Seeing the boy opposite him fall into silence and thinking, a flash of joy flashed in Qi and Mo's eyes.
This question is not about finding the partial reciprocal in their advanced mathematics this semester, but about a second-order partial differential equation (PDE), also known as a mathematical physics equation.
It is a compulsory course for sophomores and above in many science majors, or an elective for juniors and above in engineering majors.
Of course I haven't learned the art of lacquer and ink yet.
No matter how studious you are, you still have to have a degree, right?
So she just wanted to embarrass this boy - aren't you a good teacher? Then try the super-class problem.
…
As the boy's frown deepened, the paint and ink became more and more...
happy!
But even though she was happy, she was a little worried...
You won't go too far, right?
Then, she saw...
The boy pulled down his mask, took a sip of water, rolled up his sleeves, and then wrote on the paper...
untie:
Let u(x,t)=X(x)T(t).
Ordinary differential equations satisfied by X(x) and T(t): X″(x)+λ2X(x)=0 T″(t)+a2λT(t)=0
Qi and Mo's eyes widened instantly!
?
…
Ye Ming quickly finished writing a piece of manuscript paper.
Immediately afterwards, he immediately took out his manuscript paper, but just when he was about to continue the analysis, he suddenly felt that something was wrong with the girl's eyes.
Looking up, the girl's eyes were filled with shock and disbelief.
This look made him immediately awake and alert.
Is this girl here to test herself on purpose?
So he hesitated for a moment and wrote on the manuscript paper: "Although it takes time to analyze all the solutions, after finding the special solution, you still need to expand the Fourier series. How about... I teach you the method?"
After he finished writing, he pushed the manuscript paper over.
I saw the girl take the manuscript paper, her eyes stayed on the manuscript paper for ten seconds, then she slowly exhaled and wrote hard.
"Thank you, I'll take a look at the teaching materials and videos first."
"Oh, let's talk about it if necessary."
After finishing writing, Ye Ming saw that he still had a few steps to find the special solution, so he simply turned over the manuscript paper, skipping the analysis step and directly finding the special solution.
After all, even if you guessed that the girl was deliberately testing herself, you still have to have an answer after you finish the question.
After handing the manuscript paper to the girl, Ye Ming smiled at the girl and put on the mask again.
Today, even the King of Heaven and I cannot disturb his study!
Then...the phone buzzed.
The incoming call displayed Peng Xiaofei's profile picture. Ye Ming hung up the call unceremoniously and clicked on WeChat.
"Come to the Science and Technology Activity Center, there's going to be a fight."
Ye Ming was stunned for a moment, played a? and then immediately clicked into the team group.
I saw Li Dongsheng @ everyone in the group and asked everyone in school to go to the fifth floor of the activity center. Their territory was taken away by the RM team, and they even made rude remarks and insulted the team.
Ye Ming frowned and sighed after a few seconds of silence.
We are all civilized people... fighting will definitely not be a problem.
But you still have to go.
So he reluctantly closed the book and stood up again.
…
Although Qi and Mo took over the paper, their thoughts were not on the paper at all.
All she could think about was how Ye Ming looked when he was doing the questions seriously just now.
Is there really such an awesome person?
Is he really a freshman?
No...it should be a freshman...
Because he took off his mask when he was doing the questions just now.
Judging from his appearance, he is not very old.
As for looks, let me ask...
Which girl would think that a boy who solves problems seriously is not handsome?
Just when Qi and Mo were in complicated moods, she saw that the boy seemed to be leaving.
The heartbeat speeds up instantly at this moment.
She only hesitated for a moment before deciding to follow her instinct.
She looked at the boy and said the first words in the exchange between the two.
“Can you add me on WeChat?”
…
The Science and Technology Activity Center is not far from the library, and Ye Ming arrived before he even had time to think about how to greet the girl named "Feng Xi" on WeChat.
Well, in fact, the more reason is that that guy Peng Xiaofei has been harassing him and reporting the "battle situation" to him.
The current situation is that Li Dongsheng had a serious quarrel with a vice-captain on the opposite side.
Walking up to the fifth floor, Ye Ming heard Li Dongsheng's voice while he was still outside the door.
"Get out! It's not easy for anyone to come today!"
"Li Dongsheng, your team is about to be disbanded, what's the point of causing trouble for me?"
"Cao Junwen, you are paralyzed!"
Then there were voices from both sides trying to stop the fight...
"Hey, don't do it..."
Ye Ming pushed open the door.
I saw a group of people gathered in the middle of the wide venue, and Li Dongsheng was twisted into a ball with a boy opposite.
In the venue, several obstacles were built with various simple materials, and two mechanical tanks the size of basins were parked in the venue.
There are also small acrylic balls the size of soybeans scattered around.
Ye Ming bent down to pick up a small ball and walked towards the crowd.
Then he saw Peng Xiaofei hugging Li Dongsheng and saying something in his ear. Li Dongsheng stopped struggling and looked towards him.
"Captain." Ye Ming approached, glanced at the opposite side first, and then asked softly: "Why did the fight start?"
Li Dongsheng spat hard: "For the RM team, the upstairs was originally their preparation hall, but it turned out that it was not enough, so they came to us without saying anything, and they even said we didn't need it. Damn it!"
"You don't need it in the first place! The schools next door have been preparing for the competition for a long time. You haven't said anything for a long time and you have to make major changes to the plan. We will have a school team league at the end of March. What's wrong with using it first? Ah? Why?
Already?" The man named Cao Junwen on the other side was not someone to be trifled with, so he directly replied.
"Who says we haven't done anything? I'm going to use it soon."
"Pretend, keep pretending."
At this time, the door was pushed open again, and a serious voice sounded.
"What's the fuss about?"
Everyone looked at the door at the same time, and then suddenly stopped.
Because here are Professor Chen Xiaofang, the instructor of the RM team, and Teacher Zhang from the Youth League Committee.
One is the leader of the team.
One is the "financier father" on both sides.
No one can afford it.
…
Five minutes later, the two teachers who figured out the situation stood in the middle of the crowd. After exchanging glances, Teacher Zhang from the Youth League Committee coughed lightly.
"In this way, although the venue on the fifth floor belongs to the RC team, the RM team is in a special situation now and has two competitions waiting for them. They are preparing for the competition upstairs. They need a large environment and venue, so the challenge venue is not enough.
Now... we will have a 3V3 challenge in colleges and universities at the end of the month..."
Following Teacher Zhang's voice, the expression on Li Dongsheng's face turned red instantly.
Not just him, every member of the RC team had indignation written all over their faces.
What is this? A bias?
Or, in the eyes of the school youth league committee, have we become outcasts?
"Li Dongsheng." Teacher Zhang was a female teacher. She felt Li Dongsheng's resentment and anger very sensitively. She frowned and said, "Don't be like this. Your competition is still early anyway. It only starts in May."
"Teacher Zhang, we really need to prepare a competition venue! This year's rules are very complicated and highly confrontational, so we need to prepare as early as possible."
Facing the "financier father" who gave the money, Li Dongsheng suppressed his anger and begged, even though he was unwilling to do so: "And we are very confident that we will win the prize this time!"
It's okay if he didn't say this, but once he said it, everyone on the other side had weird expressions.
In the crowd, someone whispered, "If you don't shave your head, you'll be a loser."
Li Dongsheng's face turned red again.
At this moment, a voice came calmly from outside the crowd.
"Let's do this. At this time next weekend, we will build a robot and challenge you to a duel. Whoever loses will give in."
Li Dongsheng instantly looked at the source of the sound.
I saw Ye Ming standing up from next to one of the tanks.
