Deep Space Fleet

Beauty teacher Wang Lili slowed down and said, "Well ... today I will teach you some mathematical physics equations. Of course, not the homogeneous equations learned in class, but ..."

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

一 When this sentence came out, there was a sorrow.

Kai Yefu finally knew why the first three rows were gone.

难 Did this course explode!

The finale questions in the flat constants exam, such as Fourier transform, orthogonal expansion, ordinary differential equations, etc., have become conventional tools here, isn't it difficult?

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

"Classmates, I believe that you have already learned homogeneous partial differential equations and non-homogeneous partial differential equations. Because time is limited, we will not review them here ..."

Ye Ye Kaifu had a habitual glance at Zhang Yuan, and found that the great **** was still wandering, and didn't know what he was thinking.

Wait a minute.

好像 He seems to be asleep!

I fell asleep, really asleep!

Oh ha ha!

Ye Ye Kaifu almost laughed and saw that he had the upper hand in "effort value", not to mention how refreshing he felt, the whole person almost exploded in his seat.

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

"I want to learn more."

"Most current textbooks use the three-dimensional Laplace equation as the 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. Similar places ...% @@! "

The content of the speech is obviously very difficult, even if the face value is high, there is no way to directly improve the IQ of male animals. So that the whole classroom atmosphere has always been awkward, which is equivalent to a pretty girl talking to herself on the podium.

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

As a result, I didn't know what the teacher was saying.

He simply gave up the treatment, but did not dare to play with the mobile phone in the first row, and it was good to admire the teacher's face value.

天 "Oh my **** ... I finally know why the boss was too lazy to take this course, and then sent me over."

"What a torture!"

I saw a pair of perplexed eyes, and a group of guys who were dozing their heads, and Xiao Lisan, who was playing with a cell phone, and Wang Lili, who was standing in front of the blackboard, kept talking.

"Is this a class in front of a group of pigs ..."

So, she seems to have forgotten, and she came here like that. Her teacher treats her as a pig.

"Hold on, hold on!"

"Can't help it, so good!"

After all, Wang Lili didn't have the broad minds of a lot of students playing mobile phones, dozing off, and still chanting like the old professor.

She is also very upset in my heart. I have worked hard to prepare lessons. Are you playing below?

Why? Let me read the scriptures like nuns, which my palace can't do ...

Hmm, just name a few people and activate the classroom atmosphere, just wake up the sleeping people!

that's it!

男 The boy in the first row looks very serious, and sitting in the first row at the beginning, the probability of learning hegemony is very high.

I should be able to answer questions, just let him, everyone does not hurt his face, but can wake up the sleeping person.

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

的 The atmosphere in the entire classroom was suddenly solemn. "Name roll" was indeed a nuclear weapon in the classroom. Almost all the sleeping classmates suddenly fell from heaven and quickly returned to the world.

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

"What? Me?" Ye Kaifu stood up and blushed.

He pretended to study carefully, and was named to answer the question.

How bad.

I really do.

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

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

Apart from these words, nothing seems to be going on.

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

I regret that even if his head burst, it would not be possible to solve the problem.

"Hey, sit down, sit down ..." Wang Lili didn't expect that the good students in the front row could not answer, and could only wave her hands in despair.

Maybe it ’s too bad, or maybe it ’s too difficult ...

Alas, the classroom atmosphere is a lot better.

After that, everyone else has already taken a seated position, and some die-hards are still asleep. They are really asleep.

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

"Did anyone do this? Just use the harmonic function as I just said ..." Wang Lili reiterated.

The classroom atmosphere was embarrassing at one time.

呢 "What about ... the leftmost classmate?"

Qi Ye Kaifu quickly took a picture of Zhang Yuan who was asleep, and let him jump out of his seat with a bang

What happened?

Zhang Yuan opened his eyes blankly ~ www.readwn.com ~ There was a small laugh in the classroom.

"The teacher asked you to do the problem!" Ye Kaifu sitting on the side winked and winked.

Zhang Yuan blushed and scratched his head in embarrassment.

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

"This classmate, would you do it?"

Although Li was a little upset, Wang Lili was still prepared to let the classmate sit down and wake him up.

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

Moreover, this is only a course arranged by the school for various competitions, and it will not arrange examinations, it is not binding ...

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

Everyone laughed and talked about the Green's function for one lesson. Even the pigs remembered these four words. Dare to fall in love with this guy for a whole lesson, and only repeat these words.

Zhang Yuan only paused for two seconds and continued: "Let v be another known harmonic function on plane D. From Green's formula, there is 0 = ∫∫ (v? U /? Nu? V /? N) dδ, after the two equations are subtracted there is ... considering the boundary conditions ... "

"￥ @ ……% ￥"

A few school tyrants raised their ears and vaguely understood what he was talking about.

I think about it again and again, it seems to be right, not nonsense.

If a person can really talk nonsense to this level, then he will be arrogant ...

Whispers rang out in the classroom.

what's the situation?

睡觉 A sleeping brother killed them all in seconds!