Urban: I Got a Space-Time Mailbox and I Can Write to My Past Self

Lin Xian chose to rely on the competition to go to the United States, the main consideration is efficiency.

If you want to go, it is also a shield, a visa, and your luggage will have to be checked. Maybe you will be deliberately knifed!

In short, too much trouble.

It's too dangerous.

In case the people entering and exiting over there are unreasonable and seize their luggage. Without the space-time mailbox, my own life game is basically over.

But if there is a country to back it up, it will be completely different.

The national team must be escorted by the country.

Whether it's formalities or safe transit, it's a piece of cake.

Safety.

Your own safety and the safety of the mailbox.

This is what Lin Xian needs most.

Lin Xian patted the red i-color post box:

"Good luck, brother, you can also go abroad for a lap."

certainly.

In addition, there is another important reason.

It's money.

U.S. knife.

For a fugitive such as Wen Ling, if she wanted to be drawn out, it would not cost millions of dollars.

After all, Wen Ling came to see him, which meant revealing her identity, which was very dangerous for her.

And Lin Xian has all the money now, after buying the car, there are more than 10 million left.

It's not much to change all to US knives.

"If you can do it with other people's money, why use your own money?"

With a bonus of 100 million dollars, 10 million dollars were used to attract Wen Ling, and he still had 90 million dollars left.

Using American money to help the people of Longguo, I still have a lot left.

Bargain!

the other side.

Curator Wu slipped and fell directly in the corridor because he was too excited.

The phone flew far away.

He looked around, but fortunately no one saw it!

Then he got up, patted his body, and checked the phone:

"Mr. Lin, I heard you right? Did you drink today?"

Lin Xian smiled slightly:

"Curator Wu, if I called you a week ago and said I have the original "Dream of Red Mansions", do you think I drank too?"

This sentence directly questioned Director Wu.

He hurriedly laughed:

"Hahaha, Mr. Lin, you misunderstood, I am not that you believe you. It's just that this [Goldbach's Conjecture] can be called the number one problem in mathematics, the ceiling of mathematics, and I can't believe it for a while.

"Also, forget it, I'll just tell you. Every day countless people claim to prove Goldbach's conjecture, but it's actually because of their ignorance. I also worry that you are inspired by the moment."

Although Director Wu's professionalism is not right.

But [Goldbach's conjecture] this name is a little heard by everyone.

Since it was proposed 300 years ago, countless mathematics geniuses failed their youth and wasted their lives, but they couldn't solve the answer until they died.

[Goldbach’s conjecture] is the ceiling of mathematics,

Is the end of mathematical theory,

It sounds simple and easy to understand, but it can't be proven anyway.

Who can prove [Goldbach’s Conjecture], then he will undoubtedly ascend to the golden throne of mathematics and become a great mathematician with the same reputation as Newton, Descartes, and Gauss.

It is worth mentioning that Gauss, known as the "Prince of Mathematics", also failed to prove [Goldbach's Conjecture].

As for Newton and Descartes, they were lucky, born early and died early, and escaped.

......Curator Wu entered the room and sat on the sofa:

"Mr. Lin, I believe in your character. I will call you Professor Dingyi now. When do you think you have time?"

Lin Xian didn't want to embarrass Director Wu too.

He could think of how the other party would laugh at him when Director Wu called Professor Ding Yi later.

Needless to say, Professor Ding Yi absolutely does not believe that a "folk mathematician" in his 20s can prove Goldbach's conjecture.

So Lin Xian said:

"Look at when Professor Ding Yi has time, and when he has time, I will arrange the itinerary to go to the imperial capital."

After hanging up, Lin Xian took out Einstein's manuscript.

There are three parts in the manuscript.

The first part: Prove Goldbach's conjecture (3 pages).

The second part: the controllable nuclear fusion equation (7 pages).

The third part: the cosmological constant (1 page).

Lin Xian took out the top 3 pages.

Then continue to hide the remaining manuscripts.

Before meeting Professor Ding Yi, he must figure out this thing thoroughly.

He doesn't need to be too thorough, he may not explain the details, but some important derivation formulas must be written down?

"Fortunately, Goldbach's conjecture is not difficult to understand, otherwise there would not be so many private mathematicians to challenge it.

Goldbach's conjecture itself is very simple, ordinary people can confirm 760 at a glance--

It is right.

Its content is: "Any integer greater than 2 can be written as the sum of three prime numbers."

However, due to subsequent changes in the rules of mathematics, the convention "1 is also a prime number" is no longer used.

Therefore, after 1 was expelled from the prime number, Goldbach's conjecture also had a new statement version -

"Any integer greater than 5 can be written as the sum of three prime numbers."

It's just that the way of presentation has changed.

Nothing has changed in essence.

Lin Xian made himself a cup of coffee and prepared to read the night at night.

"It's been a long time since I studied hard like this! This account must also be recorded on Liu Yiyi!"

Lin Xian, who loves to use bad pens, took out a small book on the spot and wrote on the first page:

Liu Yiyi owes Lin Xian one night to study.

After thinking about it carefully, Lin Xian crossed out the words "study time" again.

"I spend my time studying, but when Liu Yiyi pays off the debt, he doesn't have to study to pay it back!"

Put the notebook well, Lin Xian began to concentrate on studying.

The more basic the problem, the more difficult it is to answer.

But the answers to these questions are very simple. Sometimes it's just a question of thinking, but everyone can't think of it.

Professor Ding Yi once said when he was studying the mathematical model of ball lightning II:

"Sometimes, it's not that we think the problem is not complicated enough, but that it is not simple enough.

This sentence is very famous, and was later written into the book by a science fiction writer.

"Okay, okay, I don't want to be messy, study!'

That night, Lin Xian picked up the lamp and learned hard until 3 o'clock in the morning.

The progress is about 20% clear.

For some professional terminology and professional formula derivation methods, Lin Xian also needs to check information online and watch courses to learn.

The good news is: Lin Xian does not need to learn all the theories thoroughly, he only needs to learn a certain formula.

The bad news is: just a formula is difficult

Before going to bed, Lin Xian sent a message to Lao Zhang, saying that he would not go to the company next week, and that he would go to the U.S. competition, so he could help watch.

Unexpectedly, Lao Zhang didn't sleep either, and directly replied to WeChat.

Lao Zhang: Don't worry, Lin Xian! You are a big business person, you can't stay here all the time. Go up when you have the chance, brothers are happy to send you!

Lao Zhang: Your team members are very capable. If you exceed the schedule, you can command remotely.

It's late.Turn off the lights and sleep.

After waking up the next day, Lin Xian received a call from Director Wu.

Curator Wu said lightly:

"Professor Ding Yi will rest for half an hour after dinner every day. He said that he can meet you between 7:30 and 7:30 the day after tomorrow."

Lin Xian nodded:

"Thanks to Director Wu, I will remember your kindness."

"Haha, what are you polite."

Then the two hung up the phone.

Lin Xian could feel that Professor Ding Yi didn't pay much attention to this meeting.

Even...

I don't want to meet myself at all.

But Lin Xian doesn't blame him. If he is Ding Yi, he will not believe that a young man in his 20s can solve Goldbach's conjecture.

This precious half an hour must have been won by Curator Wu after a long time.

The night after tomorrow

I can study for another day today!

"Study hard! Study hard!"

With the foundation of the first day, great progress has been made today.

Einstein took Lin Xian's mathematics into consideration, so he wrote "It's easier to understand".

After a little study, some things are not difficult to understand.

Lin Xian studied continuously for more than ten hours.

It is already 10 o'clock in the evening.

He has understood 80% of the proof process of Goldbach's conjecture.

Fortunately, the proof process written by Einstein is very complete. When a few formulas and derivation processes are memorized, those mathematicians can understand it at a glance.

"Forget it! Now that you have mastered 80%, just stay up all night and understand everything!

"If you sleep, you can go to the plane to catch up.

Lin Xian drank two cups of coffee.

Research overnight.

Finally at 2 o'clock in the middle of the night, I completely mastered all the proof process!

"Einstein Bull P!"

After Lin Xian understood all the proof process, he really felt how non-human Einstein's mind was!

It's just an alien!

Lin Xian sets an alarm clock at 9 o'clock (cafd) and takes a nap

After waking up at 9 o'clock, Lin Xian began to pack his bags.

Because it takes a long time to go abroad, there are a lot of things to bring.

A large suitcase was packed full, and a bag was on his back.

The purpose of the backpack is to put time and space mailboxes.

When flying by plane, the luggage must be checked.

Lin Xian is not at ease, he must ensure that the space-time mailbox is by his side.

Drive to the airport parking lot and board the plane.

After arriving in the imperial capital, Director Wu arranged for someone to pick him up. At 7pm, Director Wu took Lin Xian and showed up in the dining room of Peking University University on time.

Professor Ding Yi was sitting at a dining table.

Apparently just finished eating.

The table and chopsticks have been cleaned up by the service staff, and now there is a cup of tea on the table.

Although Ding Yi is very old, he is extraordinary.

Nowadays, in Longguo mathematics circle, he is a well-deserved leader, and he is also the captain of the team of this World Mathematics Masters.

Although the four members of the representative team have not yet been determined, the captain has already been determined.

"The young man has something to do!"

When Professor Ding Yi saw Lin Xian coming, he moved to shake hands:"Curator Wu introduced you to me, and he was brave enough to act righteously, and he turned in cultural relics. Your behavior makes me admire. What Long Kingdom needs most is a young man like you!

Lin Xian is not clear.

The reason why Director Wu was able to persuade Professor Ding Yi to spare precious time to see Lin Xian was that Ding Yi was impressed by the two things of being brave and handing in cultural relics.

Ding Yi always believes that all research and science serve humanity to live and work in peace and contentment. To conduct research, character is the first!

The second is talent and hard work.

So he admires Lin Xian very much, even if Lin Xian is an ordinary college student who "thinks he has proved Goldbach's conjecture".

Ding Yi was also willing to waste half an hour to meet him.

Although Lin Xian does not know the truth, he can also understand Director Wu’s difficulties and Professor Ding Yi’s actual attitude.

So I don't have ink marks, and I just handed over a manuscript:

"Professor Ding, your time is precious, so I'll be straight to the point. This is the derivation process I used to prove Goldbach's conjecture. Please have a look."

The content of this manuscript is almost exactly the same as Einstein's original manuscript.

But it was all "remembered" by Lin Xian.

So the handwriting is Lin Xian.

Professor Ding Yi took the manuscript with a smile, took out his glasses from his pocket and put on:

"You are a refreshing young man, so I will just say it straight. Since the United States announced that it will host the [World Mathematics Masters], at least dozens of people have asked me to give me a message, and they have proved themselves [Goldbach’s conjecture] 】.

"But you probably know the result. It's all academically inaccurate, knowledge is shallow, and there is no real understanding. What I wrote is some elementary school formulas like n(n-2).

"So, if I bring you an error later, don't be surprised. After all, academic problems are normal.

Lin Xian smiled calmly and motioned to Professor Ding Yi to please.

Curator Wu sat aside without any expression.

He believes in Lin Xian's character, but does not believe in his academic level, which is also very contradictory.

Ding Yi began to concentrate on Lin Xian's manuscript.

At the beginning.

Ding Yi's expression is still very relaxed.

Leaning on the backrest, shaking Erlang's legs to read the manuscript.

But slowly

His expression began to become serious, and his eyes opened a little:

"Ouch, boy, you can think of this step, you have a good level."

"When Senior Chen Jingrun tried to prove, he also used this step. It seems that you still did some homework."

Ding Yi sat up, moved a bit, and began to check it formally.

The more it looks.

The frown becomes tighter.

Even the breathing became rapid.

......

"How did you come up with this step? Boy, if I didn't guess wrong, you should be a PhD student?"

"Who is your mentor? Speak out and listen, I must know him!"

Ding Yi stared at Lin Xian, ready to hear the name of an old friend.

But Lin Xian smiled slightly and still did not speak.

Ding Yi understood, patted the manuscript, and said to Curator Wu:

"Old Wu, I just said, with such a powerful mentor, why should I ask you to recommend it?"

"I understand this. Which friend of mine is this, who came to me on purpose to show off!"

"It's nothing more than to anger me and show that I have accepted a genius apprentice! Let's talk about Lao Wu, who is Lin Xian's tutor, and who asked you to recommend it."

Ding Yi "thought himself" that he was right.

He saw the derivation formula in Lin Xian's manuscript. This derivation level must be the top level in the domestic mathematics circle!

The top people are none other than those, he knows them all.

So Ding Yi guessed that Lin Xian's age must be a graduate student and doctoral student led by "a certain top person".

This time I came here just to show off for myself!

At their age.

What I love most is not how good I am.

It's how awesome his apprentice is!

This group of them will not die and will not survive for 20 years. If they don't accept a good apprentice, who will inherit their mantle?

However, Director Wu smiled helplessly:

"Where is there any mentor? If Lin Xian has this background, I still need to introduce him?"

Professor Ding Yi pushed the glasses.

He didn't believe what the two said, but since the two of them didn't speak, there was no way.

He had to continue to check the manuscript.

Finished reading the first page.

Both are very "basic" derivations.

He turned to page one-

Frown!

"this "

He couldn't understand it for a while!

He changed his sitting posture again, put the manuscript on the table, and began to gesture on the table with his fingers.

The more I look, the more headaches become.

The more I look at it, the more sweat is on my forehead.

He looked up suspiciously, and looked up and down Lin Xian, his eyes were full of doubts, shocks, surprises, and can't believe them.

I saw Lin Xian still in that pose and expression.

He was sitting on a chair with his arms crossed, with Erlang's legs upturned, with a smile.

Ding Yi was a little bit big.

He continued to read the manuscript.

After a while, I was sweating profusely!

Bang!

He slapped the table!

Take the thermos cup and stand up.

"go!"

Curator Wu was taken aback:

"What are you doing?"

"Keep watching from another place."

Curator Wu made a cut and murmured:

"Where can't you see it?"

But the body is still honest, he just got up, ready to keep up with one-

Ding Yi pushed him back to the seat:

"You can't come, you are sitting here."

"Why can't I go!" Curator Wu was unhappy.

Ding Yi turned his head and looked at him sternly:

"Old Wu, what happened today, if you go out of this door, you will completely forget it! No one can say it!"

When Curator Wu saw Ding Yi's expression, he was also a little panicked:

"What? What's the matter so serious."

"Stop asking!"

Ding Yi looked around at no one, leaned in the ear of Curator Wu, and whispered:

"This will be the highest-level state secret in the near future! It has a bearing on China's international status!"

"Xiao Wu, don't blame me for not reminding you, be careful of your position!"

After speaking, Ding Yi changed his attitude, walked in front of Lin Xian, and opened the restaurant door:

"Mr. Lin, please! Let's go to my office and talk in detail."

Lin Xian nodded and walked out of the restaurant with Ding Yi.

Curator Wu scratched his head.

He understood that Professor Ding Yi was definitely not alarmist.

People who do mathematics don't play the fake set.

Director Wu suddenly woke up!

"Difficult, is Lin Xian really!!"

Well!

Curator Wu hurriedly covered his mouth!

This matter can never be said!

He just went to the largest hall in the imperial capital for a meeting a few days ago

It was a top conference specially held for the [World Mathematics Masters].

At the meeting, the competition system was explained in detail--

The two sides competed, with 5 representatives on each side, for a total of 5 games.

Each contestant brings his own question and shows it on stage. More than 100 judges from all over the world will judge the winners or losers.

The topics prepared by these contestants are top secret by the country!

If you let the other party know

Everyone understands Tian Ji's horse racing principles.

They can arrange for the weakest person to fight against the strongest person in the Dragon Kingdom.

In this way, Long Guo wasted a chance to win in vain!

"Call"

"Fortunately, fortunately, I only called Professor Ding Yi."

"Mr. Lin, please!"

Ding Yi opened the door for Lin Xian and reached out to invite him into the office.

By now, neither of them had to pretend.

They are tacit.

The derivation formula of this proof is absolutely correct!

The puzzle that has plagued the global mathematics community for 300 years has finally been solved today!

Ding Yi poured Lin Xian a cup of tea, then ran to the desk and sat down:

"Mr. Lin, you first have a cup of tea and play with your mobile phone, I will check the calculations again!"

After that, he bowed his head and began to write wildly.

Lin Xian really couldn't laugh or cry after hearing this.

Before, he was still a young man and a lad called himself.

This オ for a while.

It becomes Mr. Lin, you, please.

......

Ding Yi’s calculations took more than an hour.

Finally he slapped the table and sighed!

"It's an eye-opener!! There is such a wonderful derivation formula in the world!"

"This idea is too powerful! This is a derivation idea that has never been tried, or even dared to think about it!"

"Mr. Lin, it's unbelievable! You are definitely an unborn mathematics genius! Please forgive my attitude just now, and I also believe that no one in Quan Long Nation or the whole world deserves to be your tutor!"

Ding Yi finished talking excitedly, wiped his sweat with a handkerchief, ran to Lin Xian and held Lin Xian's hand:

"Mr. Lin! Please be sure to participate in the [World Mathematics Masters]! Your manuscript, regardless of which opponent you encounter, is absolutely unanimous!"

"The Goldbach Conjecture, which has not been conquered for 300 years and the ceiling of the mathematics world! You are the winning trump card of the Dragon Kingdom! Please join us and show our country's prestige! Let the Dragon Kingdom set a monument on the world stage of the mathematics world!

It can be seen that Ding Yi is very excited.

Not only incoherent.

Started to recite words.

But this is what Lin Xian expected.

Maybe ordinary people don't understand, what's the point of proving [Goldbach's conjecture].

This is called fearlessness of the ignorant.

Only the world's top talents can understand what a great feat this is.

Lin Xian reached out and shook hands with Ding Yi, smiling:

"The great man is for the country and the people. I came because the country needs me.

Professor Ding Yi is in awe!Afterwards, the two agreed that this matter must not be leaked out.

Lin Xian wants to prove [Goldbach's conjecture] this matter, only two people know about it.

"Lin Xian, Tian Ji's horse racing story, you should have heard it?"

Lin Xian nodded, this is the story written in the Chinese textbook:

Tian Ji, the general of Qi, often raced horses with the princes of Qi, setting heavy bets.

Sun Bin found that their horses are all about the same foot power, and horses are divided into upper, middle and lower grades, so he said to Tian Ji: "Just place a big bet, and I can let you win.

Tian Ji believed and agreed to him, betting with King Qi and the other princes with a thousand dollars.

The race is about to start, and Sun Bin said: "Now use your lower horses against their superior horses, your superior horses against their middle horses, and your intermediate horses against their lower horses."

After the three games, Tian Ji lost one game and won two games, finally winning Qi Wang's daughter bet.

Therefore, Tian Ji recommended Sun Bin to King Qi Wei. King Qi Wei asked him about the art of war and made him a military division.

This is the reason why each topic must be hidden.

What I am afraid of is that the opponent will use a cannon fodder player to play against Lin Xian, and let the Dragon National team waste a general!

"Mr. Lin, the World Mathematics Masters, although nominally it is open to the whole world, in fact, only the Long Kingdom and the United States participated in it."

"Other countries are basically vassals behind the two countries, or watch the fire from the other side, want to see which country is the real pinnacle of mathematics!"

"Mathematics is the foundation of science, and science is the primary productive force. This competition, on the surface, is a mathematics competition. In fact, it is a competition for the scientific strength of big countries! The winning country will definitely reshape the world structure!"

Professor Ding Yi was eloquent and sweated again.

He wiped his sweat with embarrassment, sorry and smiled:

"I'm sorry, I'm so excited. Mr. Lin, if you have any requests or ideas, feel free to put them forward!"

Lin Xian also didn't pretend to be polite, and directly asked the question he cares about most:

"When I go to the United States, my schedule is definitely limited. But after the game, can I move around freely? I want to meet an old friend in the United States."

Ding Yi laughed after listening:

"Mr. Lin, you are an adult, and you are not a middle school student going to participate in the Olympiad. After the competition, you can do whatever you want, and everyone will have two days of free time."

Lin Xian nodded, and the two reached a consensus.

Professor Ding Yi made a call.

Then a few people in suits and leather shoes came to salute and escort Lin Xian into an unlicensed car.

The car drove to a place where you can't name it.

In the days to come, Lin Xian will stay here.

Two days later, an important news was broadcast on the evening news network.

Announced the members of the [World Mathematics Masters] Dragon Kingdom team.

Photos of five people are lined up and listed on the big screen.

The hosts broadcast one by one:

"They are one-"

"Academician of Longguo Academy of Sciences, Dean of Peking University School of Mathematics, Professor Ding Yi."

"Academician of the Longguo Academy of Sciences, Director of the Academy of Mathematics, Academician Qi Li.

"Huaqing University doctoral supervisor, famous national mathematician, Professor Wang Tanqing."

"The chief researcher of Longke University, the first prodigy of the Long Kingdom, Mr. Liu Lu.

"Honorary Dean of the Palace Museum, Donghai City sees righteousness as a young man, Mr. Lin Xian.

puff--

In the No. 1 villa of Longhu Villa Group in Donghai City.

Dai Chuchan spewed out a mouthful of rice!

"Dai! Chu! Cicada!" Li Ruoying roared.

Whenever mom calls your full name, something big must happen:

"There is no way to eat! There is no way to learn! You spray a table to let others eat!"

Dai Chuchan wiped his mouth and ran to the TV.

Stare at the last photo.

"My! God! Ah!! Mom, isn't this the senior Lin Xian! What is he doing? To participate in the World Mathematics Masters?"

"Hahahahahahahahaha!!! I really laugh at me!!

Dai Chuchan was rolling on the ground with a smile, and his stomach hurts!Li Ruoying saw this scene, inner angina,

pt..

80% of this girl couldn't get married, so she smashed her hands.

He is in his twenties, and he doesn't look like an adult at all.

Dai Shuangcheng's chopsticks were also in the air at this time, blinking inconceivably:

"Is it a mistake? Lin Xian majored in computer science at university. Does he understand mathematics?"

"Dad, this is news broadcast! Do you think there is a possibility of making a mistake?

"Then this may only be a mistake! Why did the country engage in such an important game, let Lin Xian go as a layman, wouldn't it harm Lin Xian! By then, I would lose someone to the country, how would people scold him after returning to China? ?"

Li Ruoying gave the father and daughter a white look, and said disgustingly:

"Only you two can! There are so many experts and professors in the Academy of Long Science, don't you know better than you two?"

"Since the country has asked Lin Xian to participate in the competition, it must be because of my Lin Xian, it's not that Lin Xian really has that level!"

Dai Shuangcheng and Dai Chuchan looked at each other, but did not speak.

The father and daughter have already seen it.

There is a traitor in the house!

Li Ruoying is now Lin Xian's middle-aged fan. No matter what Lin Xian does, she thinks it is right and reasonable.

Even if someone runs over and tells her:

"Auntie! Lin Xian just let out a fart and flew directly to the moon!"

Li Ruoying will also straighten up proudly:

"I knew Lin Xian must have done a lot! This is not much better than the spaceship rocket? My Lin Xian is the first person to fart to the moon!"

Dai Chu stopped eating and ran directly to the room.

Take out the phone and send a message to Lin Xian:

"Senior Lin Xian! You really want to participate in the World Mathematics Masters!!

In an instant, she received an automatic reply.

"We can't contact you for the time being in preparation for major events. I will reply to your message later."

It seems that Lin Xian's mobile phone is also protected for safety and confidentiality and fear of eavesdropping.

"Hey "

Dai Chuchan sighed.

She suddenly felt an inexplicable sense of loss.

feel …

I am really far away from Lin Xian's senior..

I laughed and joked every day, just like a child.

But Lin Xian, senior

It is also to act bravely and make contributions to society.

It is also handing in cultural relics to contribute to the country.

It is also to participate in the world mathematics master, to contribute to the progress of the world.

"I really don't match up at all."

Dai Chuchan held the phone tightly.

Tears like broken pearls, ticking down on the screen.

The gap is so far

She has not graduated and has not yet entered the society.

Lin Xian had already rushed to the place where she could not be expected.

Such a long distance.

How does this make her chase?

"I really want to be like you to benefit society and change the world.'

Dai Chuchan clicked on Lin Xian's WeChat profile picture and looked at the handsome and familiar face.

The aggrieved tears ticked down:

"But I'm just a girl!"

"to me "

"My world is your heart".

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