Mathematics means not being afraid and being interested in it can lead to a long-term future.

In fact, Lin Xuerui knew that in this mathematics competition class, most students will not engage in mathematical research in the future, but this has nothing to do with it.

She said more than once in class that mathematics is the foundation of all subjects. Learning mathematics well and going to other subjects, applying mathematics to other subjects is also a way out, such as mathematics and engineering science, mathematics and social economic science.

There is no need to study mathematics for the gold medal in mathematics, and you can transfer to other departments. Peking University professor Jiang Boju, as one of the pioneers of mathematics in modern China, remembers that her professor said that China has always attached importance to experience and neglected theory. The scientific community also lacks rational understanding of mathematics, and is not as closely related to mathematics as the scientific community and engineering community abroad.

China wants to change the concept that "mathematics is to cultivate mathematicians."

In the eyes of ordinary people, it is also true that the gold medal in the mathematics of the Olympiad will have to study mathematics in the future, which means that they do not have enough understanding of mathematics. It is actually very popular to transfer to graduates from basic subjects in other directions.

After class, Lin Xuerui left straight, and Li Xuan chased after him: "Coach, wait a moment!"

Li Xuerui turned around: "What's wrong?"

Li Xuan said earnestly: "Can you give me a copy of your thesis of Chen's theorem?"

This kind of paper is generally very confidential and has high academic value. If you haven't entered that circle, you can't find it online. It will cost money to find it to download it.

Lin Xuerui smiled and put the paper in Li Xuan's hands.

Li Xuan was satisfied and carefully collected the paper. He couldn't understand the paper now, but there would be one day when he would understand the paper.

At this time, Lin Xuerui thought of something again and said, "By the way, come here with me, I have a book for you."

Li Xuan followed suit as he said.

On the way to the teaching and research department, the two were chatting together, mainly because Lin Xuerui was asking and Li Xuan answered.

Li Xuan's mathematical progress was as expected by her, far exceeding that of her classmates. Lin Xuerui learned from the chat that Li Xuan had finished reading Pan Chengtong's "Theory of Elementary Numbers" in the past few days, and had read a lot of other popular science books and competition books.

Lin Xuerui felt more and more that Li Xuan was talented and had excellent understanding ability, and was much more talented than when she was in high school. She had plans to train Li Xuan in her heart and gave some suggestions:

"The concept of congruence must be understood with a focus, which is very important in elementary number theory. Many issues can be explained by congruence."

"There are only a few Fibonacci sequences and Yang Hui triangles. I used to test too many competitions in the past. For experts, it is a bit of a bonus question. CMO cannot test Yang Hui triangles as simple as that."

"Just read books like interesting and popular science. Increase your interest and don't be addicted to it. The surface is very strong. You should think more about mathematics and do more questions."

...

Li Xuan expressed his understanding.

The book "Elementary Number Theory" is very classic. Even though Li Xuan's mind is much better than before, he has read it for a long time to fully understand it and integrate knowledge. For example, Fermat's theorem is a special case of Euler's theorem. The knowledge of elementary number theory is simple, but the exercises in the book have not been fully understood.

As for other books, it is not difficult, so it does not take a lot of time. From this perspective, math books in high school libraries are indeed limited, and most of them are popular science. Even if there are competition books, the questions are still relatively old.

Pan Chengtong's "Theory of Elementary Numbers" is very famous in the competition circle. Now all the students in the competition class are eating this book.

When the two arrived at the teaching and research room, Lin Xuerui flipped through the book on the desk, found a book called "Halalge Number Theory" and handed it to Li Xuan: "This book is "Halalge Number Theory", take it to read it, and systematically learn number theory."

Li Xuan was grateful in his heart and took the book, "Thank you, coach."

Lin Xuerui continued: "Then there is the exercise book, the "Collection of Elementary Number Theory Test Questions in Mathematical Olympics in Various Countries" compiled by Wang Lianxiao, "1001 Questions in Classic Number Theory" compiled by Jean, a famous foreign scholar, and Liu Peijie's "Collection of Elementary Number Theory Problems". These questions are very skillful and involve very little knowledge."

Li Xuan didn't see the exercise book, which was a little strange.

Lin Xuerui smiled and said, "I don't have them. You need to buy these books online by yourself. It's enough for you to study them for a while and understand them thoroughly. The number theory topics in the rematch of the high school mathematics league will not be difficult for you."

Li Xuan nodded, picked up a pen and wrote down the title of the book, and prepared to go home to surf the Internet, and buy it back and see it immediately.

...

...

As time passes, the week-long Chaoyang Cup winter camp is about to begin, and it is time for Li Xuan to set off for Peking University.

At the EMU, six students were carrying their luggage and waiting for the EMU to arrive at the station. Those who could go to the Chaoyang Cup winter camp were not only the top ten in the Chaoyang Cup, but also the registration was also available online. As long as they had excellent math grades, school recommendations, and ability, they could be selected.

These six students who went to the capital were all top mathematics students selected from the province, most of whom came from Huajiao Middle School and Pengzhonghe Experimental Middle School. One person Li Xuan had met was Ouyang Zhe, the second place in the Chaoyang Cup provincial competition area. As a player of the last National Group team, his fame was very high among the competition students.

"Ou Shen, what's going on in your situation? Why was the student from No. 2 Middle School fucked?" The man who spoke was Cao Song, a competition student from Huajiao Middle School.

The Chaoyang Cup mathematics competition system is not allowed to participate in the third year of high school students. As a senior high school student, he cannot participate because the high school mathematics league is coming. In order to improve his math level, he also signed up for the winter camp and came from Huajiao Middle School. He was selected without any surprise.

After all, the senior high school competition students studied for one year more than the second year of high school, and their overall strength was stronger than the first and second year of high school. Cao Song won the first place in the second year of high school and joined the provincial team. He almost suppressed all competition students in the province and was extremely strong across the country. He worked hard for a year, and this time he planned to attack the national team again.

Ouyang Zhe said calmly: "Why are there so many problems? It's strange to lose once?"

"So, Li Xuan is better than you?"

"Then I don't know. In Chaoyang Cup, he didn't solve a finale question, and he did all the others. I only know that he has a solid foundation and can get full marks in one or two trials."

Cao Song felt thoughtful after hearing this.

When he arrived at the high school mathematics league, Li Xuan was afraid that he was also his strong opponent. After all, he could not ensure full marks. Because the provincial team admitted six people, he must fight to the death, and he cared a little.

Zhou Lele, who was standing by, kept listening. He was also a senior high school student in the Experimental Middle School who was selected. Of course, he came, just because he wanted to go to Peking University and had no other thoughts.

When he arrived at the EMU station, he just met Ouyang Zhe himself. He admired Ouyang Zhe's math strength and couldn't help but interrupt and said, "Li Xuan is definitely not as strong as Ouyang Zhe. One exam cannot explain the problem. It may be a component of luck. In history, the best CMO gold medal in the math competition in No. 2 Middle School is the best. I have never heard of anyone entering the national team. Ouyang Zhe is a member of the future national team."

In the last CMO, Ouyang Zhe was a few points away from being selected for the six-man national team, representing China to go to the international arena. Ouyang Zhe studied for another year, and he was sure that Ouyang Zhe could enter the national team.

It’s not that he looked down on Li Xuan, but because Guangdong Province can only be considered middle-aged and upper-middle in mathematics competitions, and there is a certain gap with strong provinces like Hubei Province. The situation where one province has two national teams is too incredible. He doesn’t believe that Li Xuan has the level of Ouyang Zhe, and is more willing to believe that Li Xuan is purely based on luck.

Ouyang Zhe was silent for a while, and suddenly said, "Li Xuan, he has never learned competitions in junior high school, and only started learning mathematics competitions in high school."

It was this sentence that made Cao Song and others stunned and couldn't believe it. It was a genius, and the basic law should be paid attention to progress. For example, although Ouyang Zhe entered the national training team in the first year of high school and became the strongest 60 people in the country, he started to learn mathematics competitions in the second year of junior high school, and actually studied it for two years.

Most of the people present started to study in the first year of high school, and were stumbled all the way and were abused for two years. Only in the third year of high school had such top-notch strength. I have never heard of anyone who studied mathematics competition in the first year of high school and immediately exploded. This kind of talent subverted their cognition.

"Impossible!"

"It is amazing to be able to win the first prize in Chaoyang Cup in one year after studying mathematics competition. Even if Li Xuan started studying since the summer vacation of the third year of junior high school, it will only take half a year to finish, which is a bit exaggerated."

"That's right, maybe Li Xuan was secretly studying math competitions in junior high school. Who knows?"

“…”

Ouyang Zhe didn't believe it for the first time, but his junior high school classmate Jin Letian was in No. 2 Middle School. Jin Letian said that Li Xuan was in the first year of high school and only started learning mathematics competitions at the request of his teacher. He had never won the prize before junior high school.

Just then, Ouyang Zhe saw a figure and couldn't help but say, "Li Xuan is here."

"Damn, girl?" Zhou Lele was also shocked when she saw Li Xuan.

"No, it's a man." Ouyang Zhe shook his head and explained.

At this time, Li Xuan made an appointment online and arrived at the waiting area. He looked around and saw a group of young people gathered under the Chaoyang Cup sign. He walked over, "Hello, are you also participating in the Chaoyang Cup winter camp? My name is Li Xuan, Yangcheng No. 2 Middle School."

Cao Song did not underestimate Li Xuan in his heart, and said with a smile: "Hello, I am Cao Song, from Huajiao Middle School, this year's senior year. Let's get to know each other."

"Ouyang Zhe, Pengcheng Middle School."

"I, Zhou Lele, Experimental Middle School, I'm just here to make soy sauce."

Soon, Ouyang Zhe built a group of "Guangdong Province Chaoyang Winter Camp Group" in Penguin, so that all the students here could add it.
Chapter completed!