Chapter 119 Gentleman's Demeanor

Just when Lu Zhou looked at the Indian brother, the Indian brother obviously noticed him.

When Lu Zhou approached, he smiled like a spring breeze on his face, and immediately greeted him in curry-flavored English.

"Hey, buddy, you have a good vision, and you are also in the direction of number theory?"

"That's right. It's...a shocking research result," Lu Zhou barely understood what he was talking about. He glanced at the poster, looked around, and found that there was no one around who was interested in it. , and couldn't help asking, "But why is there no one here?"

"Because of the arrogance and prejudice of the 'Princetonians', they couldn't accept that a native Indian beat them in mathematics, and even refused to let me give a report for no reason. It seems that friends on the same side of the ocean are better able I understand how I feel," the dark-skinned Indian guy grinned and stretched out his hand, "Dirang, a master's student at Nehru University, what's your name?"

Lu Zhou actually wanted to say, I don't quite understand your feelings, because my research results will be exhibited in the form of a report meeting on the fifth day, but after thinking about it, in order not to irritate this foreign friend, I still put this The words were held in my heart.

"Lu Zhou, Jinling University." Without mentioning his degree, Lu Zhou reached out to shake his hand, and then asked impatiently, "Can I read your thesis?"

"The thesis is here, but I recommend you to read it," clapping a stack of paper on his hand, Di Rang threw it aside, then moved out a large whiteboard, and wrote and drew on it with a marker "The process is a bit cumbersome, but the principle is very simple. You only need to listen to my explanation, and you will soon understand the mystery of inverse mathematics."

"Reverse mathematics?" Lu Zhou looked at the Indian boy in surprise, and couldn't help complaining, "You proved it with reverse mathematics? I thought you were studying algebraic number theory."

"Algebra is just a tool for studying number theory, not the only way... I know this sentence may make you sound a little uncomfortable. After all, your Mr. Zhang made a good start for the algebraic method to prove the bounded distance of twin prime numbers, and I take The set of proof methods proposed will mean that he not only walked into a dead end by himself, but also walked into the grave with a group of mathematicians."

Lu Zhou said speechlessly: "...I'm not upset at all, can you get to the point quickly?"

Di Rang hung up the blackboard and raised his eyebrows proudly at Lu Zhou.

"It will be ready soon!"

While the Indian boy was writing and drawing on the whiteboard, Lu Zhou noticed that many people were looking at this side with interest and approaching it.

With a curious heart, Lu Zhou, who was standing next to the poster, followed the Indian brother's proof of thought.

In fact, from an abstract point of view, his thinking is very simple.

First assume that twin primes are finite pairs, and set the largest pair of twin primes to be (Pn-1, Pn). It can be seen that the prime numbers within Pn are limited, and they are set as P1, P2Pn-1, and Pn.

Then construct a large prime number P=(P1P2P3**Pn)+1

Obviously P cannot be divisible by all prime numbers from P1 to Pn, and it will always have a remainder of 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 divided by 1 when divided by any prime number from P1 to Pn.

Since P is a prime number and P-2 is also a prime number, the two form a pair of twin prime numbers.

Then the problem comes, the twin prime pair formed by P and P-2 is larger than the "largest prime pair" originally set, thus negating (Pn, Pn-1) as the largest twin prime pair.

Just like climbing a ladder, no matter how big (Pn-1, Pn) is, you can always find a pair of prime numbers larger than (Pn-1, Pn).

Thereby overturning the conclusion in the hypothesis that "the pair of twin prime numbers is finite", and conversely "the pair of twin prime numbers is infinite" is correct.

There are still many intermediate processes, but the overall idea is like this.

Lu Zhou saw the process he listed on the blackboard from beginning to end.

Surprisingly, he doesn't cite any existing research to address this question.

This idea of ​​jumping out of the frame to seek answers is worth advocating.

but……

Lu Zhou finally understood why no one paid attention to him.

"The large prime number P you construct 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 have fallen into a logical trap. How do you prove that Pn is known? largest prime number of ?

Di Rang raised his eyebrows: "Didn't you see what I wrote in the first line? In the case of limited pairs of twin prime numbers, take the largest pair of twin prime numbers (Pn-1, Pn)..."

Lu Zhou: "2*3*5*7*11*13+1=30031."

When Lu Zhou read out this line of calculation, many people in the surrounding crowd showed a hint of surprise on their faces, and some people obviously guessed it a long time ago, and they couldn't help but chuckled at this moment.

there are people...

They clapped their hands softly.

Di Rang was stunned, feeling something was wrong, frowned and asked, "What do you mean?"

Lu Zhou sighed: "30031 can be disassembled into the product of two prime numbers 59 and 509, so this number is a composite number... Did you come to Princeton at your own expense? If I were your professor, I would definitely not help you fight for it." expenses."

Someone nearby whistled.

"Okay, please shut up."

Realizing that he had made a low-level mistake, Di Rang's face flushed into a liver color, and he tore off the poster cursingly, and stuffed the things on the table into his backpack. Someone nearby whistled at him, but he ignored it and quickly slipped away without looking back.

Lu Zhou shrugged helplessly.

In fact, he also wanted to tell the Indian brother, from the perspective of mathematical logic, why it cannot be assumed that (Pn-1, Pn) is the largest pair of prime numbers, but the Indian brother obviously does not intend to give him a chance to give advice, and only can give up.

There was no excitement to watch, and the crowd quickly dispersed.

Only one person remained, looking at him with a smile.

Looking at this person, Lu Zhou found something familiar.

He didn't even change his clothes, it was the blond lady who took him to the hotel yesterday.

Seeing Lu Zhou looking towards her, Molina raised her eyebrows and said with a smile, "Did you kill a contestant on the first day?"

Lu Zhou helplessly spread his hands: "I just pointed out his mistake, is there any problem with doing so?"

"No, similar things are happening all the time," Molina curled her lips, "This is the 'arrogant' Princeton, and it takes more than a quick-thinking mind to show your research results here. The brain must also have a heart strong enough to withstand it.”

Obviously, she heard the conversation between the two of them from beginning to end.

It's really funny...

Lu Zhou didn't even notice when she was standing here.

Seeing that Lu Zhou didn't speak, Molina continued to ask, "Did you come up with the formula on the spot? Or did you prepare it in advance and come here to snipe him?"

"Come to think of it, it should be easy for a genius at Princeton?"

Lu Zhou is bored to such an extent, and he didn't learn mathematics to find faults everywhere.

Molina raised her eyebrows slightly: "You may have some misunderstandings about the word genius. The power of the human brain over computers is reflected in logical thinking and creativity, not floating-point calculations. If his research group has a Someone who knows a little about computers can help him find possible counterexamples, so he won't come all the way here to make a joke."

Lu Zhou: "But there is no if, right?"

"Yes." Molina pursed her lips and smiled, and found a stick of chewing gum out of nowhere, "Would you like a piece?"

After hesitating for a while, Lu Zhou reached out and took out a piece.

"thanks……"

Although he was told not to accept food from strangers when he was a child, he should be fine here, right?

Seeing Lu Zhou accept the gum, Molina pursed her lips and smiled.

"You're welcome, since you have accepted my little gift, in exchange, I hope you will give me your email address and FB account."

"I can give you an email address, but I don't have a FB account... Speaking of which country is this custom?"

Halfway through, Lu Zhou suddenly felt like he had been tricked.

Molina smiled and said in a joking tone: "No, this is gentlemanly."

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