The Q&A room is full.

The juniors who are interested in going to graduate school are concentrating on revision with their heads buried in their heads.

Next to the lectern, sitting was Tang Zhiwei, a professor of the Department of Mathematics of the University of Jinjin, who had put down the newspaper in his hand at this moment, and was meticulously staring at the topic on the scratch paper, and the fingers of his right hand turned the cap of the fountain pen back and forth.

Lu Zhou, who was standing next to him, knew very well that this small action meant that he was stuck in thought.

“…… Where did you get the questions? After staring at the calculations on the scratch paper for a long time, Tang Zhiwei suddenly asked.

"There is a mention of the Fourier coefficient in the reference book, so I went to the library to look up the relevant materials, and found that there are several variants of the Fourier inversion theorem, as well as the application of several variants, so I tried to derive this, and found that I couldn't solve it at this step." Lu Zhou smiled embarrassedly, with an expression of trouble on his face.

Tang Zhiwei glanced at Lu Zhou, his eyes continued to turn to the scratch paper, this time he put down the pen cover, but picked up the chalk, walked to the blackboard and paused, reaching out to type the draft on the blackboard.

Lu Zhou stared at the blackboard intently, perhaps because he had done this homework beforehand, he found that he was unexpectedly able to keep up with the teacher's rhythm.

Attracted by the sound of chalk on the podium, the juniors and seniors who were sitting below to review high math raised their heads from time to time, looked at the calculations on the blackboard with a blank face, and then quickly buried their heads again.

emmm……

What the hell is this?

Time passed minute by minute, and before I knew it, the entire blackboard was full.

Writing from the upper left corner of the blackboard to the lower right corner of the blackboard, Tang Zhiwei stopped writing, turned around, looked at Lu Zhou and asked, "Understand this part?" ”

Lu Zhou, who was staring at the blackboard seriously, nodded: "Understood." ”

Tang Zhiwei raised his eyebrows and asked, "Do you really understand or not?" ”

Lu Zhou said: "I really understand." ”

Tang Zhiwei didn't speak, picked up the blackboard eraser, wiped off the things on the blackboard, picked up the chalk and continued to write the next step, but the evaluation of Lu Zhou in his heart dropped by half a point.

There are two kinds of students he hates the most in his life, one is to give him a gift to change his score, and the other is to take a super-outline topic in front of him and pretend to ask for advice.

The latter, in particular, is a pure waste of his time!

Obviously not interested in mathematics, but still have to put on a very researched appearance, it's disgusting to watch! This kind of person only thinks about getting close to the teacher all day long, and doesn't understand what he is studying for?

At the end of the writing, there were still a few lines left to write, Professor Tang Zhiwei suddenly stopped, looked back at Lu Zhou, and suddenly smiled and said, "I have calculated this step, you should understand, right?" ”

Lu Zhou nodded: "Understood...... Thank you, teacher! ”

Chen Yushan, who was sitting in the corner of the first row reviewing advanced mathematics, had been secretly looking at the two people on the podium, listening to the two of them "Understand?" "Got it." 's communication, my mind is full of fog.

What do you understand?

What are they communicating?

Realizing that she simply couldn't understand their conversation, Chen Yushan despaired of her math.

Don't...... Am I actually a scumbag?

Hearing Lu Zhou's answer, Tang Zhiwei smiled, gently put the chalk on the lectern, returned to the chair and sat down, picked up the thermos flask, took a sip of tea, and said slowly: "Really understand?" Then you can write the rest for me. ”

You know a!

When Lao Tzu wrote, he stood there like a second fool, and he didn't even take a note, if you can understand this, Lao Tzu will eat this cup!

Looking at Professor Tang Zhiwei's expression, Lu Zhou understood in an instant, the professor suspected that he didn't listen to it at all, and he was testing himself!

Thinking of this, Lu Zhou couldn't cry or laugh in his heart.

The conscience of heaven and earth, I really understand!

He didn't know why, when Professor Tang was performing calculations on the blackboard, the formulas were so familiar to him, he always felt that he had seen them somewhere, but he couldn't tell where?

Is it because the knowledge of the system's point exchange covers this part of the knowledge points? Or is it because your math experience has increased, and your sense of math has improved?

In short, he did understand.

Lu Zhou didn't know the specific reason, but it was obviously not the time to think about it, Professor Tang was still waiting for him to perform leisurely, in order to publish that paper logically next semester, he couldn't make a mistake at this juncture.

I saw Lu Zhou smile confidently, picked up the chalk and walked to the blackboard.

Professor Tang's eyebrows jumped, and he said in his heart, "This kid can't really write out the rest of the steps, right?"

No way.

When pigs fly!

Even if he has completed most of the proof process, the remaining few lines of calculation are definitely not something that a freshman can complete! Even the graduate students he brought had to ponder his proof process several times from beginning to end before they could figure out the doorway!

And this guy, but when he listens to the lecture, he doesn't even take notes!

As time passed, the surprise in Professor Tang's heart had turned into a deep shock, and finally into approval.

All doubts are like snow on the eaves of spring, the ice melts and melts at the moment when the sun shines.

When Lu Zhou wrote the last symbol on the blackboard, Professor Tang, who stared at the blackboard intently, nodded approvingly: "Not bad...... Very well written. ”

The solution of the last few steps is slightly different from his thinking, and it is a little cumbersome, but it is also a novel idea. This shows that he not only listened to what he said, but also incorporated his own thinking into it.

And this is the most commendable.

It seems that he blamed him......

"Thanks to the teacher's guidance, if it were me, I wouldn't have been able to get to this point......" Lu Zhou smiled embarrassedly.

He wasn't lying, and the system gave a lot of calculations like "a=b", but didn't explicitly tell him why the two could be equalized.

And what he asked Professor Tang for advice was the concrete proof of this part.

"Don't be modest with me, I can see your level," Professor Tang continued to ask, "Which class are you from?" ”

"Freshman class, Lu Zhou." Lu Zhou answered truthfully.

"Lu Zhou......" Professor Tang nodded and recited silently a few times, as if to memorize the name.

It turns out that this senior's name is Lu Zhou......

Chen Yushan, who was sitting in the corner eavesdropping, nodded suddenly, and suddenly felt that something was wrong, and then reacted.

Big, freshman?!

Thinking that she had called him a senior for a long time, Chen Yushan's face turned red, and her whole person was like an ostrich, and her head hit the table.

It was not only Chen Yushan who was shocked in her heart, but also the seniors in the first row of the Q&A room who looked at this junior a few times with a confused face, and ran over 10,000 alpacas in their hearts.

Are all the current freshmen so good?

Don't let people live!

"You're going to take the high school exam, right? How's the review? ”

"I'm almost done with the review, so I want to read some extracurricular books." Lu Zhou smiled shyly.

"Heh, let you take that paper, I'm afraid I'll underestimate you." Tang Zhiwei laughed and joked, "Why don't I give you a separate paper to do?" ”

"Don't, teacher, you're going to die!" Lu Zhou couldn't cry or laugh.

"Hmph, can you still die if you do a question? I don't believe it. Tang Zhiwei glanced at Lu Zhou up and down a few times, and nodded approvingly, "Yes, very good, I rarely praise a student like this." If it weren't for the fact that you're only a freshman, I'd really like to say hello to the people in the Academic Affairs Office and transfer you to my office for research. ”

"Teacher, you have promoted me, I still need to learn a lot of things, if I really want to do research with you, it will definitely be a drag on you." Lu Zhou knew that Professor Tang was joking, so he said modestly.

Tang Zhiwei snorted and criticized: "Hmph, don't come to me with those polite words, those who do academics should do their studies well, don't always put those scenes in your stomach." ”

Although he was criticized for some reason, Lu Zhou knew that Professor Tang was not really angry, but really regarded himself as his student and was teaching himself.

When the old gentleman was angry, he was definitely smiling. For example, when he was writing on the blackboard just now, he mistakenly thought that he was pretending to be there to engage in fake knowledge, he must have been angry.

"The teacher is right, I know."

Looking at Lu Zhou's sincere expression, Tang Zhiwei nodded, his tone softened a little, and continued: "It's a good thing to be interested in mathematics, I hope you can continue to keep it up." Also, the direction you chose is good, although it is not a popular direction, but it is easy to get results. If you have any good ideas, you should do it boldly, and if you don't understand it, you will see and ask more, and learning is how it comes out, and maybe you will be able to discover something that others can't find. ”

After a pause, Professor Tang continued: "Although the mathematics department of our golden university is not very strong, the physics department still has nothing to say. The application of Fourier transform is still quite wide in the fields of spectrum analysis and data compression and orthogonal frequency division multiplexing, and if you make a difference in this area, I believe that by the time you are in your senior year, a few professors in the physics department next door will definitely rush to ask for you. ”

Speaking of this, Professor Tang smiled and said, "Learn more, watch more, practice more, and study more." That's all I have to say nonsense, you go down and ponder it yourself, and I won't delay your time anymore. ”

"Thank you, Professor! What you say from the bottom of your heart, students take to heart. Lu Zhou said sincerely.

"Don't talk about the scene, what did I just tell you? If you want to thank me, just say thank you, and get out of here when you're done, and you want me to get up and send you? Tang Zhiwei scolded with a smile.

Lu Zhou smiled, turned around and walked out with scratch paper and pens, and closed the door of the Q&A room.

Looking back at the blackboard, Tang Zhiwei smashed his mouth and sighed, feeling a strong emotion in his heart.

Jinling is worthy of being the ancient capital of the Six Dynasties, and the people are outstanding.

Our Jinda stands on this dragon vein, it is really talented!

The undergraduates in the audience looked confused, looked at the dazzling calculations on the blackboard, and then looked at their workbooks, and their hearts were mixed.

I'm afraid I'm going to a fake university......