Chapter 379 Xu Shen, it’s time to show off
Friday, January 2th.
Kyoto had its first snow after the New Year. Heavy snow was falling outside the window. Everywhere I could see was covered in white. I could vaguely see some human figures walking by.
"This may be the last snow in the first half of the year."
"Damn, he must have been infected by Song Yao. He actually ran outside to freeze like an idiot."
Xu Qingzhou muttered and turned back to the house, went to the kitchen to check the pork rib soup he had stewed. Seeing that it was almost time, he put on his apron and prepared to cook.
Twenty minutes passed.
At the door, two girls stamped their feet, shook off the snow on their bodies, and went into the house.
Zhang Qiong rubbed her hands, "Oh~ It's so cold. Xiaoyao, the heating here is much warmer than in the dormitory."
As he was speaking, half of a body popped out from the kitchen. It was Xu Qingzhou.
"You guys sit down for a while." Xu Qingzhou raised the spoon.
"Oh, okay." Although it was the second time that Zhang Qiong saw Xu Qingzhou as a househusband, he still had a strange feeling.
The contrast with the Internet is too great.
A super academic genius and a househusband are totally unrelated.
Zhang Qiong was a little envious. She felt that the environment was so warm and it felt like home.
"Sit down first." Song Yao walked over and looked at the kitchen. Seeing that Xu Qingzhou was already cooking, she poured a cup of hot water for Zhang Qiong first.
"Second meow~"
Girls may have no resistance to furry things. Zhang Qiong warmed her hands with the cup and ran over to play with Er Miao.
The second cat hung its head, looked down on the two-legged beast that poked it with its finger, and meowed twice in disgust.
At 6 o'clock in the evening, the three of them were already sitting around the dining table.
Four dishes and one soup, all delicious and delicious.
"It's better than what we ordered at the Sichuan restaurant." Zhang Qiong nodded in praise.
Xu Qingzhou said proudly: "Of course, the chef's level is unique and there is no other restaurant. If I lose my job in the future, I will open a restaurant."
"This person cannot be praised." Song Yao and Zhang Qiong said.
Zhang Qiong smiled and sighed: "I don't even know how to cook."
"Take it one step at a time. I couldn't do it before." Song Yao comforted.
Xu Qingzhou nodded and sighed: "Yes, even leeks and hiss~"
Someone's foot was stepped on hard.
"What's wrong with you?" Zhang Qiong looked at Xu Qingzhou in confusion.
Song Yao narrowed her eyes and looked at Xu Qingzhou.
"fine."
Under the threat of death, Xu Qingzhou shook his head and stopped talking nonsense. He asked, "Are you going to continue your postgraduate studies?"
"Yes, if I don't study, I don't know what to do, so I might as well just keep studying."
Zhang Qiong didn’t have any idol baggage, so she ordered a second bowl of rice and nodded.
For those who enter Kyoto University, postgraduate study is more about whether they want to study, rather than whether they can pass the exam. After all, Kyoto University's admission rate has always been in the 40s and 50s, and in some years it can even reach more than 60%.
Many of the others who did not receive admission to graduate school also went abroad to study.
On the contrary, only a small number of people actually start working after graduating from college.
Song Yao had been in contact with Zhang Qiong quite often, so she knew her situation very well: "For you, it should be no problem to be admitted to graduate school."
Zhang Qiong nodded, and sighed in annoyance: "Now I am struggling with how to choose a mentor and what direction to take."
"For many people, the ideal postgraduate life should be like this: a promising research direction, sufficient project funding, one or two horizontal projects to enrich the resume, several vertical projects to publish articles and get various scholarships, and a supervisor to personally guide the thesis..."
Xu Qingzhou had finished eating. After drinking a mouthful of soup, he analyzed the meal for Zhang Qiong.
"Yes, yes, yes." Zhang Qiong's eyes lit up.
"But" Xu Qingzhou paused, spread his hands and said: "The probability of meeting such a mentor is not high."
Xu Qingzhou once studied from a master's degree to a doctorate, and he has many feelings about this.
"The first type is that the supervisor has already transferred to the administration and will not personally guide the students. Usually, there are PhD students to guide the students. They are familiar with the routines of patents, competitions, articles, scholarships, etc., but there are no suitable jobs for them in China."
"The second type is when the supervisor is a senior professor who focuses on pure academics and does not take on any horizontal projects. He only wants PhDs and Masters, so there is little hope."
For example, Academician Chu Jiangfeng no longer even has a doctoral degree and focuses all his energy on scientific research.
"The third type is that the mentor has too many projects and the students are just pure slaves, and there is never enough work to do. Of course, this situation is still OK."
Xu Qingzhou leaned back in his chair and spoke lazily.
There is also a supervisor who is the director of a research institute. He has great authority and does not care about the life and death of the researchers. His subordinates even have to worry about starting a project.
Or the tutor is relatively young, with insufficient funding for regular projects and few accumulated results. The advantage is that he is serious, personally guides you at every step, and can also revise your thesis word by word.
Or maybe the tutor is an associate professor who has no other aspirations and teaches in a very Buddhist way, or even gets along well with students. The results depend on the students themselves.
Of course, everything is relative. For example, when it comes to insufficient funding, the funding shortage of a research group at Kyoto University is far greater than that of some lower-tier universities.
"Okay, I've made a note of it and will seriously consider it." Zhang Qiong nodded. She had never thought of studying for a master's degree under a big shot in a certain field like Li Daiyue, or under the guidance of an academician, like Xu Qingzhou and others.
I will be very satisfied if I can get a place in graduate school in August or September.
It's not that she herself has fallen, but it's super, super difficult.
If you want to enter top universities like Kyoto University and Mizuki University, you really need intelligence. Then, you will feel like you are being pushed to the ground and you will realize what the gap is.
That’s right, the more top-notch the school, the more obvious the difference in IQ is.
After the three of them finished their meal, they let Song Yao and Zhang Qiong chat while Xu Qingzhou took the initiative to wash the dishes.
Zhang Qiong was shocked. "Xiaoyao, your life is so enviable."
Song Yao: "You can also find one."
"No chance."
Zhang Qiong said bitterly, "It's possible in the freshman and sophomore years, but it's the second semester of the junior year. I wish I could spend 24 hours reading books. How can I have the energy to fall in love?"
After a pause, she smiled and said with her chin on her hand: "Besides, my own love life is not as beautiful as watching you guys' love life."
"It's still nice to talk by myself." Song Yao looked towards the kitchen. In winter, they could hide in the warm bed together, which was much more comfortable than sleeping alone before.
"When I have nothing to do, I come to your place and eat some dog food. As for love, I'll wait until I'm a graduate student."
Zhang Qiong also glanced at the kitchen: "Your Xu Qingzhou is so virtuous."
She found it funny when she thought about how she had secretly followed Xu Qingzhou and tried to take photos to get evidence of his "cheating".
"Virginity." Song Yao sighed inwardly. Virtuous, right? Tonight, I have to pay it back. This guy has taken care of me for several days, and I finally waited until tonight.
School beauty Song was worried.
Zhang Qiong stayed until 8 o'clock in the evening and then said goodbye and left.
After Song Yao came back from sending Zhang Qiong, she leaned back on the sofa and put her feet into Xu Qingzhou's arms. She rubbed her white socks on his legs and said, "It's the original flavor you like."
"."
"I'm not a pervert."
"I know, be gentle, it's a little itchy."
It was still early, so the two of them sat down to digest their food.
Xu Qingzhou was rubbing the feet of the school beauty Song. He felt a little bored, so he simply opened Weibo.
With 260 million followers, the comment section and private messages are quite lively.
"God Xu, it's time to show off." "Harmony is as deep as the sea. I look forward to God Xu creating more glories in the field of harmony."
"Really? Every time I feel hopeless about writing a paper, I will check out Xu Shen's Weibo, and then I will feel even more hopeless."
"I think everyone should stop expecting anything and look at what this is."
Someone sent a photo, and Xu Qingzhou clicked on it. It turned out to be the paper on the model he had made for Professor Zhao Shengwen and his team last time.
"I discovered this when I was reading a paper yesterday. Master Xu has done another physics SCI paper. He definitely doesn't have time to study harmonic analysis."
"I knocked, what a coincidence. Look at this again."
Another screenshot.
"It's outrageous that a researcher like me in the field of economics can read God Xu's paper. You don't know about the ARIMA model. My boss was very depressed. He had just started the project and led the team to work hard for two months, but then Xu Qingzhou was hit by a bolt from the blue."
"Fuck, I know physics, but why did Master Xu go to the field of economics again???"
"Don't ask, just say it's awesome."
"God Xu: Hey, I'm just having fun."
"I seem to understand one thing. God Xu is doing everything except reconciliation and analysis."
"I can't do the reconciliation and analysis anymore."
"Normal. After all, it is completely different from the field that Xu Shen studied before."
"Not necessarily. That's only true for ordinary people. Is Xu Shen a human? No."
Xu Qingzhou had a strange expression on his face, as if he felt that this person was scolding him.
"I really said it, if this can be done in a new way, I will eat shit while standing upside down."
Xu Qingzhou couldn't help but laugh. The Internet was indeed full of talented people. After glancing at Weibo for a while, he put away his phone, pinched Song Yao's feet, and said, "It's time to take a shower."
"You go by yourself."
Song Yao already knew what this guy wanted to do, in the bathroom, which was too messy, and she could not satisfy his bad taste.
"Ok."
Xu Qingzhou shrugged and said.
This made Song Yao stunned for a moment. This guy has changed his personality.
However, when Xu Qingzhou pounced on her and hugged her, she knew it.
"Xu Qingzhou, let me go!"
"Xu Qingzhou!"
the next day.
It was 10 o'clock in the morning when the two of them got out of bed.
Song Yao gargled and said, "Auntie Wang sent us some bacon. Remember to pick it up later."
"The relationship between you and your mother-in-law is so weird." Xu Qingzhou leaned against the bedroom door frame.
"No way." Song Yao wanted to refute, staring, "How can it be a mother-in-law and daughter-in-law relationship?"
Xu Qingzhou shrugged. The fighting scenes between mother-in-law and daughter-in-law that appeared in TV dramas would probably not happen to Song Yao and Ms. Wang.
Ms. Wang and her family have always believed that the older generation should not interfere in the affairs of the young. When they go home, Mr. Xu and Ms. Wang always ask about his and Song Yao's situation.
Never tell you what you should do.
As for Song Yao, she would not seek death like the heroine in the TV series.
School beauty Song was wearing a long pink nightgown. Her beautiful figure was hidden underneath the loose nightgown, and it was trembling slightly as she washed.
Xu Qingzhou couldn't help but pinch her, causing School Beauty Song to chase him and beat him for a long time.
After lunch, the two of them went about their own business.
Xu Qingzhou found an empty seat in the library and started calculating.
During the Chinese New Year period, he completed the proof of the variable coefficient version of the square function inequality and began to improve the Mockenhaupt-Seeger-Sogge local smoothness results.
Now the goal is also clear, let {Xη)} be a series of smooth truncated functions of degree 1 belonging to the angular decomposition, hoping to improve the best estimate in local smoothness and the estimate obtained by the trivial L estimate interpolation.
After finishing this part, Xu Qingzhou's proof goal will be almost completed.
After the study of local smoothness is finished, can we challenge the next difficult mathematical problem?
"and many more."
Xu Qingzhou shook his head and lamented that he seemed a little too proud. He hadn't even solved the problem at hand, but he was already thinking about the next challenge.
In March, the weather gradually warmed up, and the treetops began to sprout green, adding some vitality to the originally bleak environment.
Yandong Garden.
In the evening, the setting sun hung in the southwest sky, and the sunlight fell through the glass into a corner of the living room. Er Miao lay lazily in the sun.
Sitting at the table, Xu Qingzhou frowned, and a pile of discarded manuscripts were spread out on the upper right corner of the table.
Since mid-February, for more than ten days, Xu Qingzhou has been stuck on a formula. Specifically, it is the lack of estimation of the variable coefficient Kakeya maximal function L^p- L^p in the direction of the light cone.
The Kakeya maximal function is a variation of the Hardy-Littlewood maximal function.
When p > 2, the norm in L^p space is more sensitive to the fluctuation of the function, which means that when estimating the Kakeya maximum function, it is necessary to control the volatility and extreme value behavior of the function more precisely.
"What if we first define a simplified function space F?"
After thinking for a moment, Xu Qingzhou shook his head again and rubbed his temples, "This won't work."
squeak~
Song Yao had just returned from school. As she put down her schoolbag, she said, "Xu Qingzhou, change your clothes and go out for a run."
"okay."
The person at the table answered, but there was no movement.
Song Yao frowned, walked over, hugged him from behind, and twisted his ears, "Teacher Xu~"
"It will be almost done. It will be done soon." Xu Qingzhou said.
Song Yao sniffed Xu Qingzhou's neck, feeling the familiar and comfortable smell. "Don't waste time if you can't get out."
"."
"I doubt you're driving."
"You have dirty thoughts." Song Yao would not admit that there was something wrong with her words. She got up from Xu Qingzhou, went in to change clothes, and prepared her sports equipment. "Oh, by the way, if I see you still sitting when I come out, hum~"
"."
They both put on windproof jackets and went out.
In mid-March, the evening wind was still a little chilly. Xu Qingzhou couldn't help but shrink his head and continue to think about the calculations he had just made.
Song Yao turned around and looked at her boyfriend who seemed to be still busy with his calculations, and said, "Last time you said you wanted to derive an inequality related to the Kakeya maximal function and the L^p norm."
"Well, I just tried it today and it didn't work." Xu Qingzhou said helplessly.
Song Yao thought for a moment and then said, "Different p-values, the subtle and special properties of Kakeya sets, approximate calculations or finding the upper and lower bounds of maximal functions. Hey, what's wrong with you?"
Song Yao was speaking when she suddenly found Xu Qingzhou stopped abruptly.
Xu Qingzhou said in a deep voice: "Now that you mention it, I seem to have some new ideas."
In L^p space, the purpose of studying the estimation of Kakeya maximum function is to understand the behavior characteristics of the function on the Kakeya set. If we infer from some characteristics of the Kakeya set, perhaps
“It seems to be very interesting.”
Xu Qingzhou nodded slightly, even a little impatient, "How about you..."
Song Yao came over, put her arm around Xu Qingzhou's neck, stared at him with sparkling eyes, and said gently: "If that happens, I can hardly guarantee that I won't pound you into the wall."
(End of this chapter)
