At about 10 o'clock in the evening, Wu Bin returned to the dormitory and found that the other three people in the dormitory were lying on the writing desk and writing hard.

"Oh, it's rare." Wu Bin is really rare to see three people working together.

Hearing Wu Bin's ridiculous tone, Li Yan raised his head first and said, "It's rare that you came back so early to be true, and the paper on graphene has been written?" ”

Wu Bin: "You guessed it, it was just done." ”

"Ah!! Wu Shen, you accept the supernatural powers, I am simply uncomfortable. Chen Anzhi, who was sitting next to Li Yan, dropped his pen, and his face was full of lovelessness.

"What's going on?" Wu Bin was a little inexplicable.

"I'm about to be killed by wire generation and electromagnetism, I thought I would learn a little easier with a little competition foundation." Chen Anzhi grabbed his hair, but when he thought about it, he stopped in distress, and looked at Wu Bin pitifully: "Big guy, can I borrow your notes to take a look?" I can wash your socks for you! ”

"I'm contracted for the panties! Let me take a look at it too, shall we? It would be nice to have a few pointers. Li Boxin on the side couldn't help shouting.

"Alas~" Wu Bin sighed, walked to Chen Zhi'an's side and glanced at the question he was doing.

"Kneeling on the matrix?"

"Wu Shen is wise!"

Picking up a pen casually, Wu Bin knocked on the matrix problem and said: "First use the row transformation, then use the inverse matrix, know that the matrix determinant is equal to -1 and then calculate the adjoining matrix, this, for the element numbered Mn, cross out the m row and the nth column of the original matrix......"

"Wait, wait, I'll digest it first." Chen Zhian couldn't help but feel a little hot and dry when he spoke, obviously they were all freshmen, and the gap was too big......

"Hmm......" Wu Bin made a nasal voice meaningfully and asked, "Do you think that the line generation is here to kill you?" ”

At this time, Li Boxin hurriedly replied: "What's more, it's still not the kind that doesn't give a good time, all kinds of torture." ”

Chen Zhian also immediately nodded in agreement.

Wu Bin: "To be honest, I think Mr. Luo's class is still very good, not only about knowledge points and mathematical ideas, but also full of practical application, you two won't be listening carefully, right?" ”

"Conscience of heaven and earth, I don't even dare to blink my eyes when I go online as a substitute teacher." Saying that, Chen Zhi'an sighed, "Alas, I learned math in high school quite easily, but this college math makes me feel like I'm studying in a fake high school, and I'm completely confused." ”

Wu Bin: "Normally, a big difference between high school mathematics and college mathematics is that college mathematics is basically about to start moving in the direction of modern mathematics, and modern mathematics is developing in the direction of abstraction. ”

Li Boxin: "I'm about to have a convulsion......"

Ignoring Li Boxin's complaints, Wu Bin continued: "The advantage of abstraction is that the more abstract the tool, the wider the scope of application, and the price is that it is more difficult to start. ”

"Mathematics is not like physics, many things can be understood by concrete things, if you want to learn mathematics well, you must establish a mathematical sense of abstract things, and understand mathematics, right?"

"I don't understand." Chen Zhian shook his head for a while.

"Alas, let's do more questions, this feeling is more difficult to build up without doing a certain amount of exercises."

Chen Zhi'an: "Aren't I doing it...... Wu Shen has any tricks to teach, don't you? ”

"You can do more questions first."

"You have to have a goal to do the questions...... I'm panicking now, I don't want to fail my freshman year......"

Listening to Chen Zhi'an's tone of crying, Wu Bin thought for a while and said: "Tsk, if you really want to say something, for example, if you draw an image from your intuitive feeling or think about it in your head, you feel that the conclusion to be proved will come out, have you ever felt this way?" ”

"Hey, I often feel this way!" Li Boxin on the side looked very excited, as if he had been poked at some G-spot.

"But you can't write it in strict mathematical language, can you?"

"Russia...... Be. Li Boxin was stunned.

"Then it means that you still can't do this kind of problem, take the relatively simple continuous function intermediate value theorem in calculus as an example, if a problem asks you to prove this theorem, maybe you will draw a graph, think that there is a little function value greater than 0, a little function value less than 0, then the curve is continuous, it will definitely cross the x-axis, but I don't know how to express it......"

Listening to Wu Bin's simple and clear learning ideas, Li Boxin and Chen Zhian nodded frequently, and a look of "so it is" flashed from time to time.

"So, I think for a math course, such as calculus, sometimes you may feel that it is obviously equal to 1 with your eyes, but you can't understand it if you prove it in strict language, which is actually the same as not."

"Because the purpose of this question is to test your use of mathematical language to demonstrate, and if you can't prove it, you don't meet the standard in this regard."

Looking at the thoughtful looks of the two, Wu Bin finally summed up.

"I want to express a meaning when I say so much, I really understand when I know how to do questions, and it's never a shame to brush up on questions."

"Ahem...... Am I so obvious? Chen Zhi'an's old face turned red.

Being admitted to HKUST, Chen Zhian is still very confident in his academic ability, so he always feels that brushing questions is a very LO behavior, even if he can't keep up with the progress of class, he still thinks that there may be a problem with his learning methods or ideas.

Now that it is pointed out by Wu Bin in person, it is also a little embarrassing.

Li Boxin, on the other side, had already silently brushed the questions.

"What about you, also doing your homework in liver class?" After clicking on the two, Wu Bin looked back at Li Yan.

"No, I'm going to write a manuscript, I'm going to slap a civil science on Weibo, oh no, it's known."

"You're really ...... free"

"It's not that I'm idle, I feel uncomfortable watching this slut jumping up and down, and I'm morally kidnapped at every turn, oh, I'll show you." Li Yan said and stretched out his mobile phone in front of Wu Bin.

Wu Bin took a look and found that he was tearing up something about the stock market.

"You've all studied stocks!?" Wu Bin was shocked.

"I understand a little bit, but it's not the stock that is torn, it's a 2B public knowledge that I have to elevate the stock market crash to the level of national instability, and there are a bunch of people who are coaxing, it's just that."

"Isn't this the basic operation of Weibo?" Wu Bin said and pushed the phone back.

When he first played Weibo, he swiped a hot search for Yang Zhenning, which listed some of Yang's status in the physics community, as well as what contributions he had made and what awards he had won.

At that time, Wu Bin was amazed that one person could make significant contributions to statistical physics (Li Yang's theorem, Yang Baxter's equation), particle physics (cosmic non-conservation) and field theory (Yang Mills) at the same time.