At lunchtime, Sun Erxiong didn't discuss any specific math problems with Shen Qi, and they spent most of their time at home.

"Shen Qi, what profession are your parents engaged in?"

"My dad is a little business, and my mom is a doctor. ”

"It seems that your family conditions are good, what about your grandparents' generation?"

"Professor Sun, I still have to check my household registration when I come to Yan University? My grandparents are all workers, and my grandparents are doctors. ”

"It's good, it's good, your father's side is Miaohong, and your mother's side is from a medical family, so why did you choose mathematics, Shen Qi?"

"Learn mathematics, physics and chemistry well, and you will not be afraid to go all over the world. ”

"Very official answer, but I believe it. Are you used to life in the north?"

"No matter how difficult the road to study is, I will continue to walk. In fact, the north is quite good, but it is dry, I haven't had a poop for three days, and I can't pull it out. ”

"Shen Qi, I'm eating dumplings!" Sun Erxiong took a bite of dumplings stuck in his throat, struggling to retreat.

"Professor Sun, aren't I eating too?" Shen Qi was not abnormal.

"Count me ruthless, I'm leaving. Sun Erxiong wiped his mouth, stood up and left.

"Hey, Professor Sun, don't go......" Shen Qi watched the fat old Sun of two hundred catties drift away, and they divided three catties of dumplings, Shen Qi ate one catty, and Sun Erxiong ate two catties.

For the whole afternoon, Shen Qi drew on scratch paper.

In fact, Shen Qi also felt some problems in mathematics, in the past eight months, he has read a large number of mathematical literature, journals, and papers, and the accumulation of mathematical knowledge is enough, and he also has a certain ability to comprehensively apply, but there is still a gap from the realm of opening and closing, and retracting freely. This led him to go wrong in some mathematical problems and love to drill the horns.

"Forget it, don't draw it, I have a headache. Shen Qi stopped to draw and rubbed his temples, he had drawn 101 kinds of drawings in one afternoon, and they could be taken out and sold for money in a bound book.

Crunch, the door of the room opened, and Sun Erxiong entered the house with a big bag of buns.

"It's almost six o'clock, Shen Qi, let's eat steamed buns for dinner. Sun Erxiong put the bun on the table, and it had to be four or five catties.

Shen Qi pushed 101 stacks of white paper with graphics in front of Sun Erxiong, looking very tired: "Professor Sun, I have drawn 101 answers, you can see which one you want." ”

Sun Erxiong made a bun in his left hand, and quickly flipped the white paper with his right hand, he flipped to the 12th sheet, pulled it out and said lightly: "That's it, congratulations to Shen Qi, the answer is correct." ”

"Professor Sun, don't you have to check the back?" asked Shen Qi.

"No need. Sun Erxiong put the 12th blank paper on the table.

The pattern on the white paper is a regular hexagon, with a circle cut inside, and three lines inside the regular hexagon, just through the center of the circle.

"This ...... Brianchon's theorem is solved?" Shen Qi couldn't believe it, it was so simple?

(Note [2] Brionchon's theorem: the common point of three pairs of vertices of a simple hexagonal curve that is cut to a non-degenerate second-order curve, this point is called Brionchon's point)

"That's right, what I want is a supplementary map of Brianchon's point. Sun Erxiong nodded and ate a pork and green onion bun.

"Ah......" Shen Qi looked up at the ceiling and let out a desolate sigh, I worked hard to draw all afternoon and think all day, all you want is a Brion point?

"Shen Qi, you see, the left picture on the blackboard is based on Pascal's theorem. Sun Erxiong walked to the blackboard, knocked on the left picture, and said, "You only need to give the projective geometric expression of Brianchon's theorem, and it is enough." In fact, the logic is not difficult, Pascal's theorem and Brianchon's theorem are dual to each other. ”

"For example, Shen Qi, you spread out your palm and saw the palm of your hand, then turned over your palm so that the back of your hand was facing up, and you completed the answer, it was so easy. However, in order to complete this easy step, you first do a set of warm-up exercises, then run five kilometers and get yourself on your stomach. In fact, a lot of movement in front of the back is futile, not that it is useless and unnecessary. ”

"Groove ......" Shen Qi spread out his palm, palm up, and then backpalm, back of hand up, one more time, one, two, three, four.

"So Shen Qi, do you realize where your problem is?" asked Sun Erxiong.

"I'm just afraid I'm going crazy. Shen Qi's face was solemn, the cultivation in the field of mathematics may have reached the tribulation period, further entering the immortal realm, and taking a step back from the sky to thunder.

"Have you read martial arts novels, Shen Qi. Sun Erxiong suddenly pulled up a seemingly irrelevant topic.

"Of course, Jin Guliang is familiar with it. ”

"Then let me ask you, is Zhang Wuji's internal strength strong?"

"Sect Leader Zhang has the Jiuyang Divine Skill to protect the body, and the internal strength is strong. ”

"What is the specific trick that Zhang Wuji often uses?"

He ...... He doesn't seem to have any specific tricks, right? Qiankun moved casually twice, and killed the opponent in seconds, which is a stream-of-consciousness operation. ”

"So Shen Qi, what did you learn from Zhang Wuji?"

"Could it be...... Could it be ...... The highest level of martial arts is to win without moves, and if you can't beat you within three moves, you count me as losing?" Shen Qi trembled inexplicably.

Sun Erxiong smiled: "The same is true of basic mathematics, the simpler, the more complex, the more complex, the simpler. Can you relate to it?"

After staring at the dog for a minute, Shen Qi suddenly came to his senses: "I understand, I understand! Thank you, Professor Sun, I have comprehended new skills! I know how to write my problem-solving skills guide! Master, Professor Sun, you must be a top master, Zhang Sanfeng-like existence!"

"I'm not a grandmaster, just an ordinary teacher. Sun Erxiong waved his hand and said, "There are still nine months before you come to Yan University to officially register, and my directional advice to you in these nine months is that you don't need to add new reading content to mathematics, just review the mathematical theories you have already taught yourself." After the end of this math camp, Shen Qi, when you return home, you should diverge the breadth of knowledge and expand the coverage of knowledge, and basic physics and basic computer theory are good supplements. ”

"Even the entry-level architecture, painting principles, music basics, you can try to touch them when you have time, and believe me, it will help you step into a deeper realm of mathematics. We at Yanda have never cultivated nerds, we are the founders of academic masters. can only do questions without thinking, even if you graduate from Yan University and get a diploma, you are nothing more than a senior part-time worker. ”

Shen Qi was shocked: "I understand, listening to Professor Sun's words is better than reading a book for ten years." ”

"Next September, I hope to meet a better Shen Qi. Sun Erxiong smiled, took out a bun from the bag and handed it to Shen Qi: "I'm done with what I should say, eat the bun Shen Qi." ”

Shen Qi took the steamed bun and ate it very fragrantly.

At this time, the wall clock on the wall ticked, and Shen Qi turned his head to look, oops, it's six o'clock!

"Professor Sun, you will definitely be able to meet a better Shen Qi next September, but now, I have to go. Shen Qi grabbed two buns and stuffed them in his pockets, looking like he was about to leave in a hurry.

"In such a hurry, where are you going, do you need me to send you?" Sun Erxiong took out his car keys.

"In the sports field of the Capital Sports University, I have a good brother who is about to compete. ”

"Then Shen Qi, you can take the subway by yourself, at this point you will drive to the Capital Sports University, and the road will be blocked for at least two hours. ”

"I'm leaving, see you tomorrow!" Shen Qi rushed away.

In a hurry to catch up with the dead, Shen Qi arrived at the sports field of the Capital Sports University at half past six, where the National U19 Track and Field Games were held.

"Fortunately, I caught up, which one is Xu Rui?"

In the audience stands, Shen Qi looked at the 100-meter starting line on the plastic track, and eight young runners lined up.

The muscular guy in the fourth lane, wearing a blue sportswear with the words "Nanyue Province" on his back, is Xu Rui.

Bang!

At this time, the starting gun sounded, and the men's 100-meter run final of the National U19 Track and Field Games began.

Xu Rui's start was terrible, he started noticeably slower than the other runners, and fell to last place as soon as he started.

In the acceleration and midway stages, Xu Rui ran wildly as if he was desperate, and he chased several people to the third position.

"Rush Xu Rui, explode two more!" Shen Qi was nervous as he watched the battle, he knew that only the 100-meter championship was meaningful to Xu Rui, and the second and third were equivalent to failure.

However, the strength of the first two runners is very strong on the way, even if Xu Rui presses the gun to start, he may not have an absolute chance of winning the championship, not to mention his bad start.

The red-shirted player in the fifth lane took the lead in crossing the line, and Shen Qi covered his face and didn't dare to continue looking.

In the end, the results were shown on the big screen, and the players from the capital team won the men's 100-meter championship in 10.79 seconds, and Xu Rui ranked third in 10.90 seconds.

Shen Qi had to watch it even if he didn't look at it, but in the arena, Xu Rui, who had finished the game, was sitting on the ground, his expression was sluggish, and he was extremely lost.

"Well, it's not easy to win a national victory. Shen Qi rushed to the scene of the game, he couldn't witness Xu Rui win the championship with his own eyes, all he saw was failure. According to Xu Rui, Mizuki University only accepts national champions in each individual event, so Xu Rui is a bit hangy to be sent to Mizuki University through his sports expertise.