Monday, 7:40 a.m.

The weather is sunny and the autumn breeze is slightly cool.

Lu You and the four arrived at the classroom.

The classroom is a small classroom, with two large blackboards hanging side by side on the wall and a classroom lectern on the side of the window sill at the front.

Most of the remaining space is occupied by three rows of white tables and chairs arranged in a 1:2:1 ratio, with a wide aisle between the different rows of tables and chairs that can accommodate two people walking side by side.

At this time, there were not many students in the classroom, and there were more than a dozen scattered students, all doing their own things.

Lu You took the three of them to sit in the third row in the middle.

They are here to listen to the class, not to touch the fish, so naturally they will not sit in the back row, and they will have to face the teacher too far in the front row.

Therefore, the third row has become the best choice for Lu You.

Zhang Zhichuang unzipped his schoolbag and placed a book titled "Linear Algebra" with a white cover on the table, and then took out a notebook with a pen pinned to it.

While digging out things, Zhang Zhichuang didn't forget to say: "Oh, the university is good!" Classes are only at 8 o'clock in the morning, so you can sleep until you wake up naturally. Unlike high school animals, they get up earlier than chickens, go to bed later than dogs, and are pointed at for being lazy for a while. ”

Lu You smiled and didn't speak.

He is a person who has come over, and he knows very well that once college is rolled up, it will only be better than high school.

Zhang Zhichuang opened the book and notebook, and a lot of words were already written on the white pages.

At the level of the School of Mathematics of Capital University, there are only a few who do not study before class.

In particular, the textbooks used in their advanced algebra experimental class are still in English, and there are a bunch of professional terms, so don't try to keep up without pre-studying.

In the next ten minutes, students came in one after another.

is basically a member of the competition training team, Lu You barely has an impression, but he can't call out his name. In order to avoid embarrassment, they simply treated everyone equally and pretended not to know each other.

Unless he took the initiative to lean over to say hello, Lu You would smile politely and politely.

During this period, Lu You's only three acquaintances, two other members of the IMO national team and Qin Xiyue also walked in.

The former reminisced with Lu You and the four of them, and then went to the rear with their roommates, while Qin Xiyue was forcibly pressed next to Zhang Zhichuang.

"Xiyue, why are you alone, your roommate?"

Qin Xiyue first said "good morning" to Lu You and the others, and then replied: "They were afraid that the exam in the experimental class would be too difficult, so they didn't dare to choose." ”

Zhang Zhichuang was overjoyed.

Qin Xiyue's roommate didn't come, didn't she say that she could sit with her in every advanced algebra class?

Gong Qing frowned, he found that the information provided by Qin Xiyue was different from his own cognition.

"Doesn't it mean that the difference between the experimental class and the large class is only in the way of teaching, and the content of the exam is consistent?"

Qin Xiyue explained: "This year's experimental class has changed back to the teacher of three years ago, and I heard from the seniors in the senior year that this teacher does not play cards according to common sense and likes to solve problems by himself. ”

Qin Xiyue pointed to the books on the desktop again, and said, "Oh, just look at the textbooks." My roommates used the school's publications, and we used MIT textbooks from the '60s. ”

Gong Qing was thoughtful, but he didn't pay much attention to it.

In his opinion, as long as the scope of the exam does not exceed the outline, he is confident that he can get more than 90% of the scores no matter how the teacher asks questions.

Lu You and Bi Yangde have similar ideas.

For them, exams are not a matter at all, just a means to test their learning results.

"That's right, Shigetsu."

Zhang Zhichuang pushed the notebook in front of Qin Xiyue and said earnestly: "I have made a lot of notes in the past few days, do you want to check it?" ”

"Well, thank you."

Qin Xiyue casually flipped through a few pages of notebook and asked, "Are you free tonight?" ”

"Yes! Very! Very much! ”

"Then let's have a meal together, and find a place to study after eating."

"No problem!"

Listening to the conversation between the two, Bi Yangde's right hand under the table slowly clenched.

Heaven is unfair!

Lu You was keenly aware of Bi Yangde's strangeness, patted his shoulder with his right hand, and said comfortingly: "Calm down, women are not a big deal, it will only affect your speed of solving problems." ”

"Give me a girlfriend, I'd rather solve the problem slowly!"

……

Eight fifty-five o'clock.

A young man in a plaid shirt, in his early seventies and medium build, walked in with a book and a stainless steel thermos mug in his hand.

The original whispering in the classroom disappeared in an instant, and all the students looked up in the same direction.

The young man has a pair of black-rimmed glasses hanging from the bridge of his nose, and his face looks slightly younger.

But the frighteningly high hairline and the slightly bald top of the hair inexplicably give people a strong sense of security.

The young man put down his belongings, looked around the classroom, and asked, "Is everyone here?" ”

The classroom was silent, and no one responded.

The young man didn't care, he took out his mobile phone and clicked on QQ, and asked, "Everyone has a mobile phone, right?" If not, raise your hand and I'll take a look. ”

Classmates in the audience, you look at me, I look at you, and no one raised their hands.

"Good."

The young man nodded and said, "Let's take out the mobile phone, open QQ, let's build a class group face to face, and the students who can't be added will find a pull around." ”

In a short time, the group was created.

The number of people in the class increased at a rapid rate until it stopped at the number "51".

"It seems that everyone gave me face in the first class, and no one skipped class."

The youth put his phone aside.

"Some arrangements for the class group, I will post them in the group after class, and now I will introduce myself."

The young man picked up a piece of chalk, turned around and wrote two large characters and a string of numbers on the blackboard.

"My surname is An, my name is Anheng, this is my phone number and VX number, you can remember it, you can find me if you have math problems or life problems. However, it is limited to 8 a.m. to 10 p.m., and the rest of the time, I can't read it back. ”

"Teacher An, do you also hold the position of a psychological tutor?" Someone wondered.

An Heng turned around, the corners of his mouth slightly raised.

"No, I just want to eat melons."

In a simple sentence, the originally dull atmosphere suddenly became lively, and it quickly shortened the distance between teachers and students.

"Straight to the point."

An Heng clapped his hands, and the noisy classroom returned to quiet.

He stepped out from behind the podium into the aisle at the side of the classroom, and the eyes of the crowd shifted.

"Let me ask you a question, do you know what kind of class this is?"

Zhang Zhi founded the horse and raised his hand.

"Classmates, please speak."

Zhang Zhichuang stood up and replied methodically: "Advanced algebra." ”

"What class do you belong to?"

"Experimental class."

"What's the difference between it and Taipan?"

Zhang Zhichuang thought for a moment and said uncertainly: "The teaching method is different from the exam?" ”

An Heng waved his hand, motioned for Zhang Zhichuang to sit down, and asked with a smile, "Classmate Zhang, what's your name?" ”

A string of question marks popped up on Zhang Zhichuang's head.

Doesn't that know my name? Why ask?

Doubts are doubts, Zhang Zhichuang still replied truthfully: "Teacher, my name is Zhang Zhichuang." ”

"Okay, classmate Zhang, I remember you, go back and add your usual points."

Zhang Zhichuang looked surprised, he just wanted to join in the fun, but he didn't expect that there would be benefits.

The atmosphere in the classroom changed again, from a breeze to a dark tide.

An Heng put his gaze back on the whole class, and then said: "What classmate Zhang said is right, but he is not right, he did not say it all.

Just as advanced algebra is not the most 'advanced' algebra, and abstract algebra is not the most 'abstract', our experimental class is not going to do experiments.

The purpose of the experimental class in the school boils down to four words, teaching students according to their aptitude, similar to the Honors Course in Europe and the United States. ”

Zhang Zhichuang bent down to Lu You's side and asked in a low voice, "Brother Lu, what is the Honors Course that Teacher An said?" ”

Lu You also lowered his voice and replied: "You understand that it is our top class in high school, providing the best quality resources to the best group of students. ”

"Europe and the United States also engage in differential treatment?"

Lu You showed a hint of ridicule, he laughed at Zhang Zhichuang for being too naïve.

"Europe and the United States are surnamed capital, how to maximize returns, people are much more skilled than us."

"Scared!"

The private chat between the two did not affect An Heng's eloquent conversation.

"Student Zhang mentioned that the teaching methods of our classes are different from those of the large class, and I will tell you about the specific differences."

An Heng walked back to the blackboard, writing on the blackboard with chalk while verbally repeating.

"In order to take care of most students, the curriculum of large classes often starts with equations, matrices, and determinants, which are closer to the style of middle and high school mathematics, and then gradually introduces the concepts of linear space and linear mapping.

Our course is based on linear space and linear mapping, and the beginning is the linear space in the general domain, and matrices, determinants, and polynomials are all regarded as tools for studying linear space and linear mapping.

Both methods have their own advantages and disadvantages, and there is no such thing as one being superior or the other. The former is easy for most people to accept, but it is inevitable to omit some essential things, while the latter is close to the essence, but it has certain threshold requirements for students.

In our school, there are indeed a handful of students who are ahead of others at the beginning, such as competition students, congenital abstract holy bodies, or junior high school and high school students who have the experience of learning line generations, in short, each has its own strengths. ”

Lu You covered his mouth quietly, and he almost couldn't hold back his laughter.

The so-called congenital abstract eucharist refers to a person who is born with a strong abstract mind.

This kind of person is extremely quick to accept abstract language, and when the average person still reads theorems literally, he already understands the deep meaning of the law, and even thinks about how to apply it.

Lu You has seen a lot, and he himself is too.

After all, there are few people who can insist on doing scientific research in the field of mathematics that are not abstract.

"Therefore, in order to provide a more suitable platform for this small group of students, the school has set up an experimental class."

An Heng threw back the chalk box with only half of the chalk left in his hand, patted the dust on his fingers, turned around and said, "This is the situation, if you still have questions, you can raise your hand to ask." ”

Gong Qing raised his right hand for the first time, afraid that An Heng would not be able to see it, so he waved it left and right twice.

An Heng and Gong Qing looked at each other and motioned for him to get up,

Gong Qing got up and saluted, neither humble nor arrogant: "Teacher An, hello, my name is Gong Qing." ”

"Hello, Gong-san."

Last year, the IMO national team ranked one full of six, and An Heng had an impression.

Including the previous Zhang Zhichuang, Bi Yangde and Lu You beside Gong Qing, and An Heng all have impressions.

Being able to get a full score on IMO is already barely called a mathematical talent, and it is worth looking at An Heng twice, but if you want to pay more attention to it, it must not be.

No matter how loud the name of imo is, it can't be separated from the essence of doing questions. In mathematics, doing problems and doing research are completely different things.

If you are strong in doing problems, you may not be strong in scientific research, but if you are doing scientific research well, you will definitely not be much worse in doing problems.

People who are quick to do questions and are confused when they come to write papers, An Heng has seen too many.

Gong Qing didn't know that An Heng had so many mental activities, so he asked to himself: "Teacher, I heard that the exam papers of the experimental class are different from those of the large class, and you make the questions yourself, is it true?" ”

"On the first day of class, you want to know the content of the mid-term and final exams? Rolled up too early, right? An Heng teased.

"I just want to know if it's true, as for the way and the specific content of the test paper, I don't care."

"I'm sorry, I misunderstood, I apologize to you."

An Heng motioned for Gong Qing to sit down, the smile on his face retracted, and his expression gradually became serious.

"Compared with everyone's concern about the questions of the exam, I am here to explain that what Gong said is right, and I will definitely tell you that the difficulty of the test paper is higher than that of the large class.

You don't need to tell me how the teachers used to be, it was before, and it is now. Since the school has chosen me as a teacher, you have to follow my rules, and if you have any objections, you can raise them directly, and I will personally find the yard to help you withdraw from class. ”

For half a minute, no one spoke.

An Heng put on a smiling face again, and he still understood the truth of giving a stick to a jujube.

"You don't have to be afraid, although I said that the test paper is more difficult, but I will not deliberately make things difficult, as long as you listen carefully to the class and complete the homework I assigned, there is no problem at all in passing the exam, and the harvest is definitely richer than that of the large class."

"Now that I've said that's all I have to say, let's start the official class and turn to the first chapter, Linear Equations."

(End of chapter)