"Let me think about this matter, and I'll give you an answer before I leave Kyoto!" Ruan Yichen pondered for a moment before saying to Duan Yun.

"Yes!" Duan Yun nodded.

I want to meet Xiao Nan. Ruan Yichen said.

"As I said just now, Xiao Nan is at work now, I will arrange for you to stay in the hotel for the time being, and you can see her after work in the evening. Duan Yun said to Ruan Yichen.

"What kind of work did you arrange for Xiao Nan?" Ruan Yichen asked curiously.

"He's now an artist in my company's animation division and is currently working on a high-quality animated film. ”

"Well, the anime is good, Xiao Nan used to like to draw, and she is also a professional counterpart. Ruan Yichen nodded when he heard this, and then said, "It's not bad to be able to arrange such a job for her, hey...... In fact, Xiao Nan's life is also very bitter, but fortunately I met a noble person like you. ”

In fact, you are her nobleman. Duan Yun smiled, and then said: "Eat first, wait for me to arrange a hotel for you to stay in nearby, and then you can contact Xiao Nan yourself." ”

"Okay. Ruan Yichen answered, then picked up the chopsticks and began to eat.

……

After dinner, Duan Yun arranged Ruan Yichen before returning home.

After habitually turning on the computer, Duan Yun found an email sent to him by Guo Haitao in his mailbox.

After downloading the attachments of the email, Duan Yun was surprised to find that these were the graduation theses of Dr. Hua Qing over the years and the electronic versions of authoritative mathematics journals at home and abroad that Guo Haitao had sorted out for himself.

In the last email, Guo Haitao helped Duan Yun list some hot research topics in the current mathematical field, which can be used as the subject direction of thesis research.

This immediately aroused Duan Yun's interest.

Duan Yun wasn't interested in titles like honorary professors, but his love for mathematics came from the bottom of his heart.

Compared with the previous Olympiad problems and password cracking given to him by Guo Haitao, these top topics in the mathematics field are more challenging and interesting.

If human cognition is regarded as a circle, then a qualified doctoral dissertation is like a point slightly protruding from the inside of this circle, although there are few breakthroughs, but this is indeed a progress in human cognition.

It is precisely because of such a high degree of difficulty that it is difficult to 'mass-produce' a doctorate degree, which is very rare.

There are even master's students who have been studying hard for eight years, ten years or even longer but have never been able to complete their doctoral dissertation, which shows that the doctoral dissertation is definitely not something that can be completed by hard work alone.

In the face of such a new challenge, Duan Yun's mood was undoubtedly excited, and now his enthusiasm for this kind of mathematics was almost a little fascinated by the fact that an Internet addicted teenager faced an online game.

So much so that from noon to midnight, when Duan Yun was so sleepy that he couldn't open his eyes, this time he closed the computer and fell asleep.

Early the next morning, Duan Yun opened his eyes, washed up briefly, and began to study the mathematical paper again.

Although Duan Yun has master-level mathematical proficiency, this does not mean that he can easily write a mathematical paper with high academic value.

Moreover, Duan Yun chose the most difficult proposition among the dissertation directions listed by Guo Haitao this time, which is the so-called 'Hodge conjecture'!

The Hodge conjecture is a major unsolved problem in algebraic geometry. Proposed by William Valens Douglas Hodge, it is a conjecture about the correlation between the algebraic topology of a nonsingular complex algebraic cluster and the geometry it is expressed by the polynomial equation that defines the subcluster. It is one of the world's seven major mathematical problems.

Nowadays, the world's mathematics community, many top universities at home and abroad, as well as some authoritative institutions in mathematical research, have given high rewards to those who can prove Hodge's conjecture, with prizes as high as three million US dollars!

For real mathematicians, the prize of three million is not what they value the most, and the ease that solving this problem can bring them is what every mathematician dreams of!

As one of the world's seven major mathematical problems that have been unsolved for a long time in the mathematical community, the Hodge conjecture has been a problem that has plagued the world's top mathematicians for nearly a century, and anyone who solves this mathematical problem can win the highest award in mathematics without any suspense, the Fields Medal, which is known as the Nobel Prize in mathematics!

Guo Haitao put this thesis topic at the end of all the topics, and reminded Duan Yun that this topic is not the best direction for topic selection.

However, Guo Haitao obviously underestimated Duan Yun, a 'newborn calf'.

The difficulty of this Hodge conjecture was indeed beyond Duan Yun's expectations.

From yesterday afternoon to evening, it was close to noon, and Duan Yun didn't write a single number.

I can't find a clue at all!

This difficulty made Duan Yun smack, you must know that even when Duan Yun cracked the military code before, although it took a lot of time, he was able to quickly find some solutions to the temptation at the beginning.

At noon, Duan Yun received a call from Jiang Yi.

This made Duan Yun feel a little surprised.

Since Jiang Yi became the general manager of Clear Sky Film and Television, he actually didn't have much contact with Duan Yun.

And because Duan Yun restricted Jiang Yi's rights in the company, and also arranged for a direct cronie like Chen Jia and Gao Jing, this made Jiang Yi feel very unhappy.

At the beginning, Jiang Yi wanted to turn this film and television company into a team in his alumni circle of China Film Academy, but after Chen Jia arrived, he hired a lot of film and television practitioners who were 'outsiders' in Jiang Yi's eyes with a high salary, and formed her own lineage team, which undoubtedly made Jiang Yi, the 'number one' of the company on the bright side, very unhappy.

During this period, Jiang Yi had serious disagreements with Chen Jia because of the signing and employment of some important positions in the company, and he also called Duan Yun to discuss these matters.

But the final result was that Duan Yun was obviously more biased towards Chen Jia, and he also made no secret of his trust and appreciation for Chen Jia on the surface, which finally made Jiang Yi have a grudge against Duan Yun.

In Jiang Yi's view, he is the 'number one hero' in the formation of this company, and at the same time, his seniority in the film and television industry is very old, Duan Yun is just a junior in his eyes, just a layman with money and connections, and he actually looks down on Duan Yun in his heart.

It's just that Duan Yun is the legal representative of the company, and he has an irreplaceable position in the company with a strong background, so Jiang Yi can only swallow his anger, after all, Duan Yun's salary for him is still quite high.

However, the relationship between the two has also begun to be a little cold since then, and they have not spoken on the phone for nearly a month.

So after receiving Jiang Yi's call at this time, Duan Yun was still a little surprised.