After a thousand years of trading, start a million barrels of oil

Chapter 53
The students looked at the questions given by the professor and were a little confused.

What kind of fairy question is this? After all, they are students of Sichuan University, 985 plus 211 plus double first-class,
Although he was only a freshman, he was selected from thousands of troops, especially in mathematics and science, with excellent results in the college entrance examination.

But now, they can't even understand the topic that the professor released,

Except for this 'Fourier series', they know that it is the Fourier series mentioned today, and they have never heard of other key terms.
What is "time-varying fine integration" and what is "periodic coefficient Riccati differential equation", these are the concepts taught in which class, why have I never heard the professor say it.

In amazement, he couldn't help turning his eyes to Jiang Fan again.

My friend who is rubbing the class, what kind of master are you or did you offend the professor?

Why did the professor suddenly ask you such a difficult question? If you can answer it, then you are really awesome.

There are also some students who have guessed the clue. They have been following the professor in class, so they naturally know the professor's temperament.

Although I didn't notice Jiang Fan and Lin Wan talking in a low voice, after all, their voices were really very low.
But Jiang Fan's cell phone rang accidentally and he was "hello" when he arrived at the door and before he went out, they paid attention to these two details.
Now that the professor is targeting this boy so much, it is likely that the professor has an opinion, so he deliberately asked such difficult questions to make things difficult for the boy.

Hey, it hit the muzzle of the gun.

But it's not bad, high math class is tiring and boring.

Having such a dear friend come to enliven the atmosphere, and the drowsiness that just woke up disappeared immediately, refreshing the mind.

But at the moment, Lin Wan is the one who is the least disturbed in my heart,

Damn it, professor, why don't you be so ruthless and directly give Brother Fan such a hell-difficult question,
Even if she can't understand, but she only finished her freshman year of high mathematics last year. If concepts such as Taylor's formula, Lagrange theorem, and Fourier series are put in front of her,
She still has some impressions, at least she can remember that she seems to have learned it.

What can be taught about 'time-varying fine integral' and 'periodic coefficient Riccati differential equation' in this topic,
What the hell is this, I have never heard of it!
For such a question to be answered by a brother who has not even gone to college, it is not embarrassing for him,
Although I don't know how Brother Fan answered the first two questions, but this question and the two questions about memorizing concepts can be known to be not of the same order of magnitude.

Brother Fan, this is my fault, I shouldn't have talked to you,
But you are already very good at answering the first two questions correctly. If you can’t answer this question, you can’t

At worst, the professor will say a few words, it's fine.

At this moment, Jiang Fan looked at the topic but began to think. He naturally knew that the professor was deliberately embarrassing him.

After all, the knowledge patch that Mr. L gave him not only contains all the knowledge, but also the information about which grade each knowledge is usually taught in the teaching system thousands of years ago.

So he is very clear that the knowledge and application skills involved in this question are not something that a freshman can possess, at least a graduate student or above can almost get in touch.

But his current focus is not on this. This is the first time in his life that he tries to solve a professional-level or even academic problem.

It's nothing like those specially designed mock practice problems you solve in high school,
Although it is assisted by the knowledge patch, the feeling is really my own and cannot be faked.
Moreover, the content in the knowledge patch will be transformed into his own sooner or later, so it is equivalent to him solving the problem himself.

After Jiang Fan read the questions carefully, he began to use the knowledge in the knowledge patch to solve the questions.
But after thinking about it for a while, he found that this question is indeed not that simple, and it is far from being able to solve it directly as long as the corresponding concepts are called up like the first two questions.

He mobilized his brain to constantly interact with the content of the knowledge patch, trying to solve this problem with the help of different paths and ideas.

Gradually, he seemed to enter a state of flow,
Time seems to be frozen at a certain moment, the whole world is only him and this topic, letters, symbols and numbers are flying in the air,

These letters, symbols, and numbers are constantly colliding and combining, and when the combination fails, they scatter in an instant, and then look for other letters, symbols, and numbers to make combinations.

Countless combinations condense and disperse, and time passes by every minute,

Suddenly, Jiang Fan found that there seemed to be a place in the chaos that shone with a pale golden luster.

Looking around, it is a series of small digital formulas,

It's short, but it seems so solid,

Jiang Fan caught it and put together other letters, symbols and numbers with it as the center. There were failures, but there were also successes.
Gradually, this string of formulas became more and more full, and the probability of success when piecing them together became higher and higher.

Not only that, with this formula as the core, several sub-formulas and derivative formulas were generated around it,

Then some principles, arguments and other things are also formed around,

Finally, with the initial short formula as the starting point, a complete set of problem-solving framework and ideas are formed in the whole surrounding area.

Jiang Fan's gaze shone brightly, and he immediately exited the flow state.

"Professor, can I answer on the blackboard?" Jiang Fan asked.

The professor was taken aback when he heard this. He had seen Jiang Fan standing there dumbstruck,
I thought he must have been stumped and had no idea, and there was a high probability that he couldn't even understand the topic.

After waiting for him for a while, the professor also asked him, "Can you figure it out? If you can't figure it out, just say it." '

As a result, the other party did not respond.
The professor couldn't say anything more, so he had to wait for him again.
Looking at the passage of time, he is still in class after all, it is impossible to keep him in a daze forever,

The professor is going to let the boy sit down directly. If the boy insists on using this kind of delaying trick, he just refuses to admit that he can't,
Then he really has nothing to do, so don't waste any more time on this matter.

As a result, the professor was about to wave his hand to tell him to sit down, but Jiang Fan spoke before him, and directly asked to answer on the blackboard.
This directly exceeded the professor's expectation. Was he really thinking just now?
(End of this chapter)