After experiencing life in Princeton and the lecture at Beijing Normal University, Lu Qiujian is now much calmer when he sees these world's top scientists, walking around the crowd with wine glasses and chatting with them about the fields they are interested in.

Of course, this evening could only have a superficial exchange of views, and the next day was the time for formal exchanges; in the café of the Institute for Advanced Study, Lu Qiujian, Lafgo Ge, Wu Baozhu, and other scholars who were interested in the Langlands Program sat down at will, drinking tea or coffee, and exchanging ideas.

In the center of the café is a blackboard where anyone who has an idea can stand in front of it and say what they think, and the blackboard is used to show their rough derivation process and important formulas.

The atmosphere of the exchange was relaxed and intense, and Lu Qiujian, Lafgo Pavilion and Wu Baozhu all stepped forward to show their latest research progress to everyone, and they all benefited a lot.

The exchange lasted for three days, each time on a different topic, from the beginning of the Langlands program, to the middle of the Motive theory, and finally to the latest advances in quantum physics.

The sparks of thought collided violently in the café, which seemed a little cramped because it was crowded into too many people, and those who could enter this café were all the top figures in their respective fields, and most of them were not very old, except for Serge and Arroche, they were energetic and sharp-minded, and they rarely met anyone who could keep up with their own speed of thinking, and even if they did, they were old friends of the Institute for Advanced Study or the École Normale Supérieure in Paris, the University of Eleven, and other institutions.

Since they are old friends, they are more familiar with each other's thinking patterns, far less fresh as Lu Qiujian can bring them, and the most commendable thing is that Lu Qiujian's research field seems to be more extensive, and he can put forward novel ideas no matter what topic he talks about.

Lu Qiujian is like a catfish that has entered a school of sardines, constantly bringing them fresh stimulation, making them passionate, and the spark of inspiration in their minds keeps flashing.

This feeling reminds physicists such as Arosh of the Copenhagen School of Bohr and Heisenberg, Bonn, Pauli and others. Mathematicians such as Laffoe had in mind the Princeton tea time advocated by Leo Schetz, and although the era, place, and people participating in the discussion were different, the spirit of unity and harmony of free discussion contained in it was the same.

So much so that when Lu Qiujian was about to leave, they were all reluctant, as if the pilot who had lost the leaves, and the otaku who had been deleted from the fast broadcast, listless and extremely lost.

Lafoge drove Lu Qiujian back to the hotel, rested for the night to adjust his condition, and let himself recover from the excitement of the previous days, Lu Qiujian embarked on a journey to find Grothendieck.

Having hired a car for him, Lüciujian set out to the south of France, where he had been living in seclusion in a small village in the Pyrenees for nearly a decade.

After a day's stance, Lu Qiujian first came to the city of Fois, about 800 kilometers from Paris. The city is the capital of the department of Alège, part of the Pyrenees region of the south of France, and is not far from the small village of Grothendieck.

But since it is a mountainous area, of course the road will not be easy to walk, but fortunately, Lu Qiujian has done a solid job of preparation, and after entering the area where vehicles cannot drive, he put the car in the town and walked forward on foot with his backpack.

"I really don't know how Deligne came to this age at such a young age!" This distance can only rely on foot, and Lu Qiujian not only admires Deligne's physical condition.

After a few more hours of walking, at sunset we finally arrived at the secluded mountain village of Grothendieck, who now lived in an old house without electricity, and if not for the occasional corner where a few pieces of paper with intricate formulas could be found. I'm afraid no one will notice that this is the residence of the greatest mathematicians of the second half of the twentieth century.

"You rest for a while, and I'll get you something to eat!" Grothendieck led Lucchujian to the fireplace, and staggered to the kitchen.

"I'll do it, I can go to the kitchen and see if I can cook some Chinese food for you!" Lu Qiujian couldn't bear to let him cook for himself, and hurriedly rushed to the kitchen.

The condiments unique to Chinese cuisine are definitely woody. The kitchenware doesn't fit very well, but it's okay to cook some simple dishes;Lu Qiujian smiled dumbly while cutting shredded potatoes, he didn't expect that the object of cooking for others for the first time was not a cute girl but an old man!

After eating, people pulled chairs and came to the courtyard to bask in the moon, drink coffee and chat, and first told Grothendieck about the changes that had taken place in the world of mathematics in the past six months. Although Lu Qiujian's ten questions caused a stir in the mathematical community, their influence is slowly declining as time goes by, and the new journal does not receive many manuscripts per issue, which is due to strict quality control. The first few issues had very few pages.

"These things need time to precipitate, and there is no way to change those stubborn guys in the short term!" If a mathematician who has been doing research in a field related to the problem proposed by Lu Qiujian is okay, it is not so easy to change the direction of research rashly if he is doing research in other fields.

"Yes, so I'm going to trouble you again!" Of course, Lu Qiujian knew this, so he made a special trip to the Pyrenees to look for Grothendieck; if he hadn't come forward at the last meeting, the change in the mathematical world would have been smaller! He didn't have time to wait for the changes in the mathematical world, and continuing to use Grothendieck's influence became his best choice.

Grothendieck shook his head, "I'm not interested in the study of mathematics now! ”

"I don't dare to bother you to do research, I just hope to borrow your huge influence in the mathematical world!" Lu Qiujian certainly did not ask Grothendieck, who had been in seclusion for more than ten years, to re-emerge.

"Oh, what do you need me to do?" asked Grothendieck, looking at the moon in the distance, in a distant voice.

"In my opinion, any change needs to be driven by people, and it takes a lot of papers to push the mathematical community to change direction. Lu Qiujian had already thought of a solution, "If you want to get a paper, you need someone to be interested in this new journal! So I hope you can be named the honorary editor-in-chief of the journal!"

Lu Qiujian explained his intentions, wanting to use Grothendieck's reputation to expand the magazine's influence. (To be continued.) )