Deep Space Fleet

The beautiful teacher Wang Lili slowed down, and said: "Well... Today I will teach you some knowledge about mathematical and physical equations. Of course it is not the homogeneous equation that I learned in class, but..."

"Today we will focus on learning content: the Green's function method of the two-dimensional Laplace equation..."

As soon as this sentence came out, there was a lot of mourning.

Ye Kaifu finally knew why the first three rows were empty.

Did this course explode!

The final questions in the usual mathematics exams, such as Fourier transform, orthogonal expansion, ordinary differential equations, etc., have become routine tools here, can it not be difficult?

Without talking too much nonsense, the teacher began to formally teach the class.

"Students, I believe that you have already learned homogeneous partial differential equations and non-homogeneous partial differential equations. Due to time constraints, I will not review them here..."

Ye Kaifu glanced at Zhang Yuan habitually, and found that the great god was still distracted, not knowing what he was thinking.

Wait a moment.

He seems to be asleep!

Asleep, really asleep!

Ha ha!

Ye Kaifu almost laughed out loud, seeing that he had the upper hand in "effort value", not to mention how cool he was, he almost exploded in his seat.

"Work hard, work hard, I can't desert him when he sleeps!"

"I'm going to take the opportunity to learn more."

"Most of the current textbooks use the three-dimensional Laplace equation as the background to establish the Green's function method. The core content is the spatial form of Green's formula and the one-point analytical representation of the three-dimensional harmonic function. The Green's function method for two-dimensional problems and three-dimensional problems have Similar places... %@@!"

The content of the speech is obviously difficult, even if the appearance is good, there is no way to directly improve the IQ of the male animals. So much so that the whole classroom atmosphere has been very awkward, which is equivalent to a beautiful girl talking to herself on the podium.

The basic knowledge of the Green's function method is the double integral and the triple integral. Ye Kaifu racked his brains, but found that he had almost forgotten it a long time ago, and had to skip some content from time to time.

As a result, I didn't know what the teacher was talking about while dancing.

He simply gave up the treatment, and didn't dare to play with his mobile phone in the first row. It would be good to appreciate the teacher's appearance.

"My God... I finally know why the boss didn't bother to take this class, and then sent me over."

"It's really tormenting!"

Seeing a pair of bewildered eyes, a group of guys dozing off with their heads buried in their heads, and little bastards playing with their mobile phones, Wang Lili, who was standing in front of the blackboard, couldn't stop complaining in her heart.

"This is completely teaching a group of pigs..."

So, she seems to have forgotten that she came here in the same way back then. Her teacher should treat her like a pig.

"Hold it, hold it back!"

"I can't help it, I'm so upset!"

After all, Wang Lili is not as broad-minded as the old professor, where a large number of students play mobile phones, doze off, and still chant sutras.

She is also very upset, I have worked so hard to prepare lessons, are you guys playing down there?

Why? Let me chant scriptures on it like a nun, I can't do it...

Well, let's call a few people to enliven the classroom atmosphere, and wake up the sleeping ones!

that's all!

The boy in the first row seemed quite serious, and since he sat in the first row from the beginning, he had a very high probability of being a top student.

He should be able to answer questions, let him alone, everyone will save face, and he can wake up sleeping people.

"This classmate, please come and solve this problem!" Suddenly, Wang Lili said with a smile.

The atmosphere in the classroom suddenly became serious, and the "roll call" was indeed a nuclear weapon in the classroom. Almost all the sleeping students suddenly fell from heaven and returned to the world quickly.

People who play with mobile phones also put their mobile phones back in their crotches...

"What? It's me?" Ye Kaifu stood up, blushing.

He pretended to study hard, but was called to answer the questions.

So miserable.

real.

"This classmate, first consider..." Wang Lili reminded a few more words.

"That, this...Green's function...two-dimensional Green's function..." Ye Kaifu said weakly.

Apart from these few words, there seems to be nothing else.

He kept scratching his head and touching his ears, his brain churning violently.

Unfortunately, even if his head exploded, it would be impossible to solve this problem.

"Hey, sit down, sit down..." Wang Lili didn't expect that the good students in the front row couldn't answer, so they could only wave their hands dejectedly.

Maybe it's because I said it too badly, or maybe the content is too difficult...

However, the classroom atmosphere is much better.

After doing this, everyone else had already settled into their sitting positions, and only a few diehards were still fast asleep, the kind that really fell asleep.

Especially the one on the far left in the first row, sleeping too comfortably, right? The first row is still sleeping, the impact is too bad!

"Is there anyone who can do this problem? Just follow the method I just said, using the harmonic function..." Wang Lili reiterated.

The classroom atmosphere was once awkward.

"Where is... the student on the far left?"

Ye Kaifu quickly patted Zhang Yuan who was sleeping soundly, making him jump up from his seat with an "ah".

What's going on?

Zhang Yuan opened his eyes blankly.

There was a small burst of laughter in the classroom.

"The teacher asked you to do the problem!" Ye Kaifu, who was sitting on the side, winked and was so happy.

Zhang Yuan blushed and scratched his head in embarrassment.

Because of continuous liver explosion and excessive fatigue, he accidentally fell asleep.

"This classmate, can you do it?"

Although she was a little unhappy, Wang Lili was still going to let the classmate sit down and just wake him up.

We are all adults, and we are responsible for our own lives, and there is no need to criticize and correct others excessively.

Moreover, this is just a course arranged by the school for various competitions, and no exams will be arranged, so there is no binding force...

Zhang Yuan glanced at the PPT, his somewhat deluded head began to become clear, and he whispered: "It should be done with Green's function..."

Everyone laughed, and they all talked about the Green's function for a class, and even the pigs memorized these four words. This guy dared to sleep through the whole class, only repeating these few words.

Zhang Yuan just paused for two seconds, and continued: "Assume v is another known harmonic function on the plane D, from Green's formula, there is 0=∫∫(v?u/?n-u?v/?n) dδ, after subtracting the two equations, there is... considering the boundary conditions..."

"￥@...%￥"

Several top students pricked up their ears and vaguely understood what he was talking about.

After much deliberation, it seems to be right, not nonsense.

If a person can really talk nonsense to this level, then it will be amazing...

There were whispers in the classroom.

what's the situation?

A sleeping brother killed them all in seconds!