s the International Congress of Mathematicians. They arranged a 45-minute report for you. Is there any time for you?”

Looking at Professor Sanak, Lu Zhou shook his head and said: "I have had a one-hour report, and I am very busy recently, I am afraid I have no time to prepare for the second report."

Sanak's eyebrows picked and picked: "About the ns equation?"

The "ns" research group officially applied for the opening of the seminar at the Institute of Advanced Studies. It is no secret to Princeton and Professor Feuffman's cooperation in Princeton.

What surprised Sanak was that the subject was only opened at the end of the previous year, and it is still less than a year.

Obviously, he does not think that Lu Zhou and Fefferman can prove the millennium problem in such a short time.

However, Lu Zhou’s answer was beyond his expectations.

Lu Zhou nodded: "Yes."

After hearing this unexpected answer, Professor Sanak’s face showed a surprised expression: “Are you sure you can solve it before August? Will the time be too short?”

Lu Zhou smiled and continued to answer this question with ease.

"When a tool is completed, fulfilling its mission is only a matter of time. I have this hunch, you should be aware of this feeling."

Professor Sanek frowned slightly and then reacted immediately.

"Do you mean the tool that you recently submitted in the "Year of Mathematics" article on ‘l manifold?”

Lu Zhou smiled and nodded: "Exactly, in my opinion, it is the key to solving the ns equation."

Hearing this affirmative answer, Professor Sanek’s heart was filled with emotion.

That paper he had heard before, because it caused a lot of controversy in the editorial department of the Mathematics Year.

Although the novelty of this particular differential manifold is unquestionable, many academic editors can't see it, what does this thing mean, or what its usefulness is.

Sanak also couldn't see it, even though he was not ignorant of the partial differential domain.

In the end, however, he accepted the manuscript of Lu Zhou and arranged it to enter the peer review process.

It seems now that his original decision was really a far-sighted thing...

......

After bidding farewell to Professor Sanek, Lu Zhou took the invitation of the IMU Conference and went to the office of the Institute of Advanced Studies to bring together his three doctoral students to open an internal meeting.

"I have an invitation letter on the 45-minute report of the International Congress of Mathematicians. Although the organizers invited me to make relevant reports, I feel that you need this opportunity more than me."

After a moment of pause, Lu Zhou’s eyes stayed on the faces of the three students for a while, then continued.

“According to the usual practice, the report will be reported by the main thesis completer. I will recommend Vera as a reporter to the International Union of Mathematicians. What is your opinion?”

Qin Yue: "Agree!"

Hardy: "Second!"

The vote was passed with an overwhelming advantage.

Looking at the two students raising their hands, Lu Zhou nodded and said with pleasure: "It seems that we have reached a consensus."

Seeing that I was sold by two teammates for a moment, Vera was a little anxious: "Wait a minute, I..."

Hardy grinned and said: "You don't have to be modest. The main part of the paper is what you did. This report should naturally go by you."

Some embarrassedly looked at Lu Zhou, and Vera’s voice became stuttered because of tension: "But I have never reported at the imu conference... I have never even participated."

"This is nothing, I am also participating for the first time, even the first time I went to Brazil. I am afraid I have to trouble Hadi as a guide." Lu Zhou smiled and said in an encouraging tone, "Your report at Berkeley." Wouldn't it be good to do it? I remember that you also got the certificate of the best young speaker. Just remember that it works on the stage."

After hearing the encouragement of Lu Zhou, Vera became a little calmer, but the expression on her face was still not completely relieved.

Looking at Vera's deputy, sometimes Lu Zhou couldn't help but wonder, is she really Slavs?

Although he did not know much about what other Slavs looked like, according to his impressions in various movies, he could not match the words timid and fearful of birth with the word Maozi.

After a pause, Lu Zhou continued: "In short, don't take it too seriously, just treat it as an ordinary report and prepare it. Not to mention that you have four months to prepare."

Fingers pinched at the corner, and Vera whispered, "Can you help me?"

Lu Zhou shook his head: "I am afraid this time."

Looking at the slightly lost expression on Vera's face, Lu Zhou paused for a moment and continued.

"When I have waited today, I will continue to retreat. This report, you can only rely on yourself."