Xu Mang didn't want to make trouble in Columbia, the reason why he ran into other people's classrooms was to see what advanced aspects of Columbia University, which positioned the physics major as one of the most outstanding majors, in terms of teaching, and if there was, he would copy it.

No way... It is better to cross the river by touching the eagle sauce than by touching the stones yourself.

However, it is a pity that Xu Mang did not get any new feeling, basically reading according to the textbook, and then analyzing it according to a classic example, and talking about the places that he paid attention to, which is not distinctive... It's pretty much the same as what I'm usually taught.

Xu Mang felt very sorry for this, he should go to the library to see what the attendance rate of the library is, through the analysis of the attendance rate, you can basically judge the teaching quality of this school.

It's embarrassing...

It's boring to sit like this.

Xu Mang is sitting and dying, and he is currently teaching the calculation approximation method of quantum mechanics, in fact, these things are just like that, mainly because he has reached the point where he is ripe... There's no point in listening to any more of this stuff.

"The motion of molecules is more complex than that of atoms. ”

"A molecule involves not only the movement of electrons, but also the movement of the nucleus, in which the nuclei of the molecule vibrate in close proximity to their equilibrium position. Based on the pictures projected by the projector, the professor explained to the students in the audience the vibrations and rotation of molecules.

Then

The professor suddenly noticed that one of the more than forty students was in a daze, and the most important thing was that he didn't even have a notepad, so he just sat in a daze.

Although many students in universities are mainly self-studying, and they either sit in the dormitory to read books in their spare time, stay in the library to read books, or conduct research in the laboratory, the most basic etiquette in class must always be achieved.

No textbooks, no notepads, no pens... What class are you going to take?

"Ahem!"

"This classmate, pay attention. The professor looked at Xu Mang and said with a serious face: "If you don't bring anything next time, then you won't have to take my class." ”

The sudden reminder was unguardable, Xu Mang was still silent in his fantasy, and then was awakened by the professor, confused and at a loss, Xu Mang nodded, in fact, his behavior was just a subconscious behavior.

The class continued and did not stop because of this small incident.

"Hey!"

"Sister!" Xu Mang silently leaned closer to the blonde woman beside him, and said with a smile, "Can you let me share your textbook?"

"No problem. The blonde woman agreed to Xu Mang's request.

This sister is ordinary-looking, just blond hair, blue eyes, and that's the end of it... However, for Xu Mang, it seems that foreign women are like this, unless there are special Hollywood film and television stars, it is difficult for Xu Mang to distinguish the appearance of foreign women.

"Why haven't I ever seen you? Are you here to observe?" The blonde girl looked at Xu Mang curiously, there were no oriental faces in this class, and it was easy to find out that there was an extra one for no reason.

"Huh?"

"Yes... I'm an observer. Xu Mang nodded.

"Astronomy majors?" the blonde woman asked, "Usually astronomy majors come to listen to the lectures, but you may be mistaken, the theory of relativity is only available on Thursdays and Fridays." ”

"Oh..."

"It's okay!" Xu Mang said with a smile: "I'm a very studious person. ”

In the time that followed,

Xu Mang and the blonde woman chatted about some interesting things, but the voices of the two were very small, basically limited to each other's hearings, and in the process of chatting, the blonde woman felt very good about Xu Mang, and then she actually proposed to go to the café after class to sit.

Joke

Xu Mang didn't dare to agree to this request, and he could only sleep on the sofa in this life.

And... I didn't find anything special about this blonde woman, compared to Audrey Hepburn, it was far behind.

"I'm sorry. ”

"I'm married. Xu Mang secretly took out his mobile phone to unlock the screen, and the mobile phone screen was a photo of him and Xiao Man, and it can be seen from the smiles of the two on the photo, and the word happiness is printed on each other's faces.

“...”

"I'm sorry. The blonde woman was a little embarrassed, and said to Xu Mang: "I didn't know you were married." ”

Looking at the disappointed face of the blonde woman, Xu Mang sighed helplessly and said indifferently: "It's not your fault, it's my fault, I deliberately concealed my marriage, if the news of my marriage spreads, single women all over the world will cry for me." ”

I...

This...

The blonde woman's face was full of confusion, and her expression gradually became a little lost.

"Kathy!"

"With the structure of carbon dioxide O=C=O, a straight molecule, let the equilibrium distance between the two adjacent atoms be a, and the elastic force coefficient of the adjacent two atoms is k, what is the Hamiltonian amount? ”

The professor suddenly asked the blonde woman with a confused face.

The sudden question made this girl even more confused, she had been chatting with Xu Mang just now, and then missed a period of time and space, when she came back to her senses, she found that the world had changed, how did she suddenly reach the vibration of the three atomic linear molecules?

Oops,

Completely unknowing.

The blonde girl was a little depressed, and even a little scared at the moment, afraid that her credits would be affected because of this.

Then

Xu Mang silently took a pen and wrote down an equation on a notepad, the general form of the Hamiltonian quantity, but changed according to the structure of carbon dioxide.

Finished,

Xu Mang pointed to the above equation.

After seeing the equation written by Xu Mang, this blonde girl of Casey was a little overwhelmed, she didn't believe that an astronomy student could give an answer to such a professional physics problem, which was definitely unreliable.

However, at the moment I have no other choice...

ultimately

The blonde girl could only follow the equation given by Xu Mang, and slowly walked to the front of the podium, this short journey of about ten seconds has a century long in Casey's spiritual world.

The professor didn't think Casey would be able to write the equation, and the reason why he put her on stage was just to give her a warning not to do something unrelated to the class during class, such as staring at the boy.

In fear,

Casey wrote down an equation that Xu Mang gave her, looked at the professor cautiously, and said, "Professor... All right. ”

“...”

Will she?

Impossible!

Already have this part in advance?

The professor was a little confused when he saw that Casey had written the equation without any mistakes.

"Not bad!"

"It seems that you have already previewed the approximation of quantum mechanics in advance. The professor could only compliment Casey by saying, "Go back." ”

Yes?

This... That's right?

No way?

Hearing the professor's words, Casey, the girl, realized that the boy sitting on her was right... It's the boy who is extremely narcissistic, and he has a little deeper understanding of physics, and it feels like he doesn't have much class, not even a book.

Confused comes,

Confused to go,

Casey still can't figure out why that boy can know this equation and doesn't look like a top student.

Returning to his seat, Casey looked at Xu Mang seriously, the man with the face of the East, looked a little ... The feeling of being cute is the kind of thing that doesn't seek to be motivated, eats and waits for death, and is lazy with a little bit of badness.

Familiar!

It's familiar... I vaguely saw it somewhere, but I just couldn't remember who he was.

"Who the hell are you?" asked Kathy.

"I am who I am... It's a different kind of fireworks. Xu Mang smiled and said indifferently.

Neuropathy!

Casey directly defined Xu Mang as a neuropath, and he was not lightly ill, but... Because of this, I have suffered a lot of damage, a problem that even neuropathy knows, I don't even know, then I don't even have neuropathy.

The class is still going on, but Xu Mang can't stand the sleepy worm in his brain, and there is no way... I can't walk away, I can't listen but I don't want to listen, my willpower is almost wiped out at this moment, and sleepiness finally takes over my whole body.

Xu Mang sat and fell asleep.

It's fragrant, it's heavy, it's beautiful...

+1 Physical Skill

+1 Physical Skill

"When using the variational principle to deal with practical problems, another common method is to approximate the general form of the wave function, and then use the variational principle to find the corresponding energy intrinsic equation. The professor said seriously: "This equation is much easier than the original wave equation, and in the process of solving..."

Halfway through the conversation,

The professor saw a speechless scene, one of the students actually fell asleep while sitting.

But...

At this point, the professor suddenly felt that the sleeping student was familiar.

That's right!

He's Xu Mang, right?

The professor finally remembered who the sleeping young man was, and had seen his picture several times in the journal Nature.

By the way, how did he end up here?

Oh!

A recent press conference.

"Hey!"

"Don't sleep!" Casey hurriedly pushed Xu Mang beside him, and said seriously: "What's the situation with you? Are you crazy? This is Professor Jeff's quantum mechanics class, you don't want to stay in school, right?"

Xu Mang woke up with a cute face, he felt that he had made the two most regrettable decisions in his life, one of which was to marry Xiaoman as his wife, and the other was to come to this classroom to listen to the lecture, this professor called Jeff, his words did not have any tension, and he was a little lifeless.

"This classmate!"

The professor pointed at Xu Mang and said with a serious face: "Can you use other methods to solve the problem of multiple electrons in independent particles?"

I...

Nima!

What's the situation?

Xu Mang was in a daze, and then he was named, for a while he was a little frightened, feeling that he was back in the scumbag period of high school, and was suddenly named by the teacher, and then silently walked out of the classroom to punish the station.

Then

All the students looked at Xu Mang and expressed deep sympathy for him, this guy is too unlucky.

Saying...

Who is this guy?

How come I've never seen him, when did he sneak in?

Wrong

It's a little familiar!

Almost everyone felt that Xu Mang was very familiar, but they couldn't remember who he was, and then they thought about it... Maybe it's because the faces of the Orientals are the same.

This is the same as Xu Mang's feeling that the faces of Westerners are the same, the two sides have entered into the native effect and the alien effect, the native face is always easier to recognize than the unfamiliar foreign face, and it will be more difficult to recognise the face of the alien face.

Of course

There are also cross-cultural differences in face and expression recognition.

"This classmate!" said the professor again, "come up and solve this problem, don't make us wait any longer." ”

Xu Mang shrunk his neck and asked cautiously, "Professor... Can you repeat the question again?"

"There are other ways to solve the problem of multiple electrons in independent particles. "And prove the physical significance." ”

Hearing the words of the professor,

Everyone was stunned, if the front is a difficult level problem, then the back is a death level.

And also to prove the physical significance...

How could it be done.

......