In the afternoon, Ouyang Xiangnan didn't bother Duan Yun anymore, and led Gao Jing to London to go shopping and play.

Ouyang Xiangnan herself had studied in Europe for a while before, and she was still somewhat familiar with London, plus she was fluent in English, so Duan Yun was not worried about what would happen to the two girls shopping here.

Duan Yun spent a whole morning explaining to Fefman the new method of proving Hodge's conjecture, and at the same time, he also let him see the new formula he had newly created, which benefited Fefman a lot.

In the afternoon, Duan Yunyou explained to him the proof of the Riemann conjecture.

In fact, although the paper on Duan Yun's Riemann conjecture has not been published in a journal for a long time, in fact, Fefman has been repeatedly studying this paper on the Riemann conjecture for several days, and he has even memorized every formula and character of Duan Yun's paper.

However, when Duan Yun explained this paper, he played a new trick, he used the newly thought proof method to reduce the proof step of his original paper by one-third, and directly made Fefman look stupid.

You must know that when Fefman looked at Duan Yun's paper on the Riemann conjecture before, he was deeply impressed by Duan Yun's unbridled imagination, exquisite and concise and rigorous logical reasoning ability, in his opinion, Duan Yun's paper is simply perfect, and it is impossible to delete the content of this paper, which can be called the highest level of paper after he entered the field of mathematical research.

However, what Fefman didn't expect was that less than half a month after he published his paper, Duan Yun actually thought of a new way to improve his paper again, and actually directly shortened the paper by one-third of the steps, which is definitely an incredible thing!

In fact, Duan Yun didn't deliberately want to show off his mathematical talent in front of Fefman, he did it completely because of his character to strive for perfection in everything.

At the beginning, in order to overcome this Riemann conjecture in a short time, after activating god-level mathematics, Duan Yun turned on the god-level operation of his brain, and relied on severe overdraft of his physical strength to successfully complete the thesis in one night.

Although it proved successful, in fact, this Riemanchai paper was the result of a hurry, and with Duan Yun's strength, there was still a lot of room for improvement.

Therefore, even though this paper has been published, after more than a week of quiet thinking by Duan Yun, he still came up with a more optimized and refined content of the paper.

It was another whole afternoon, and Duan Yun taught Fefman a lesson again.

By this time, Fefman's eyes as he looked at Duan Yun were already full of shock and admiration.

At first, after Fefman inquired about Duan Yun's situation from his former Huaqing colleagues, he thought that Duan Yun probably relied on the help of his master, who was a professor at Huaqing University, to complete these two papers, but after Duan Yun explained the new Hodge conjecture argumentation method in the morning, he no longer questioned Duan Yun's ability to complete these two papers.

However, through Duan Yun's re-argumentation of Riemann's conjecture in the afternoon, Fefman discovered a shocking fact, that is, Duan Yun may be a unique super genius in the history of mathematics in the whole world!

Generally speaking, they are also mathematicians, but in fact, they specialize in the classification of disciplines, such as Fellman, whose mathematical classification is topology, and most of the papers he has published in the past few decades are also about topology.

As for other mathematical classifications, Fellman can only say that the level is also very high, but it is definitely not the top level, after all, mathematics is a broad and complex ancient science, and people's time and energy are limited in their lives, even geniuses cannot study all mathematical classification disciplines to the top level in their lifetime, this is an objective law of existence.

However, when Duan Yun explained Riemann's conjecture in the afternoon, Fefmann was surprised to find that Duan Yun not only invented new formulas for topology, but also innovated new formulas in other disciplines, and in front of Fefman, he proved and solved these new formulas in detail.

At the end of the listen, Fefman felt ashamed and lost for the first time in his life.

Fefman's life has always been full of legends, he published his first paper at the age of fifteen, went to college at the age of seventeen, and became a professor at a well-known university in the United States at the age of twenty.

For decades, Fefman has been a leader in international high-end mathematics, and has won various top world honors, even in today's era of rookies, no one can shake Fefman's status as the first person in the mathematical field, until today he met Duan Yun.

Fefman finally had a sense of crisis, in his opinion, Duan Yun's mathematical talent seemed to be a little unfathomable, and the mathematical talent that he had always been proud of was not worth mentioning in front of Duan Yun at all, and even compared to Duan Yun, he was like a beginner apprentice!

Outside the window, it was getting dark.

After sitting opposite Duan Yun for a whole day, Fefman's whole body suddenly felt soreness and severe pain after Duan Yun finished talking about Riemann's conjecture.

"Mr. Fefman, are you alright?" Seeing that Fefman's face was a little painful, Duan Yun frowned, and hurriedly asked with concern.

"I'm sorry......" Fefman frowned and said to Duan Yun, "I need to take a break......"

After all, Fefman was over seventy years old, and he spent a whole day listening to Duan Yun's lectures without eating or drinking, and he was indeed a little exhausted.

"Mr. Fefman!" At this time, the curly-haired young man in the restaurant also noticed that the situation was wrong for the first time, and hurriedly stepped forward to support Fefman.

“…… It's okay for me, thank you very much for Mr. Duan Yun's wonderful explanation today. Although his face was a little painful, Fefman's eyes were full of excitement when he looked at Duan Yun, and he continued: "I hope to become true friends with Mr. Duan Yun!"

"It's also a pleasure for me to meet Mr. Fefman!" Duan Yun shook Fefman's outstretched hand as he spoke.

Fefman held Duan Yun's hand tightly, very hard.

"I'll just rest for the night, and I look forward to seeing you again tomorrow at the conference. With that, Fefman left the dining room with the help of the curly-haired staff.

Seeing Fefman leave, Duan Yun couldn't help but breathe a sigh of relief, feeling that his stomach was already starting to be hungry, and then snapped his fingers at the waiter next to him.