Deep Space Planet Leader

beautiful teacher Wang Lili slowed down, opened the mouth and said: "Well... today I will teach you some knowledge of mathematical and physical equations. Of course it is not the homogeneous equations learned in class. But..."

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

As soon as this sentence came out, there was a cry.

Ye Kaifu finally knew why there was no one in the first three rows.

Is this class exploding!

The final questions in ordinary mathematics exams, such as Fourier transform, orthogonal expansion, ordinary differential equations, etc., have become regular tools here, can it be difficult?

Don't talk nonsense too much, and the teacher started to attend the class officially.

"Dear students, I believe you have learned homogeneous partial differential equations and non-homogeneous partial differential equations. Because of time constraints, I won’t review them here..."

Ye Kaifu glanced at Zhang Yuan habitually, and found that this great god was still wandering around and didn't know what he was thinking.

Wait a minute.

He seems to be asleep!

Fell asleep, really fell asleep!

haha!

Ye Kaifu almost laughed, seeing that he had gained the upper hand in terms of "effort value", not to mention how refreshing he was, he almost exploded on the seat.

"Work hard, work hard, I can't make a runaway when he sleeps!"

"I want to take the opportunity to learn more."

"Most of the current textbooks are based on The three-dimensional Laplace equation is used as a background to establish the Green's function method. Its core content is the Green's formula in spatial form and a one-point analytical representation of the three-dimensional harmonic function. The Green's function method for two-dimensional problems is similar to three-dimensional problems...% @@!"

The content of the presentation is obviously difficult, even if it is high-profile, there is no way to directly improve the IQ of male animals. So the whole classroom atmosphere has been very embarrassing, equivalent to a pretty girl talking to herself on the podium.

The basic knowledge of Green's function method is 2nd layer integration and 3rd-layer integration. Ye Kaifu racked his brains, but found that he had forgotten about 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.

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

"Oh my god...I finally know why Boss is too lazy to take this class, and then send me over."

"It's really tormenting!"

Seeing a pair of blank eyes not knowing what to do, and a group of guys dozing off with their heads down, plus the little cripples playing with mobile phones, and Wang Lili standing in front of the blackboard, she kept complaining in her heart.

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

So, she seems to have forgotten, she also came here back then. Her teacher regarded her as a pig.

"Hold it, hold it!"

"I can't hold it anymore, I'm so unhappy!"

After all, Wang Lili is not like the old professor. Students play on mobile phones, doze off, and still read the scriptures with a broad mind.

She is also very upset in her heart. I worked hard to prepare lessons. Are you guys playing here?

Why? Let me recite scriptures on it like a nun. This palace can’t do it...

Well, just call a few people to enliven the classroom atmosphere and wake up the sleeping person!

That's it!

The boy in the first row seems to be serious, and at first sits in the first row, the probability of learning to dominate is extremely high.

Should be able to answer the question, it's him. Everyone doesn't hurt face and can wake up the sleeping person.

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

The atmosphere in the entire classroom suddenly became serious. The "calling" was indeed a nuclear weapon in the classroom. Almost all the sleeping classmates suddenly fell from heaven and quickly returned to Human World.

The person who played with the mobile phone also put the mobile phone back in the crotch...

"What? Is it me?" Ye Kaifu stood up, blushing.

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

It's miserable.

Really.

"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.

Except for these words, it seems that there is not much to know.

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

Unfortunately, even if his head burst, it is impossible to solve this problem.

"Hey, sit down, sit down..." Wang Lili didn't expect. The good students in the front row couldn't answer either, so they waved their hands dejectedly.

Perhaps I said it was too bad, or maybe the content is too difficult...

However, the atmosphere in the classroom is a lot better.

After that, everyone else has already set up their sitting positions, and there are some diehards who are still asleep, the kind who are really asleep.

Especially the one on the leftmost side of the first row, is sleeping too comfortable, right? The first row is still sleeping, the impact is too bad!

"Will anyone do this question? Just follow the method I just said, using the harmonic function..." Wang Lili repeated.

The atmosphere in the classroom was very embarrassing.

"Where is this...the leftmost classmate?"

Ye Kaifu quickly took a picture of Zhang Yuan who was sleeping, and made him jump out of his seat with a loud "Ah" Get up.

What's the matter?

Zhang Yuan opened his eyes blankly.

There was a little laughter in the classroom.

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

Zhang Yuan blushed and scratched his head sorryly.

Because of continuous liver burst and excessive fatigue, I accidentally fell asleep.

"This classmate, will you do it?"

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

Everyone is an adult, and you are responsible for your own life, and there is no need to over criticize and correct others.

Furthermore, this is only a course arranged by the school for various competitions, and no examinations will be arranged. It is not binding...

Zhang Yuan glanced at the PPT and started with a little bewildered head It became clear, he whispered: "It should be done with Green's function..."

Everyone laughed, and they all taught Green's function for a lesson, even pigs remembered These four words. Dare to love this guy slept for a whole class, only repeating these words.

Zhang Yuan only paused for two seconds, then continued: "Let v be another known harmonic function on plane D. From Green’s formula, 0=∫∫(v∂u∂nu ∂v∂n) dδ, after the two equations are subtracted, there is...Considering the boundary conditions..."

"￥@……%￥"

He raised his ears and vaguely understood what he was talking about.

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

If a person can really talk nonsense to this level, it will be a big break...

There are whispers in the classroom.

What's the situation?

A sleeping brother killed them all in seconds!