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 equations learned in the classroom, but..."

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

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

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

Is this class exploded?

The final questions in ordinary mathematics exams, such as Fourier transformation, orthogonal expansion, ordinary differential equations, etc., have become conventional tools here. Isn't it difficult?

He didn't say much nonsense, and the teacher started formal class.

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

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

Wait a moment.

He seemed to be asleep!

I fell asleep, really fell asleep!

Ha ha!

Ye Kaifu almost laughed out loud. Seeing that he had the upper hand in "working value", he felt so happy that he almost exploded in his seat.

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

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

"Most of the textbooks today establish the Green function method based on the three-dimensional Laplace equation. The core content is the Green formula in space form and the analytical representation of the three-dimensional harmonic function. The Green function method in two-dimensional problems has similarities to the three-dimensional problem...%@@!"

The content of the lecture is obviously difficult, and even if you are good at it, you cannot directly improve the IQ of the male animals. So much so that the atmosphere in the whole classroom has always been awkward, which is equivalent to a beautiful girl talking to herself on the podium.

The basic knowledge of Green's function method is double integral and triple integral. 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 while I was jumping.

He simply gave up the treatment and did not dare to play with his mobile phone in the first row. It was also good to appreciate the teacher's appearance.

"Oh my God... I finally know why the boss is too lazy to take this class and sent me over."

"What a torment!"

Seeing a pair of confused eyes, a group of sleepy guys, and a little slut who were playing with their phones, Wang Lili, who was standing in front of the blackboard, kept complaining in her heart.

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

So, she seemed to have forgotten that she came here like this back then. Her teacher should be a pig when she treats her.

"Hold on, hold on!"

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

After all, Wang Lili does not have a broad mind like the old professor, who plays with her mobile phones, is dozing off, and still recites scriptures like the old professor.

She was also very upset. I worked hard to prepare lessons, are you playing below?

Why? I can't do it if I let me recite scriptures on it like a nun...

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

that's all!

The boy in the first row looked quite serious, and he sat in the first row from the beginning, and the probability of being a top student was extremely high.

It should be able to answer the questions, just him, no one can hurt his face, and he can still wake up the sleeping people.

"Student, please solve this question!" Suddenly, Wang Lili said with a smile.

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

The person who played with the phone also put the phone back into his crotch...

"What? Is it me?" Ye Kaifu stood up and blushed.

He pretended to study hard, but was named to answer the question.

Very miserable.

real.

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

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

Apart from these words, there seems to be nothing to know.

He kept scratching his head and ears, and his brain was rolling violently.

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

"Oh, sit down, sit down..." Wang Lili didn't expect that the good students in the front row could not answer, so she could only wave her hand in dismay.

Maybe it was because I said it too badly, or maybe these contents were too difficult...

However, the classroom atmosphere has improved a lot.

After just this, everyone else had already arranged their seats, and only a few stubborn people were still sleeping soundly, the kind that was really asleep.

Especially the one on the left side of the first row, Is it so comfortable to sleep? Is it so bad to sleep in the first row?

"Is anyone able to do this question? Just follow the method I just mentioned, use the harmonic function..." Wang Lili reiterated.

The classroom atmosphere was once very awkward.

"Where is this...the classmate on the far left?"

Ye Kaifu quickly patted Zhang Yuan who was sleeping and asked him to jump out of his seat with a "ah".

What's going on?

Zhang Yuan opened his eyes blankly.

A small burst of laughter came out in the classroom.

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

Zhang Yuan blushed and scratched his head embarrassedly.

Due to continuous liver explosion and excessive fatigue, I accidentally fell asleep.

"Classmate, can you do it?"

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

Everyone is adults, and they are responsible for their own lives, and there is no need to over-criticize and correct others.

Moreover, this is just a course arranged by the school for various competitions, and it will not arrange exams, so it has no binding force...

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

Everyone laughed and told the Green function for a class, and even the pig remembered these four words. It turns out that this guy only repeats these words after sleeping for a whole class.

Zhang Yuan paused for two seconds and continued: "Suppose v is another known harmonic function on plane D. According to Green's formula, there is 0=∫∫(v?u/?n-u?v/?n)dδ. After subtracting the two equations, there is... taking into account the boundary conditions..."

“￥@…%￥”

Several academic masters pricked up their ears and vaguely understood what he was talking about.

After thinking about it, it seems to be right, not nonsense.

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

Whispers rang in the classroom.

What's going on?
Chapter completed!