Chapter 197 You, a quasi-college student, want to weaken the twin prime conjecture? !
“Is it Xu Qingshan?”
Jiang Jingyi on the side intervened and asked, as if a key word had been triggered.
"Can you take me with you? In fact, I am also quite interested in mathematics."
Jiang Yuhua looked at his little niece with a strange expression.
Didn’t you just say that you are not good at math, can’t understand it, and don’t want to learn math, so you chose journalism? Why did you turn around and say you were interested in mathematics?
Jiang Jingyi bit her lower lip lightly and stared at Jiang Huanxi.
She knew that she could make Sister Huanxi compromise by doing this all the time. She didn't care about mathematics or not. She only cared that she could still meet Xu Qingshan.
She didn't believe it.
She didn't believe that Xu Qingshan's previous two years of care for her were all fake, and she didn't believe that Xu Qingshan really didn't have her in his heart.
She didn't even believe that when she had turned around and wanted to be with him, Xu Qingshan's heart would be as warm as a stone.
"cannot."
Jiang Huanxi looked at Jiang Lihua, then at Jiang Jingyi, and shook her head firmly.
"Why?"
Jiang Jingyi stared at Jiang Huanxi with dissatisfaction in her eyes.
"If you want to see him, just make an appointment with him yourself. I'm going to discuss mathematics with him. I don't want him and I to be disturbed."
Jiang Huanxi said seriously and word for word.
"Then why are you willing to let my sister-in-law go?"
Jiang Yuhua had a taiyaki in his mouth and looked at the two juniors competing here. He didn't turn his head for a while, but Jiang Jingyi suddenly said that she was also a little sluggish.
What?
Have I eaten myself?
"Because my sister-in-law has a PhD in mathematics from Princeton, maybe she can help."
Jiang Huanxi frowned. She didn't like her sister losing her temper with her and trying to show her prestige as the eldest lady.
Qingshan said that he should be more confident.
"Besides, I didn't say that I must take my sister-in-law there. I will respect his opinion. If he agrees, I will take my sister-in-law with me."
Jiang Huanxi said persistently. Although she was explaining, her aura was very strong.
She was not like an ostrich who usually buries her head in the soil and pretends not to see anything when encountering problems. She was very determined at this time.
Even Jiang Lihua and Jiang Yuhua glanced at each other subconsciously.
As elders who cared deeply about their two children, they were naturally able to notice the changes in Jiang Huanxi.
If it were normal times, even if Jiang Huanxi disagreed with Jiang Jingyi's request, she would definitely not refuse so bluntly in front of the elders in public, not to save Jiang Jingyi's face.
"Why do you all do this to me?"
Jiang Jingyi's nose felt sour.
Xu Qingshan has changed, and so has Sister Huanxi.
Originally, these good things, these favors, these should be used for myself. Why did everything change in just one year?
She couldn’t understand.
"Jiang Jingyi!"
Jiang Lihua frowned and suddenly said.
When Jiang Huanxi rejected Jiang Jingyi just now, she didn't say anything because she also loved Jiang Huanxi.
Normally Jiang Huanxi is always soft-spoken and Jiang Lihua will support her. Today Jiang Huanxi is inexplicably tough. Even though it is her daughter who is being criticized, Jiang Lihua feels very relieved.
"Don't shed tears outside."
Jiang Lihua looked at Jiang Jingyi.
Jiang Jingyi turned her head to look at her mother unconvinced.
"You don't love me at all! Even though I didn't get into Beijing University, you said that no matter what I do, it's wrong! You didn't let me choose when I wanted to, and you made me choose when I didn't have a choice."
Jiang Jingyi shed tears and spoke loudly to her mother, as if she was accusing her.
She couldn't control her emotions, and grievances kept growing in her heart.
Jiang Lihua was shaking with anger, and she raised her right hand.
Jiang Jingyi stared, raised her face, and waited for Jiang Lihua's slap to fall.
But the next moment.
"Sister, what are you doing?"
Jiang Yuhua stuffed all the snacks in Jiang Huanxi's arms, stepped forward and grabbed Jiang Lihua's hand.
"Listen to what she said!"
Jiang Lihua was also very angry. She looked at the eyes of passers-by on the left and right, and felt even more uncomfortable.
She never liked losing face outside.
But Jiang Jingyi made her embarrassed again and again.
“We’ll talk about it when we get back, we’ll talk about it when we get back.”
Jiang Yuhua pushed Jiang Lihua and then pulled Jiang Jingyi towards the place where the car parked, while Jiang Huanxi followed behind in confusion.
The original conflict between Jiang Jingyi and Jiang Huanxi turned into a conflict between mother and daughter Jiang Lihua.
After returning home, the uncle and aunt began to comfort the mother and daughter, and took them to chat respectively. Only then did Jiang Huanxi and her sister-in-law go to the rooftop to chat.
"Sister-in-law, am I doing this wrong?"
Jiang Huanxi asked hesitantly.
"Xiaoxi, if you knew that tonight would be like this and asked you to choose again, would you still reject Jingyi?"
Jiang Yuhua did not answer Jiang Huanxi directly, but turned to ask Jiang Huanxi with a lollipop in his mouth.
"meeting."
Jiang Huanxi did not hesitate this time and nodded seriously.
"great."
Jiang Yuhua said.
"You were not wrong, you did the right thing."
“Learn to say no and say no to things you don’t want to do, even if it’s your loved ones.”
Jiang Yuhua and Jiang Huanxi were chatting.
Jiang Huanxi listened to Jiang Yuhua's life teachings, but she was thinking about the words Xu Qingshan taught her. Inexplicably, she felt sweet in her heart.
When Jiang Yuhua saw Jiang Huanxi's originally somewhat sad face burst into a smile again, he felt that it must be his own fault, and decided to give himself two more chicken drumsticks for lunch tomorrow.
Unfortunately, she had no idea that her niece was listening to her and thinking about others.
Isn't this a kind of NTR?
"By the way, the boy you are going to meet tomorrow, does Jingyi like him?"
"Probably so."
Jiang Huanxi nodded.
Jiang Jingyi told herself more than once that she wanted Xu Qingshan.
"What about you?"
"Me too. Huh? No"
Jiang Huanxi replied subconsciously, but before he could say anything, he saw her sister-in-law's eyes that were half-smiling, and her blood rushed to her brain. Her whole body was like a steam engine. She quickly lowered her head to deny it, but even under the moonlight, she The blush on his face is also very obvious.
"You are 18 years old too, what are you embarrassed about?"
"Face your feelings."
"Didn't he promise that my sister-in-law can accompany you tomorrow? Then my sister-in-law will help you check. Don't worry, my sister-in-law's eyes are like rulers! She will never see the wrong person."
Jiang Yuhua said openly.
"Then, sister-in-law, why haven't you been in love yet?"
"You know how to understand love better only if you've never been in a relationship before?"
"Aoyama and I have no intention of falling in love."
"That means one of you two hasn't figured it out yet, and I think it's you."
"We're really just talking about math! Just number theory!"
"Oh, it's just an excuse. You are only 18. You are already good at understanding what number theory is."
"He is very powerful!"
"Tch, I started protecting you even before we fell in love."
"I didn't! I'm telling the truth! He's really awesome!"
"Ah, yes, yes."
If there are people who can mobilize Jiang Huanxi's emotions to the level of excitement, there are probably only a few in the world. But Jiang Yuhua definitely counts as one.
Xu Qingshan also counts.
The emotions between mother and daughter Jiang Jingyi and Jiang Lihua have calmed down, but they are still in a cold war.
The next day, Jiang Yuhua accompanied Jiang Huanxi to the tea restaurant to meet Xu Qingshan.
In Genji Tea Restaurant.
Xu Qingshan ordered a cup of Bear Ice Lemon Tea. While sipping the lemon tea, he looked at the drafts spread out on the table and counted carefully with a pen.
"Qingshan!"
Xu Qingshan heard the sound and looked up.
Jiang Huanxi had a pink face and was running towards him with a bag in his hand, followed by a lady wearing a leather jacket and sunglasses.
This should be Jiang Huanxi's sister-in-law.
The female Ph.D. student studying mathematics at Princeton.
It’s just
This appearance doesn’t look like a normal female doctor, does it?
Wearing a leather jacket, jeans, and sunglasses, he has a slender figure, a perfect waist-to-hip ratio, and graceful curves that are not obtrusive, but he is tall and has long legs, which makes him look very three-dimensional.
Judging from her figure, this young lady should go to the gym a lot.
It's just that this style looks more like someone who plays motorcycles and rock n roll, rather than someone who does math.
"Little Ostrich, are you here? Is this Aunt Yuhua?"
Xu Qingshan put down his pen and stood up to greet him with a smile.
If it was just Jiang Huanxi, then he could be more casual, but his elders were also here, and from Jiang Huanxi's point of view, they were here to help, so Xu Qingshan naturally had to be more attentive.
"Are you Xu Qingshan?"
Jiang Yuhua looked at the tall and handsome young man in front of him, his eyes hidden behind his sunglasses twitching.
"Hello, aunt."
"What aunt? Call me sister!"
"Um sister?"
Xu Qingshan didn't know what was wrong with these little aunts. All of them just wanted to be called sister.
If it was Xu Qingshan in his previous life, Xu Qingshan wouldn't even call her sister when they met, but would directly call her beauty. But the problem is, these aunts are all in front of Tong Tong and Jiang Huanxi!
It’s really mind-numbing.
"Come, sit down, drink whatever you want, eat whatever you want, just order whatever you want."
Xu Qingshan said, cleaning up the drafts on the desktop.
"Whatever? Really?"
Jiang Yuhua looked at other people's dishes around him and sat down. Jiang Huanxi also sat down and looked at his abstract aunt helplessly.
"Sister, don't worry. After all, you are here to give us guidance today."
Xu Qingshan said patiently.
"good!"
Jiang Yuhua stood up and moved his buttocks, sitting on the table next to him.
"Um?"
Xu Qingshan didn’t know why.
"You guys are talking about your business. If you need my help, call me. I'm afraid I'll order too much and the table won't fit. I'll order over here."
Jiang Yuhua's reason was very strong. Xu Qingshan smiled helplessly and looked at Jiang Huanxi.
"Well, little ostrich, it's our turn."
"What do you call a little ostrich!"
Jiang Huanxi touched Xu Qingshan's feet lightly, with a bit of embarrassment on his face.
"Auntie is here."
"Okay, okay, come on, Huanxi, take a look at this first."
"good."
"I ordered you a cup of Bear Iced Lemon Tea just like mine. It's quite delicious."
"Okay~"
Jiang Huanxi took over the draft that Xu Qingshan had been writing for a while and began to look down at it.
The two of them looked at the draft and chatted.
"Actually, I asked you to continue studying number theory because I want you to study the twin prime numbers conjecture with me. Twin prime numbers, also called twin prime numbers, refer to a pair of prime numbers with a difference of 2, like 3 and 5, 5 and 7. , 11 and 13, 17 and 19, etc., these are all twin prime numbers.”
"Uh-huh."
Jiang Huanxi nodded seriously after listening to Xu Qingshan's words.
She didn't know Xu Qingshan's goal, and thought Xu Qingshan just wanted to take her to learn about the twin prime number conjecture.
In order to let Xu Qingshan know that he now knew a lot about number theory, Jiang Huanxi immediately continued.
"The largest twin prime numbers currently are 3756801695685×2^666669-1 and 3756801695685×2^666669+1. Both numbers have 200,700 digits. The twin prime number conjecture is to prove whether there are infinite pairs of twin prime numbers."
"Because the twin prime conjecture and Goldbach's conjecture are sister problems, many mathematicians hope to solve Goldbach's conjecture by solving the twin prime conjecture. At that time, Mr. Chen Jingrun also tried this route."
Jiang Huanxi stated the knowledge he had in earnest, and Xu Qingshan nodded approvingly.
Jiang Yuhua, who was waiting for the meal, curled his lips and did not interrupt.
These two kids were right.
But in the eyes of Jiang Yuhua, a future master in mathematics, this is like a somewhat clever boy who wants to attract his own admiration for him through his interests.
What are twin primes?
Can you, an 18-year-old little boy, solve this problem?
Still studying~
Hmph!
“However, the topic we are going to do today is not the twin prime conjecture yet.”
Xu Qingshan's next words made Jiang Yuhua stop his inner happiness and listen again.
"What we want to study is the weak twin prime conjecture."
Xu Qingshan explained.
“In 1849, the French mathematician Alphonse Polignac proposed the [Polignac Conjecture], that is, for all natural numbers k, there are infinitely many pairs of prime numbers (p, p+2k).”
"When k is equal to 1, it is the twin prime conjecture, and when k is equal to other natural numbers, it is called the weak twin prime conjecture."
"If you are making inferences from finite numbers to infinite numbers, the sieve method has reached its limit."
Xu Qingshan softly introduced the research in this area to Jiang Huanxi.
"In the 1960s, Mr. Chen Jingrun used the sieve method to prove that there are infinitely many prime numbers p, so that p+2 is the product of no more than two prime numbers. However, the sieve method has its own limitations, and we certainly cannot start from it. Start with the sieving method.”
Xu Qingshan's words made Jiang Yuhua's eyes slowly become serious.
This guy doesn't seem to have anything.
Too.
If this kid really has nothing, how could his little Huanxi and little Jingyi have a conflict over her?
interesting.
"So what we have to do is to deduce from infinity to finite, and prove that there are infinite pairs of prime numbers whose difference between the two numbers is less than a finite number."
"This finite number can be no matter how big it is. If we take this step from 0 to 1, the road ahead will be easier."
Xu Qingshan’s words were like thunder.
Jiang Yuhua ignored the waiter who was serving the food next to him and quickly sat back down. He took off his sunglasses and stared at Xu Qingshan. He grabbed the draft on the table and looked at Xu Qingshan's ideas and presets. She looked at the derivation and proof process, her expression was surprised, and she couldn’t open her mouth from ear to ear.
"no?"
"You, a quasi-college student, want to weaken the twin prime conjecture?"
"I mean, you're going to prove a supposed hypothesis?"
Jiang Yuhua had heard of Xu Qingshan's idea.
This idea was proposed by an American mathematician a few years ago, but as the American number theorist Dorian Goldfeldt said, "They assume a conjecture that no one knows how to prove."
Now, a student who just graduated from high school said in front of him that he wanted to prove this conjecture.
"Um."
Xu Qingshan looked at Jiang Yuhua in surprise.
Hey, this sister-in-law is also pretty good-looking. The Jiang family has really good genes!
Jiang Yuhua's face turned a little dark.
Boy, you're boasting too much!
(End of chapter)