MTL - Genius Fundamentals-Chapter 187 Graph Theory

When Lao Lin came home from class, Lin Chaoxi had been sitting in the yard for a long time. Although the mosquito coils were scented, many of the bags were bitten by the mosquitoes.

In the yard, the green smoke, the old Lin pushed the bicycle, was surprised: "What is this, bathing incense ready to be a monk?"

"Do you know what happened to your family?" Lin looked up and asked.

"How?" Lao Lin stopped the bicycle, took off the nightingale hanging on the faucet, and took the stone table in front of her.

It was two pieces of roasted cold noodles, and Lin Chou opened a disposable chopstick and poked it.

"I took an injection when I went to the hospital today..."

"A fight again? The parents also took you to the injection, which is quite qualified." Lao Lin interrupted him.

Lin Zhaoxi: "What is ‘又’, and what are you going to do to find a parent for me?”

"Do you want to find something to do with him?" Lao Lin opened the cold noodle lid. "When the hospital is injection, what about it?"

"I saw him talking to an oncologist."

"Oh, his mother is in advanced breast cancer." Lao Lin said calmly.

Lin eagerly looked up: "Do you know?"

In the memory of Gao Lin, there is no exact news about how exactly he is, and Lao Lin never told her.

"Yeah, I know that it is only you who don't care about my big apprentice."

Lin Chaoxi recalled what he was doing during the period before and after the start of school, and he was speechless.

"I'm sorry," she said.

"Okay, I don't expect you to be too sympathetic to him. The boy's self-esteem is very strange. I would rather help you, but I am not necessarily willing to accept your help."

"So you let him come to me as a parent?"

"No, let him come to you as a parent because..."

Lin Zhaoxi listened carefully, but saw that Lao Lin suddenly knocked on her lunch box, and told her not to pay attention, directly sandwiched the grilled loin inside.

"I said why I didn't have it inside, it was here." He squatted.

"father!"

"Because you are more fun." Lao Lin said, "Just jump and jump up and down."

Lin Chaoxi squatting at Lao Lin, always feel that Lao Lin means that she is more interesting, and if she is in a bad mood, she will lend it to her.

She glared at the old forest, but Lao Lin lowered her head. Only the old Lin Biao snorted and ate the cold face.

Lin Xiangxi thought, in fact, Lao Lin said that there is nothing wrong with it. For someone like this, to make him feel helped, it is better to let him feel that he needs to be more acceptable.

His family problems are irreconcilable and cannot be solved. They have no better way than to be with him.

Lin Zhaoxi looked at the top of Lao Lin and shouted: "Dad."

Lao Lin looked up, Lin Chou took advantage of all the crab sticks in his bowl, stuffed his mouth, and chewed and said: "When you make that figure isomorphic, you can find it, let us find something for him. Well, after all, it’s a genius in a hundred years."

Lao Lin: "There is no hundred years."

"what?"

"After all, I am, we are not that bad."

Lin Zhaoxi: "..."

——

That night, Lin was ruined by Lao Lin, and he was going to study with him.

It is still 100 days before she leaves the world.

In this 100 days, Lao Lin not only has to complete the entire wrong argument, but also to overthrow his argument, and there are new discoveries on this.

Even if she has all the research results of the old world of the strawberry world, she can't copy the things directly to the old forest.

What to do, she must be around Lao Lin, to test the rules of the world, find the right way, and solve the problem.

Lao Lin didn’t have any opinion about her. In the evening, Lin’s evening moved her homework into Laolin’s study.

However, Comrade Lao Lin expressed doubts about her professionalism: "How many pages did you read?"

Lin Xiangxi got up directly, went to the shelf of Laolin, and took out the first edition of "Graph Theory and Its Application" and said: "All are finished."

"Oh, great." Comrade Lao Lin gave her a compliment. "What about the exercises after the book?"

"Only half done, there are many who don't understand."

"That dad told you?"

"No, you are busy with you, I will not learn by myself. When you are empty, you will teach me again." Lin Chaoxi refused to do so, holding the book and sitting on his small table.

If you open Baidu Encyclopedia search graph theory, the first sentence is probably like this

- As we all know, graph theory originated from a very classic problem, the konigsberg problem.

The word Königsberg is certainly not so "well known", but if it is replaced by another translation of its name - the Seven Bridges problem. It has become a lot of content that students have been exposed to in the primary school.

Generally, it appears in the "small knowledge" column of the primary school mathematics book. The map is a and b separated by a river. There are two small islands c and d on the river. There are 7 bridges that link the island to the land. .

The question is as follows: How can a person start from any of a, b, c, and d, just pass each bridge once, and then return to the starting point?

Many people tried it at the time and found that there seems to be no way to do this. But this is mathematics, and it is necessary to prove it, whether possible or impossible.

Thus, graph theory was born.

In 1736, Euler submitted the paper "The Seven Bridges of Königsberg" to the St. Petersburg Academy of Sciences. The island and the river bank are abstracted as vertices, and the bridge becomes the edge connecting the vertices. It is impossible to prove that it is impossible to repeat the 7 bridges.

While completing the answer, Euler pioneered a new branch of mathematics—graph theory and geometric topology.

This is mathematics. You never know, behind the solution to a seemingly meaningless question, what kind of future will be hidden.

Lin Chaoxi turned over the contents of a chapter and felt in his heart.

In fact, she knows that she can't help much in a deeper place in this field. But for her, her fate seems to be involuntarily intertwined with this issue.

Learn more and understand a little bit. Maybe you can help Lao Lin at a certain moment.

Comrade Lao Lin in front of the desk is still burying his head, quietly doing his own calculations.

Studying this evening...

Lin Chaoxi did not help Lao Lin. Not only that, but Comrade Lao Lin also looked at her problem book and took time to give her a proof.

They talked about the Seven Bridges in a while, and Lao Lin said that he was just right, and his primary school Olympiad class was going to get this content, let her tell the children on the weekend.

So Lin Chaoxi inexplicably began to think about how to get on this class.

In the middle of the night, Lin lie on the bed and watch the mosquito net.

In the dark, she desperately asked herself to think again about the problems in the old Lin Lin certificate and the drafts of his new breakthroughs. She can't copy the things in her head, she can only do this, like an ant moving a mountain.

Forcibly understand and let yourself not forget.

Before she fell asleep, she crossed out the first day of 100 days on her timetable.

——

The Anning Experimental High School is the best school in the whole city of Anning. Every day, the classwork is heavy. You must arrive at school at 7:00 in the morning and 9:00 in the evening.

Lao Lin is more open-minded, and she is happy with her self-study in the evening, and the teacher of the class, Mei, also has an exception because she wants to participate in the mathematics competition training.

Therefore, she became the most special person in the class.

Lin Zhaoxi and Lu Zhihao are sitting in the classroom of the Olympics training class opened in the school. The time is 6 o'clock in the afternoon.

As in junior high school, she has no fate with Comrade Lao Lu, they are not in a class. Not only that, Lu Zhihao, Yan Zhi, Han Juan, Chen Chengcheng, including Comrade Zhang Liang are in 2 classes.

The Hanamaki is already a small and famous artist. The announcement is busy and will not participate in the competition.

"I heard that you had another fight yesterday?" Lu Zhihao saw her seat and looked up.

"What is it?" Lin Chaoxi turned out the problem set, and it hasn't come yet. High school student Lu Zhihao is very burly, she is a little crowded next to her, very unaccustomed.

"The 8 groups of small gangsters are saying that they want to engage you, how do you feel like nothing."

Lin Zhaoxi did not take it seriously: "We are famous schools, and the little punks say that I will engage me and I will be in the school."

"In any case, I just heard that you are less irritating. Our school really likes rogues who are bullying people. You are careful to walk and get sacks."

"No." Lin dynasty was quite sure, and by the way, the matter was handled yesterday and Lu Zhihao simply said.

"Hey, come to help you clean up the mess?" Lu Zhihao's first sentence is this.

"You use the adjectives very badly, change one quickly." Lin Chaoxi criticized.

"That should be no big deal." Comrade Lao Lu’s words turned, as if the words "裴之" were the best guarantees, "However, you have never thought about it, although those people can guarantee that they bully people, but if Are they looking for someone else?"

"..." Lin Xixi, "You said it makes sense, but we can only do so much."

"Well, I am just reminding. And I think that there is something wrong with you, you should also scare them, and it is estimated that you have no face."

"Well..." Lin turned to the competition book and workbook.

Gao Lin is really serious, the topics are neat and tidy, and there are even questions that are inconsistent, sometimes they are so good, and they will make their own questions. These are the habits she developed in the training team.

Lin Zhaoxi looked at it for a while, the teacher went into the classroom and was about to start class.

The classmates in front and back are also seated separately.

At this time, Lin realized that it was not yet.

"Don't you come?" She looked around and there seemed to be no such information in her memory.

"I haven't come yet, our competition is definitely too simple for him." Lu Zhihao looked at him strangely.

"Oh."

The bell started, the teacher walked onto the podium, and wrote a line on the blackboard: "Good classmates, what we want to learn today is the third lecture of high school mathematics - graph theory."

Lin Zhaoxi looked at the chalk on the blackboard, but there was a saying in his mind that he had said on the phone at the time - when she was sick, she asked me to never touch mathematics again, I promised. After her death, the promise she had made to me brought tremendous psychological pressure and made me very painful. 2k novel reading network