Chapter 808

"Yang Tian, I want to ask you a question."

Xu Yerong didn't come to class today. When Yang Tian wasn't there, she had been skipping class. Now when she heard that Yang Tian came back, she was excited to come to class.

Then, coincidentally, I met Yang Tian in the corridor.

I haven't seen you for a long time. The girl is still radiant.

A blue dress, delicate lace lining out white legs, slender straight, exquisite curve completely outlined out.

She pursed her lips, drew out her hair, and her fingertips were as lively as elves. Hair across the place also remains a faint aftertaste, intoxicating.

After seeing Yang Tian, the girl carries her little hand and her delicate face is full of bright smile.

"What's the matter?" Yang Tian asked

"Hee hee, just follow me."

Xu Yerong's pretty face with cunning color, can't help but say, took Yang Tian's little hand and ran to a pavilion.

Then he took out a stack of three finger thick A4 paper from his bag, slightly frowned and said: "here, I've been studying this problem these days. I've been calculating for several days and nights, but I still can't work it out. I know you are smarter than me, so I want you to help me."

Looking at Xu Yerong's bright eyes, a few strands of blood appear at the moment, and the eyes become like pandas.

Yang Tian said, "how many days and nights have you been up?"

Xu Yerong broke off her fingers and calculated. Then she said, "it's like three days and two nights. Oh, Yang Tian, please help me. If you don't help me again, I'll be crazy."

Yang Tian had nothing to do, then picked up the above operation file and frowned: "four color theorem? Are you sure it's not funny? Isn't this a math problem? You're a member of the Department of archaeology

Four color theorem, also known as four color conjecture and four color problem, is one of the three major mathematical conjectures in the world.

Its essence is the inherent property of two-dimensional plane, that is, two straight lines without common points can not appear in the plane. Many people have proved that it is impossible to construct five or more connected regions in two-dimensional plane, but they have not raised them to the level of logical relations and two-dimensional inherent attributes.

In short, it is a very difficult mathematical problem, which is at the same level as Goldbach's conjecture solved by Yang Tianzeng.

This little girl still wants to solve it by herself, but she doesn't know that even if she burns her brain, it's impossible to solve it.

Hearing Yang Tian's question, Xu yelong said with a smile: "I joined the math club, and then volunteered to solve this unsolved problem within five days. At that time, I was forced to make a bet. Today is the last day. Yang Tian, you must help me."

Xu Yerong holds Yang Tian's arm in her small hand. She keeps shaking and pouting so that she can hang an oil bottle.

Yang tianhei said: "do you think that I can complete this conjecture?"

"I don't care. Yang Tian, you must help others. They have finished more than half of it. Now they are only one last step away, but they can't break through the proof of this last step. You are smarter than me, and you will think of a way."

Xu Yerong is constantly coquetry to Yang Tian, and a delicate little face rubs against Yang Tian's arms.

Yang Tian felt the delicate body of the girl in his arms, and the fragrance all over his body. He couldn't help but have some determination. He said, "stop, stop, I'll help you."

"Yeah, hee hee, Yang Tian, I knew you were the best."

Xu Yerong smiles brightly and kisses Yang Tian on his side.

That warm touch, with a trace of soft waxy, as well as the bursts of fragrance.

Yang Tian was stunned.

And after Xu Yerong reacts, ah yelled.

This scream almost punctured Yang Tian's eardrum.

He some speechless way: "you kiss me, I didn't shout, you shout what?"

"Big bad guy, that's different. I'm a girl. You can't explain it. I must be crazy. Yang Tian, forget it."

Xu Yerong covered her pretty face, which was almost like blood dripping, and wanted to get into the crack in the ground.

She was just so happy that she didn't pay much attention.

Yang Tian feels funny. However, he just laughs twice and is severely pinched by Xu yelong's little hand.

Yang Tian immediately stopped smiling, and then took a cold breath: "you are really willing to work hard."

"Well, I want you to laugh at me."

Xu Yerong's face gloated, and then took out the paper and pen: "Oh, hurry up, there's no time."

Yang Tian holding his forehead, can only take Xu Ye Rong to write these carefully studied.

Xu Yerong has been holding her cheeks with both hands, sitting on the stone bench, lying on the stone table, with a smile on her face, admiring Yang Tian in this way.

The boy is much smarter than her. He will be able to solve the four color conjecture

After watching for a long time, Yang Tian finally understood the principle of the four color conjecture. What Xu Yerong has studied these days and nights is all wrong. He was about to tell Xu Yerong the news, but found that the little girl was sleepy and sleepy. Yang Tian shook his head and sighed, took off his coat and put it on. He took up his pen and began to calculate. No one in the world has proved this conjecture. It is said that a few decades ago, mathematicians in M country used computers to make 10 billion judgments in 1200 hours. But computer proof can't give convincing thinking process. So, it's still a mountain that mathematics can't climb. And these in front of Yang Tian, but easy. His intelligence is like a demon. He has been cultivating immortals in Xuantian for three hundred years. His soul is a real immortal. It's easy to solve a math problem. When Xu yelong wakes up in a daze, he finds the clothes on his back, and his heart warms. However, when she saw that Yang Tian was lazy there, she glared at her eyes and said, "Yang Tian, you are still not my good deskmate. I asked you to prove the four color conjecture for me. How can you do it?" before she finished her words, Yang Tian took out a piece of paper and stuck it on her forehead and said with a smile, "don't come to me for such a simple topic in the future."“ Oh, what a big tone. " Xu night Rong Jiao hum a, and then gave Yang Tian a white eye, picked up the bright and clean forehead Yang Tian proved good four color guess to see. After seeing Yang Tian's early conjecture, he frowned and said angrily, "Oh, Yang Tian, you've made a mistake. Have you come according to my idea?" Yang Tian said calmly, "all your speculations are wrong." After hearing this, Xu yelong said angrily, "how can it be that the early reasoning was made by the mathematics professors of Peking University for the mathematics society. All the mathematics professors of Peking University participated in it. Do you still think that all the professors are inferior to you?" After thinking about it, Yang Tian nodded and said, "it seems to be." Xu Ye Rong turned her eyes angrily. She took a look at the time, and her face changed again. She said, "Oh, I'm going to the math club right away. You really killed me today. I'll be ridiculed by them when I get there." Then, after tidying up things in a mess, he was about to leave with his bag. Yang Tian helpless way: "four color guess I have demonstrated to you, how do you don't believe it, after you take out what I wrote, absolutely can frighten the whole audience." After hearing the speech, Xu Yerong almost fell down. She said angrily, "I only proved the last moment according to the ideas of those professors at Peking University for two days and three nights. You didn't follow our ideas at all. How could you calculate such a huge workload in just one hour?" The girl said so much, the summary is only four words, I don't believe it. Yang Tian smokes around his mouth. He wasted an hour proving such a complicated math problem. This little girl doesn't believe him. Why did she ask him to help just now? According to Xu Yerong's back, Yang Tian's face is covered with black lines. After that, he called Xiao ling'er and took her to the library to read. The little girl doesn't know how many characters, so she wants to play. She can sleep better than him in class every time. When she teaches her lessons, she pretends to be stupid and poor. Yang Tian has a headache. At the moment, Xu Yerong has finally come to the Mathematics Club. Looking at the door of the Mathematics Club, Xu Yerong really didn't want to push it open. A few days ago, she was inspired by others and threatened that she would prove the four color conjecture after the world's three major mathematical problems. However, the difficulty of the four color conjecture is much higher than expected. In the end, she has no clue. She originally asked Yang Tian for help, but the other party would help her solve it. However, I didn't expect that the other party would only make trouble