Chapter 420

Xu mang didn't want to make trouble in the big brother's house. The reason why he ran into other people's classrooms was to see what was advanced in the teaching of Columbia University, which positioned the physics major as one of the most outstanding majors. If so, he would copy it.

There's no way to cross the river by touching Eagle sauce. It's better than crossing the river by touching stones.

However, to Xu Mang's regret, he didn't get any new feeling. Basically, he read according to the textbook, and then analyzed it according to a classic example. He said that he had no characteristics. It was almost the same as what he usually taught.

Xu mang feels very regretful about this. He should go to the library to see how many seats are in the library. Through the analysis of the attendance rate, we can basically judge the teaching quality of this school.

How embarrassing...

it's boring to sit like this.

Xu mang is about to die. At present, he is teaching the calculation approximation method of quantum mechanics. In fact, these things are just like this. The main reason is that he has reached the stage of perfect mastery. It is meaningless to listen to these things again.

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

"Molecules involve not only the motion of electrons, but also the motion of nuclei. In the center of mass coordinate system, the nuclei in a molecule vibrate slightly near their equilibrium positions." According to the pictures projected by the projector, the professor explained the vibration and rotation of molecules to the students.

At this time,

the professor suddenly noticed that one of the more than 40 students was in a daze. The most important thing was that he did not even take his notebook with him, so he sat in a daze.

Although many college students are self-taught, in their spare time is not nest in the dormitory reading, or stay in the library reading, or in the laboratory research, but the most basic etiquette must be achieved.

No textbook, no Notepad, no pen... What class are you going to have?

"Cough!"

"Pay attention to this student." The professor looked at Xu Mang and said seriously, "if you don't bring anything next time, you don't have to come to my class."

The sudden warning is overwhelming. Xu mang is still silent in his fantasy, and then awakened by the professor. In his confusion and bewilderment, Xu mang nods. In fact, his behavior is only subconscious.

The class went on, and it didn't stop because of this incident.

"Hey

"Sister!" Xu mang quietly approached the blonde and said with a smile, "can I share your textbook?"

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

This sister is very ordinary, that is, golden hair, blue eyes, and that's the end... But for Xu Mang, it seems that foreign women are like this. Unless those special Hollywood movie stars, Xu mang can hardly distinguish the appearance of foreign women.

"Why have I never met you? Are you here to listen? " This blonde girl looks at Xu mang curiously. There is no oriental face in this class, so it is easy to find one more for no reason.

"Ah?"

"Yes, I'm in the audience." Xu mang nodded.

"Astronomy major?" "Astronomy majors usually come to class, but you may be wrong. Relativity doesn't come until Thursday and Friday," the blonde asked

"Oh..."

"nothing!" Xu mang said with a smile: "I am a very studious person."

In the following time,

Xu Mang and the blonde chatted about some interesting cultural events, but their voices were very small, basically limited to each other. During the chat, the blonde felt very good about Xu Mang, and then she even proposed to go to the coffee shop after class.

I'm joking,

Xu mang can't agree to this request. He can only sleep on the sofa in his life.

And... There's nothing special about this blonde woman. It's not like Audrey Hepburn.

"I'm sorry."

"I'm married." Xu mang stealthily takes out his mobile phone to unlock the screen. The mobile screen is a photo of him and Xiaoman. You can see from the smile of the two people in the photo, and the two characters of happiness are printed on each other's faces.

"..."

"sorry." "I didn't know you were married," said the blonde, who was embarrassed

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

I...

this...

this blonde woman's face was confused, and her expression gradually became a little lost.

"Casey

"With the structure of carbon dioxide o = C = O, a linear molecule, suppose that the equilibrium distance between two adjacent atoms is a, the elastic force coefficient of two adjacent atoms is k, and what is the Hamiltonian quantity? You come up here and write the expression. "The professor suddenly asked the confused blonde.

The sudden question made the girl even more confused. She had been chatting with Xu Mang, and then missed a period of time and space. When she came back to her mind and found that the world had changed, how could she suddenly reach the vibration of a three atom linear molecule?

Oops,

I don't know at all.

The blonde is a little depressed, and even a little scared at the moment, afraid that her credits will be affected.

At this time,

Xu took a pen in silence and wrote down a section of equation in his Notepad, the general form of Hamilton quantity, but it was changed according to the structure of carbon dioxide.

After writing, Xu pointed to the above equation.

After seeing the equation written by Xu Mang, this golden haired girl of Casey is a little at a loss. She doesn't believe that an astronomy student can give an answer to such a professional physics problem, which is certainly not reliable.

However, she has no other choice at present...

in the end,

in the end, the blonde girl can only follow Xu Mang's equation and walk slowly to the front of the podium. This short ten second road has lasted for a century in Kathy's spiritual world.

The professor didn't think Casey could write this equation. The reason why she still let her on stage was to give her a warning not to do something irrelevant to class, such as staring at the boy.

In a panic,

Cathy wrote down an equation Xu mang gave her, looked at the professor carefully and said, "Professor... OK."

"..."

would she?

No way!

Have you previewed this part in advance?

When the professor saw that Kathy had written the equation, there was no mistake. For a moment, he was a little confused.

"Not bad!"

"It seems that you have previewed the approximation of quantum mechanics." "Go back," the professor said to Kathy

Ah?

This... That's right?

Can't you?

Hearing the professor's words, Kathy realized that the boy sitting in her seat had a deep understanding of physics, that is, the extremely narcissistic boy. She felt that he didn't have much class, even had no books.

In a confused way,

confused,

Kathy still can't understand why the boy can know this equation, and he doesn't look like a Xueba.

Back in her seat, Kathy gives a serious look at Xu Mang, a man with an oriental face. She looks a little bit dull and cute, that is, she doesn't want to be progressive, she eats and dies, and she is lazy with a little bit of meanness.

Familiar!

I'm familiar with... I've seen him somewhere, but I just can't remember who he is.

"Who are you?" Kathy asked.

"I am who I am... It's not the same fireworks." Xu mang smiles and says indifferently.

Insane!

Cayce directly defined Xu mang as a neuropathy, and he was very ill, but... He also suffered a lot of damage. He didn't even know about a problem that he knew. He was even worse than a neuropathy.

The class is still going on, but Xu mang can't hold the head of the drowsy. He can't walk away and listen, but he doesn't want to listen. His willpower is almost wiped out at this moment, and sleepiness finally occupies the whole body.

Xu mang sat asleep.

It is very fragrant, heavy and beautiful...

physical skills + 1

physical skills + 1

"when using variational principles to deal with practical problems, another common method is to approximate the general form of wave function, and then use the variational principle to work out the corresponding energy proof equation." The professor seriously said: "this equation is much easier than the original wave equation, and in the process of solving it..."

halfway through the speech,

the professor saw a silent scene, and a student actually sat and fell asleep.

However...

at this time, the professor suddenly felt that the sleeping students were familiar.

By the way!

Is he Xu mang?

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

How could he be here?

Oh!

The recent press conference.

"Hello

"Don't sleep!" Kathy quickly pushed Xu mang beside her and said seriously, "what's the situation with you? Are you crazy? This is Professor Jeff's quantum mechanics class. Do you want to stay in school

When he woke up, Xu mang was stunned. He felt that he had made the two most regretful decisions in his life. One of them was to marry Xiaoman as his wife, and the other was to attend a class in this classroom. The professor named Jeff had no tension in his words, and he was a bit dead."This classmate!"

The professor pointed to Xu Mang and said solemnly, "can we use other methods to solve the multi electron problem in independent particles?"

I...

NIMA!

What's the situation?

Xu mang was in a daze, and then was named. For a time, he was a little frightened. He felt that he was back in the period of high school dropouts. He was called by the teacher suddenly, and then walked out of the classroom to punish him.

At this time,

all the students looked at Xu Mang and expressed their deep sympathy for him. This guy is too unlucky.

Who is this guy?

Why never? When did he slip in?

No,

a little familiar!

Almost everyone felt that Xu mang was very familiar, but they could not remember who he was. Later, they thought that maybe the faces of the Oriental people were the same.

This is similar to Xu Mang's feeling that westerners' faces look the same. Both sides enter into the ethnic effect and alien effect. The native faces are always easier to recognize than the unfamiliar ones, and it is more difficult to recognize the foreign faces.

Of course,

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

"This classmate!" The professor said again, "come up and solve this problem. Don't let us wait."

Xu mang shrunk his neck and asked carefully, "Professor... Can you repeat the question?"

"Use other methods to solve the multi electron problem in independent particles." The professor said, "and prove the physical meaning."

Hearing the professor's words,

everyone was stunned. If it is said that the front is difficult, then the latter is death.

It is also necessary to prove the physical meaning...

how it can be done.

......

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