Chapter 119: gentleman

Just as Lu Zhou looked at the Indian brother, the Indian brother noticed him.
陆 When Lu Zhou approached, he smiled with a smile on his face, and immediately greeted him with curry-like English.
"Hey buddy, you have a good vision, and you are also in number theory?"
"That's right. It's ... a shocking research result," he barely understood what he was talking about, Lu Zhou glanced at the poster, and looked around again, and found that no one around him looked interested in it. , Could not help asking, "But why is there no one here?"
"Because of the arrogance and prejudice of the" Princetons ", they could not accept that a native Indian defeated them mathematically, and even unreasonably refused to let me come to the stage to report. It seems that friends who are on the ocean side are more capable Understand my mood, "the slightly dark-skinned Indian brother grinned and stretched out his hand." Dean, Master of Nehru University, what's your name? "
Lu Zhou actually wants to say that I do n’t understand your mood very well, because my research results will be exhibited in the form of a report on the fifth day, but I thought about it, so as not to stimulate the foreign friend, The words were in my heart.
"Lu Zhou, Jinling University," without mentioning his degree, Lu Zhou reached out and shook him, and then couldn't wait to ask, "May I see your thesis?"
"The thesis is here, but I recommend you to see the stuff," he patted a stack of paper, Di Jean left it aside, and then moved out a large white board and wrote and painted on it with a marker. After getting up, "The process is a bit cumbersome, but the principle is very simple. You only need to listen to me once, and you will soon understand the mystery of back-calculation."
"Reverse math?" Looking at the Indian brother in surprise, Lu Zhou couldn't help but whisper, "You proved it with reverse math? I thought you were studying algebraic number theory."
"Algebra is only a tool for studying number theory, not the only way ... I know this sentence may make you sound a little upset, after all, your Mr. Zhang has made a good start for the algebraic method to prove the bounded distance of twin primes, and I take This method of proof will mean that he not only walked into the dead end himself, but also brought a group of mathematicians into the grave. "
Lu Zhou said silently: "... I'm not unhappy, can you get on the subject soon?"
Pu Di asked to hang up the blackboard and raised his eyebrows proudly at Lu Zhou.
"Immediately!"
While the Indian brother was writing and drawing on the whiteboard, Lu Zhou noticed that many people set their sights on this side and approached them.
With a curious mind, Lu stood next to the poster and followed the proof of the Indian brother's proof.
In fact, in abstract terms, his thinking is very simple.
First assume that the twin prime numbers are finite pairs, and let the largest twin prime number pairs be (Pn-1, Pn). It can be seen that the prime numbers within Pn are limited and are set to P1, P2 ... Pn-1, Pn.
Then construct a large prime P = (P1P2P3 ... Pn) +1
Obviously P cannot be divisible by all prime numbers from P1 to Pn, and it is always 1, so P is a prime number. In the same way, it can be proved that P-2 = (P1P2P3 ... Pn) -1 is obviously also a prime number, and it will always be 1 divided by any prime number from P1 to Pn.
Since P is a prime number and P-2 is a prime number, the two form a twin prime number.
Then the problem comes. The twin prime number pair formed by P and P-2 is larger than the "maximum prime number pair" originally set, thus negating (Pn, Pn-1) as the largest twin prime number pair.
Is like climbing a ladder, no matter how big (Pn-1, Pn), you can always find a pair of prime numbers larger than (Pn-1, Pn).
Thus, the hypothesis that "the twin prime pairs are finite" is reversed, and conversely, "the twin prime pairs are infinite" is correct.
There are many more processes in between, but the overall idea is this.
Lu Zhou saw the process of listing him on the blackboard from the beginning to the end.
Surprisingly, he did not cite any existing research results to solve this problem.
This kind of thinking outside the framework to find the answer is worth promoting.
But ...
Lu Zhou finally understood why no one ignored him.
"The large prime number P you build can indeed be guaranteed not to be divisible by a series of prime numbers from P1 to Pn, but the prerequisite is that Pn is the largest prime number. Obviously, you fell into a logical trap, how do you prove that Pn is known The largest prime number? "
Didi raised her eyebrows: "Don't you see what I wrote in the first line? In the case of limited twin prime pairs, take the largest pair of twin primes (Pn-1, Pn) ..."
Lu Zhou: "2 3 5 7 11 13 + 1 = 30031."
When I heard Lu Zhou read out this formula, a lot of people appeared in the faces of the crowd watching, and some people had already guessed it already, and now they couldn't help laughing.
There are others ...
Whispered and applauded.
Didi stopped him, feeling something wrong, frowned and asked, "What do you mean?"
Lu Zhou sighed: "30031 can be disassembled into the product of 59 and 509 primes, so this number is a composite number ... Are you Princeton at your own expense? I am your professor, and I will definitely not help you fight Funding. "
There was a whistle beside someone.
"Well, please shut up."
Realizing that he had made a low-level mistake, Di Rang's face turned red and he turned into a pig's liver color. He scolded and tore off the poster, and stuffed the table into the backpack. Someone whistled at him, but he ignored it and slipped quickly without looking back.
Lu Lu shrugged somewhat helplessly.
In fact, he also wanted to tell the Indian brother, from the perspective of mathematical logic, why can't we set (Pn-1, Pn) to be the largest prime number pair, but the Indian brother obviously did not intend to give him the opportunity to point, and only Can do nothing.
There is no excitement to watch, and the crowd quickly dissipates.
Only one person stayed, looking at him with a smile.
I looked at this, and Lu Zhou found some familiarity.
I didn't even change my clothes. It was the blonde sister who took him to the hotel yesterday.
Seeing Lu Zhou look at himself, Molina raised her eyebrows and said with a smile, "I killed a player on the first day?"
Lu Zhou helplessly spread his hand: "I just pointed out his mistake, is there any problem in doing so?"
"No, similar things are happening every moment," Molina said with a bent corner. "Here is the" arrogant "Princeton. To show his research results here, he needs more than just an agile mind. The brain must have a heart that is strong enough to bear it ~ EbookFREE.me ~ Obviously, she heard the conversation between the two of them from beginning to end.
I really have a bad taste ...
Lu Zhou didn't even notice when she was standing here.
Seeing that Lu Zhou was silent, Molina continued to ask, "Are the formulas you came up with at the scene? Or are you ready in advance to come and attack him?"
"Just think about it, should it be easy for Princeton's genius?"
Lu Zhou is not bored to this extent, he is not studying math to find fault everywhere.
Molina raised her eyebrows slightly: "You may have some misunderstandings about the word genius. The stronger expression of the human brain than the computer is in logical thinking and creativity, not in the calculation of floating point numbers. If his research group has a Someone who knows a little about computers will help him exhaustively search for possible counter-examples, and he will not run a long way to make a joke here. "
Lu Luzhou: "But if not right?"
"Yes." Morina pouted and smiled, and somehow she touched a chewing gum. "Are you going for a slice?"
He hesitated, and Lu Zhou reached out and pulled out a piece.
"Thank you ..."
Although someone told him not to accept food from strangers when he was a kid, it should be fine here, right?
Seeing Lu Zhou accept chewing gum, Molina pouted and smiled.
"You're welcome, since you received my little gift, then in exchange, I hope you give me your e-mail address and FB account."
"I can give you an e-mail address. I don't have an FB account ... is it a custom in any country?"
Speaking about halfway, Lu Zhou suddenly felt like he was being tricked.
Molina smiled and said in a joking tone, "No, this is a gentleman's manner."