Section 276

Looking from the outside to the inside, you can see that the classroom is almost full, whether it is in the seats or in the aisles, and outside the door, there are quite a lot of people queuing up, wanting to go in. Fortunately, the school has also arranged members of the student union to maintain order. The classroom is already full, so they are stopping others from entering.

"It's full! No more people can go in!"

The student union officer at the door shouted.

"How many more people can go in!" The person at the door said unwillingly.

At this time, Xiao Yi also came up, patted the shoulder of the outermost person, and said, "Please make way."

The man said impatiently, "Don't squeeze, don't you see that the student union people won't let us in?"

Xiao Yi said helplessly, "But without me, this class can't be held."

The person in front immediately turned his head and said unhappily, "Do you think you are Xiao Shen... Oh my god, really Xiao Shen?!"

As soon as he turned his head, he immediately recognized that the person standing behind him was Xiao Yi, right?

His shout also made all the students present look over and then shouted: "Xiao Shen!"

"Please make way for me, I have to go in for class." Xiao Yi said.

Everyone was at a loss as to whether to laugh or cry. The teachers who were supposed to be in charge of the class were blocked outside.

However, they soon made way for Xiao Yi.

But when Xiao Yi walked to the door, someone couldn't help but shout: "Xiao Shen, we also want to listen to your class!"

Others also said the same thing.

Xiao Yi turned his head helplessly, thought about it, and said to the students: "I know everyone wants to take my class, and even takes out their free time to take classes here."

"I am very grateful for your love for me."

"But in fact, this class is just my first class, and I don't know how it will go."

"So you are probably here just for my fame."

"In fact, this is unnecessary."

"Taking classes is not about chasing stars. I am not a star, nor an Internet celebrity."

"So I hope that you come to class because I teach well, and you can learn knowledge from my class, not because of my fame."

"Of course, if I teach well, I will also record the content of my class in the future, and you can also learn from those videos when you study."

"As for today, please leave for now."

What else can the students say after hearing Xiao Yi say this?

Although it is a bit regrettable, the admiration for Xiao Yi has deepened.

Not a star, not an Internet celebrity, but a real teacher! Scholar!

As the students at the door left, Xiao Yi breathed a sigh of relief.

I have to plan carefully for the next class to avoid such a thing happening again.

He thanked several officers of the Student Union.

Then, Xiao Yi officially entered the classroom.

Looking at so many students in front of him, there were probably more than 400 students in the seats and in the aisles.

However, at this moment, applause suddenly sounded in the classroom.

Someone shouted: "Xiao Shen, you just spoke so well!"

Obviously, they all heard Xiao Yi's speech at the door just now.

Xiao Yi smiled and said: "Of course, what I said outside just now is also for you."

"I guess many of the students at the scene came here for my reputation."

"Maybe they are not even from the Department of Mathematics."

"In short, I hope you can spend your time on your own major."

"Otherwise, I'm afraid that your teachers in your major will come and scold me for misleading students."

There was a laugh in the classroom.

At this time, the bell rang.

Xiao Yi sighed for a moment.

In the past, when he heard this bell, it was to acquire knowledge.

But now, it has become to impart knowledge.

"Okay, students, class!"

Chapter 236 Hello, teacher!

"Students, class!"

As Xiao Yi announced the start of the class, many students in the audience stood up at the same time, bowed and shouted: "Hello, teacher!"

Seeing this scene, Xiao Yi was a little amused.

Generally speaking, there is no such link in college classes, but these students actually have such a tacit understanding.

However, facing such a scene, he also bowed slightly to these students and said: "Students, please sit down."

"Thank you, teacher!"

Then, all the students sat down, and those who had no seats could only sit on the steps or on the floor.

Xiao Yi felt a sense of emotion in his heart, as if he had returned to primary and secondary school.

Then he stopped thinking and said, "Okay, this class is number theory. According to the original plan, this class is for students in Hua Luogeng's class."

"So our course will be relatively difficult."

Xiao Yi did not give in because there were still a bunch of students in the classroom who might not even know what number theory is. After all, he was mainly responsible for the students in Hua Luogeng's class.

The progress of the class must not be left behind.

"Then let's get to the point."

"Students in Hua Luogeng's class, I think you all have a certain foundation in number theory. I believe you have a certain understanding of elementary number theory. So, in this lesson, I will start with something that may be more interesting to everyone. Talk about it.”

Xiao Yi turned around and wrote two words on the blackboard.

【Prime number】

In fact, as soon as the first word appeared, most of the students in the classroom showed quite excited expressions.

Prime numbers, for those who are interested in studying mathematics, who is not interested?

Moreover, especially the teacher in front of them, he has successively won the twin prime number conjecture and Goldbach's conjecture, two major mathematical masters of prime number conjecture.

What will happen if this person talks about prime numbers?

"Number theory is a mathematical theory that studies the properties of integers. Therefore, in English, number theory is also directly translated as number-theory. It is also considered the purest mathematics in the entire field of mathematics."

"As Gauss said back then: Mathematics is the queen of science, and number theory is the queen of mathematics."

"Looking at all integers, we will find that there is a type of integers with very peculiar properties. They are prime numbers, also called prime numbers."

"Their peculiar property is that they are only divisible by 1 and themselves."

"So, it is precisely because of this peculiar property that mathematicians have been attracted to study prime numbers for thousands of years."

"Of course, at this time, some classmates may want to ask."

“What is the point of studying prime numbers?”

"What help can studying this thing bring to us humans?"

"Of course, if it is in modern times, then I would like to talk about RSA encryption. RSA encryption uses the principle of prime factor decomposition to implement encryption. You can go back and study the details."

"But at this time, someone may want to ask again. RSA encryption only appeared with the advent of the computer age. So why did mathematicians study prime numbers when there were no computers, and even earlier?"

"Actually, before this, people's means of public opinion were very limited. They did not have computers or mobile phones to play with, nor were they able to travel around the world with convenient transportation like today."

"So, for mathematicians hundreds of thousands of years ago, most of the reasons they studied mathematics were to kill time."

"So, most of those mathematicians are from wealthy aristocrats, because they have enough time to spend on this kind of thing."

"As for how the research results can help mankind, that is not something they need to consider."

"For this reason, studying number theory and prime numbers has become a very good choice for these nobles."

"Well, having said that, I need to explain to you that in the next learning process, don't ask what help studying number theory or prime numbers can provide to mankind."

"In fact, when studying theoretical mathematics, don't ask how much help studying these things can bring to human research."

"Such a question is meaningless in mathematics."

"Just focus on the theory. As for how much help this mathematical theory can ultimately provide for applications, that is what scholars in the application field need to worry about."

The students present all nodded, especially those in Hua Luogeng's class.

The students who come to Hua Luogeng's class naturally aspire to become pure mathematicians, although there is a high probability that many of them will become "rebels" in the future and choose to pursue the path of applied mathematics. .

However, for now, their ideal is to become a tall pure mathematician.