Chapter 73 I Don't Want To Go To Heaven
At 8:30 in the morning, the lecture hall was almost full.
Lu Zhou found a seat in the back row and sat down very low-key.
At 8:50, the lecture hall was full, and some people brought stools from the next classroom and sat in the aisle to listen to the lecture.
Not only people from this school, but even people from several colleges next door came over to take classes.
It can be seen that the popularity of this Professor Ren Changming is indeed not small.
At 9:00, the lecture officially started. Looking at the old gentleman on the podium, Lu Zhou became more and more familiar, and always felt that he had a relationship. But it was too far apart, and maybe he had changed his clothes, and he really couldn't remember where he had seen it.
The PPT began to show, and the freshman and elementary school girl sitting next to her finally stopped chatting with her roommate on the other side, and reached into her bag to get her notes and pens.
At this time, when she saw Lu Zhou next to her, she was suddenly stunned.
After taking a few more glances, she asked in a low voice, "Classmate, are you Lu Zhou?"
Lu Zhou was stunned and nodded: "Yes."
The girl's eyes lit up, and she asked in a slightly excited tone, "You...are you Lu Zhou from the first or third class?"
"Yes... is there something wrong?"
"No, it's nothing." The elementary school girl quickly shook her head.
It's okay what are you calling me to do!
Lu Zhou was speechless, opened the notebook and started taking notes.
"..."
Lu Zhou: "..."
I don't know if it was his delusion, but he always felt that the two freshmen and elementary school girls next to him were secretly watching him, and whispered excitedly, pointing and talking in a low voice.
Lu Zhou sighed in his heart.
Is this the trouble with being a celebrity?
Feel……
not bad?
Fortunately, they didn't discuss it for too long, and soon the topic went elsewhere.
Lu Zhou automatically blocked the interference from the outside world and focused his attention on the lecture itself.
It happened that Professor Ren had just finished his opening speech, and he didn't miss a lot of content.
"... We all know that prime numbers are natural numbers with only two factors. You may have memorized the top 100 prime number table when you were in junior high school. Twin prime numbers refer to pairs of prime numbers with a difference of 2, that is, p and p+2 are both prime pairs. For example, 3 and 5, 5 and 7, 11 and 13, 17 and 19, etc. As the number becomes larger, fewer and fewer twin prime pairs can be observed.”
"There are 8 twin prime pairs within 100, and there are only 2 pairs in the interval 501 to 600. As the prime number increases, the next prime number should be farther and farther away from the previous prime number, but it is equally famous as Goldbach's conjecture and An important conjecture asserts that there are infinitely many pairs of prime numbers that differ only by 2, such as 3 and 5, 5 and 7, or even this..."
Having said that, Professor Ren wrote a line of numbers on the blackboard.
[2003663613×2195000-1 and 2003663613×2195000+1]
Looking back, he smiled and continued.
"There are infinitely many prime numbers with a difference of 2, which is the famous twin prime conjecture."
So far, what Professor Ren has said is only superficial knowledge. Even Lu Zhou, who has not studied the twin prime problem in depth, can easily keep up with it.
The same goes for the other freshmen, both amateurs of mathematics and non-mathematics, all listening intently with great interest.
But soon, the content of the lecture began to deepen.
"...The twin prime number conjecture has always been a difficult problem in the mathematics community. But just last year, there was a breakthrough in the research on this problem." Professor Ren smiled, turned to the next page of the PPT, and continued. , "Mr. Zhang Yitang, a mathematician of Chinese descent, proved a weakened form of twin prime numbers and found that there are infinitely many prime number pairs with a difference of less than 70 million, thus achieving a breakthrough from scratch on the road to the important problem of twin prime number conjecture. ."
Having said that, Professor Ren pushed his glasses and wrote Mr. Zhang's proof process on the blackboard on the spot.
[Define theta(n)=lnn, if n is a prime number; define theta(n)=0, if n is a composite number. Take the function lambda(n) = ..., define S1(x) = ..., S2(x) = ...]
[Prove that S2(log3x)S>0...]
【…】
Looking at the increasing formulas on the blackboard, the students who were able to understand before were instantly stunned.
For example, the elementary school girl sitting next to Lu Zhou looked like "Who am I?" "Where am I?" "What am I dictating?" It's as if I only missed a second, but I feel like I've missed the whole world...
Lu Zhou was able to keep up with the ideas of the professor.
In short, that Mr. Zhang cleverly chose a lambda function and successfully proved that for k>=3.5*10^6, the conclusion S2(log3x)S1>0 holds.
In this way, listing the first 3.5*10^6 prime numbers as an acceptable set can further prove that there are infinitely many pairs of prime numbers whose difference is less than 70 million.
"According to the proof method left by Mr. Zhang, as of now, Mr. Zhang's k>=3.5*10^6 has been reduced to k>=50. That is to say, the number of 70 million has been reduced to 246. The remaining The work needs to be done by the latecomers.”
Having said this, Professor Ren smiled and threw the chalk end on the desk, "Maybe, the great person who completed this historic work will appear among all of you present."
"I'm looking forward to that day!"
clap clap clap!
Thunderous applause.
The audience applauded enthusiastically.
Whether you understand it or not, it's time to applaud!
Of course, there were still many people who understood it, and thoughtful expressions appeared on their faces.
For example, Lu Zhou.
The twin prime number conjecture is just an introduction. This semi-popular lecture is not an academic report, but the point is to stimulate students' enthusiasm for mathematics.
Professor Ren talked about the Goldbach conjecture from the twin prime number conjecture, and from the Goldbach conjecture to the current development of domestic number theory and some more cutting-edge research results.
I have to say that this old professor does have some ink in his stomach.
Can talk about some obscure things that even beginners can listen to with relish.
However, the content of the second half of the lecture was much less nutritious than the content of the first half, so that Lu Zhou didn't listen very carefully at all. At this moment, his mind is still stuck on the proof of the twin prime number conjecture.
Recalling the last discovery in the library, Lu Zhou, who was staring at the calculation formula on the blackboard, frowned. He felt that he had discovered something, but he always let it slip from his fingers in the moment he was about to catch it. slip……
The lecture is over soon.
People from the Student Union took the list and went to the first row and started counting sign-ins.
After Lu Zhou signed in, he couldn't wait to rush to the library, but was stopped by the freshman who was sitting next to him just now.
"Senior, senior, wait a minute, that, can you add your buckle?"
Not wanting to waste time, Lu Zhou casually wrote a series of button numbers on the draft paper she handed over, and then didn't give her a chance to continue talking at all, and quickly walked away in the stunned sight of the school girl.
However, as soon as he went out, he was stopped by another person.
This person is none other than Professor Ren who gave the lecture just now.
Judging from the smile on the old gentleman's face, he should have been waiting for him at the door of the lecture hall for a while.
"Hehe, boy, let's meet again."
Lu Zhou: ? ? ?
have we met?
I seem to have seen it somewhere...
Before Lu Zhou could react, the old Mr. Ren continued to speak.
"Young man, are you interested in developing on the rocket?"
Lu Zhou, who was still thinking about the twin prime numbers, was taken aback by this sudden question.
Nima, are you making yourself an astronaut?
How can this work!
Lu Zhou smiled awkwardly: "Uh, professor, I don't want to go to heaven yet."
There is something during the day, today is updated a few hours in advance, and tomorrow will be updated at the old time. Or, when do you think it is appropriate to update? In addition, continue to ask for recommendation tickets~~~~