Xueba starts with change

Chapter 553 Tell You About Number Theory

02:30 in the afternoon.

When he arrived at the place, the first thing Chen Zhou saw was the crowded outside of the auditorium.

This made him have to say "Students, how are you, thank you very much for your enthusiasm, and please let me in, otherwise, no one will give you a class."

While dodging and moving, they squeezed into the lecture theater.

It cannot be said that this scene has never happened in the century-old history of Yanda University.

But in recent years, there really is no professor whose first trial class can achieve such a sensational effect.

This sensational effect is not limited to the almost watertight lecture hall in front of me.

Outside, outside the Yanda campus, there are quite a few pairs of eyes staring at this area.

Among other things, Chen Zhou also received a message from the president of Hudan University, that is, Mr. Yu, this morning.

I wish him success in his trial.

Of course, there is another sentence behind.

That is, has Chen Zhou considered the honorary professor of Hudan University?

With Chen Zhou's appearance, the atmosphere at the scene suddenly became higher.

Everyone turned their heads to look in the direction of the voice.

The crowd in front of Chen Zhou also followed Chen Zhou's voice and gave him a way tacitly.

Chen Zhou, who no longer had to move around, also quietly breathed a sigh of relief.

He was really afraid of these people. After seeing him, not only did he not give way to him, but he surrounded him first.

Walking into the lecture theater, Chen Zhou really felt how many observers came to his trial number theory class at Yanda University.

Looking around, there are crowds of people.

Each face also covers all age groups from young to old.

"Students, teachers, good afternoon everyone..."

Chen Zhou, who stepped onto the podium, officially started his first trial class at Yanda University.

At the same time as Chen Zhou's voice sounded, the inside and outside of the lecture theater fell silent instantly.

Everyone seems to be observing the discipline that has always stood above the classroom since ancient times.

This is the most basic respect students have for teachers.

Chen Zhou was very satisfied with everyone's reaction and performance.

He turned slightly, connected the projector on the podium, and prepared to give a lecture.

"Although this class is a trial class, it follows Professor Zhao's number theory class, so let's turn to the textbook first..."

Hearing Chen Zhou's words, everyone in the audience couldn't help showing a hint of doubt.

Although Chen Zhou's trial class was originally Professor Zhao's number theory class.

But now, after all, is it your professor Chen's trial class?

How can you let us turn to the textbook?

Don't you see, this leaky lecture theater?
Don't you see, these eager professors and students?

Didn't we come here for you to continue teaching Professor Zhao's number theory class? !
There is one more thing they don't really want to understand.

That is, why did Chen Zhou choose a class taught by a professor as his first trial class?
It stands to reason that for a boss like Chen Zhou, Yanda should arrange a trial class like a lecture for him.

Ignoring the reactions of everyone in the audience, Chen Zhou flipped through the textbook in his hand.

The textbook in front of him, as well as the notes Chen Zhou made during his self-study.

But, haven't touched it for a while.

That's right, the textbook in Chen Zhou's hand was the one he used when he was studying at Yanda University.

It is different from selling books as soon as I graduated from high school before repeating my studies.

After graduating from Yan University, Chen Zhou kept these textbooks and materials well.

And when Chen Zhou went to MIT, these textbooks were left at Yanda.

As for the custodian, it is Zhang Zhongyuan.

Chen Zhou still remembered that when he was planning to deal with these textbooks, Zhang Zhongyuan himself took the initiative to find them and keep them for him.

It's a pity that Zhang Zhongyuan originally thought that these highly collectible textbooks and materials should belong to him.

Unexpectedly, Chen Zhou took all these things away from Yan University this time.

Not even a piece of draft paper was left for him.

Zhang Zhongyuan's mood at that time was as if he had lost a hundred million...

Soon, Chen Zhou turned the textbook to the page taught by Professor Zhao.

Looking at the mark he made on it last night, Chen Zhou smiled slightly.

After confirming that the first trial class would occupy Professor Zhao's class, Chen Zhou took the initiative to communicate with Professor Zhao once.

About the progress of the course, about the depth of the course, and about the content that needs to be pushed in this class.

Chen Zhou confirmed everything with Professor Zhao.

In this regard, Professor Zhao was actually very surprised.

He couldn't figure out why Chen Zhou continued to teach his class.

In fact, what Professor Zhao didn't know was what everyone present was wondering about.

For the first trial class this time, the reason why I didn't choose lectures was to take up Professor Zhao's class.

It's all Chen Zhou's own decision!
When Chen Zhou told Dean Sun about this idea, Dean Sun also looked puzzled.

But Dean Sun didn't ask any more questions. He thought that since Chen Zhou had his own ideas, Yan University, or several colleges, just needed to support them. Why did they ask so many questions?
In fact, Chen Zhou's idea is actually quite simple.

Since he chose to return to Yanda to teach, he really hoped to be a teacher.

Bring something different to Yan University, and even Huaguo.

It is impossible to have any intuitive feeling for the lecture as a trial class.

Only by occupying the courses taught in the original class and conducting trial lessons like this can we really understand things.

Of course, when Chen Zhou communicated with Professor Zhao, he didn't really want to help him with a class.

If that's the case, there's not much point in this trial lesson.

But now, when Chen Zhou saw so many people in Professor Tiered, he quietly had some more thoughts.

Chen Zhou naturally knew what the professors and students inside and outside Professor Tier's place came for.

Since everyone was looking forward to it, he certainly couldn't disappoint those present.

But, don't rush right now...

With the passage of time, the textbook in Chen Zhou's hand was flipped rapidly by him.

This is the basic content of this lesson, and Chen Zhou intends to solve it quickly.

On the blackboard on the podium, Chen Zhou also wrote down not many, but definitely a lot of calculations.

Different from other professors' teaching methods, Chen Zhou chose some very typical number theory examples that he had reserved as a supplement to the textbook content.

What's interesting is that I don't know whether Chen Zhou's explanation is too exciting, or these professors and students are giving Chen Zhou face.

The number theory examples written by Chen Zhou on the blackboard won unanimous praise from everyone.

As for the direct expression of praise, it is the busy pen in everyone's hands.

What Chen Zhou didn't know was that when he started to explain the number theory examples that were not in these textbooks.

The expressions of all the people present began to become attentive.

What was recorded in the notebook was not only the example problems of number theory on the blackboard, but also Chen Zhou's problem-solving ideas and mathematical language.

This is also what everyone present hopes to see and gain from Chen Zhou's class.

At first, when they heard Chen Zhou's words, they thought that Chen Zhou was going to follow the scriptures.

In the end, I didn't expect that Chen Zhou's lecture efficiency was simply not too high.

In a few words, it didn't take much time to finish the class.

Then there are these very interesting number theory examples.

Therefore, the emotions of everyone in the audience at the moment are extremely excited.

From the bottom of my heart, I also directly gave a five-star praise to Chen Zhou's trial class, which had just started for a short time.

The only thing that still confuses them now is the projector that Chen Zhou built up from the beginning.

Why hasn't a single slide been let go until now?
If Chen Zhou knew what they were thinking, he would probably say dumbfounded: "Because I haven't finished the textbook content of this lesson..."

Following another classic number theory example, it was written by Chen Zhou.

Chen Zhou finally raised his hand and looked at his watch.

This time was just right, within his calculations.

Chen Zhou turned around gently, and slowly put down the chalk in his hand.

He raised his head and looked at the auditorium, which seemed to be gathering more and more people.

"The above is basically the content of our class. I didn't speak fast, and I believe everyone can understand..."

Speaking of this, Chen Zhou paused, and added with a smile: "In this case, I can be regarded as worthy of the class that Professor Zhao gave me, and I didn't mislead his students..."

Hearing Chen Zhou's words, everyone in the audience smiled kindly.

For this kind of teaching, everyone just wants to say welcome.

As for Professor Zhao himself, he looked at the content recorded in the notebook, and just wanted to say, from now on, he can give Chen Zhou all the lessons!
In addition, everyone in the audience inevitably became curious.

The time for this trial class is only halfway through. If the content of this class has already been covered, what else is there?
Thinking of this, everyone's hearts can't help but become hot.

What they expected has also become more.

"Let's get down to business, we still have a lot of time for this class. Next, I want to talk to you about the subject of number theory, and I also want to share with you some of my experience in doing number theory conjecture research."

When Chen Zhou's voice sounded, he immediately drew everyone's attention.

Chen Zhou's answer was exactly what everyone was looking forward to.

Chen Zhou glanced at the young or old "students" in the audience, and said, "'Number Theory' is actually a word that is not too far away..."

"It was called 'arithmetic' in the early days of its establishment, that is, the 'integer' and 'arithmetic' that we started to learn in the first grade of elementary school. It was not officially renamed as 'number theory' until the early 20th century."

"So, all of us here have actually started to get in touch with number theory a long time ago. This also shows that the most basic content in number theory actually has a very low threshold."

"But it is precisely this number theory, which seems to be only the threshold of the first grade of primary school, is actually facing many difficult topics, so that in the history of mankind, there have also been phenomena like 'sudden interruption'..."

At this point, Chen Zhou started to show his PPT.

The beginning of the slide is the history of number theory.

Counting the history known as "arithmetic", the development of number theory actually has a history of more than 2400 years.

However, in the history of more than 2400 years, there is indeed a phenomenon of "sudden interruption" in Chen Zhou's mouth.

On the slide is the formula "there are infinitely many prime numbers" proved by the ancient Greek mathematician Euclid in 300 BC.

This is the beginning of number theory.

Afterwards, Chen Zhou flipped through the slides while narrating.

On the second slide, 250 BC, the content of the "Sieve of Eratosthenes."

This is the origin of the famous sieve method in the field of number theory.

And then, on the third slide, there's nothing.

That's right, there is indeed nothing, just blank.

Because after the "Sieve of Eratosthenes", for nearly 2000 years, the research results of number theory were almost blank.

It was not until the 15th and 16th centuries and until the 19th century that the study of number theory rose again.

The emergence of Fermat, Mason, Euler, Gauss, Riemann, Hilbert and other mathematicians quickly promoted the development of number theory.

This is what goes on the next slide after the blank slide.

When it came to this slide, there was a moment of silence.

Everyone was guessing Chen Zhou's intentions.

They were all guessing what Chen Zhou wanted to tell them through that blank slide.

But Chen Zhou didn't bother to explain the blank slide.

He believes that through what he said just now, everyone has gained something of their own.

He doesn't need, and doesn't need, to impose his own interpretation on anyone.

On the contrary, the content after this "sudden interruption" is the more exciting number theory.

It is also the last content of his trial class today.

"In the beginning, the main line of number theory research was to find the 'general term formula' of prime numbers. During this process, mathematicians completed the transformation from 'elementary number theory' to 'analytic number theory' and 'algebraic number theory', and thus, the There are more and more conjectures that cannot be solved..."

"And all of this began in 1801, when Gauss completed the masterpiece "Studies on Arithmetic" based on the research results of his predecessors. It was "Studies on Arithmetic" that opened a new era of "modern number theory"..."

Chen Zhou tapped his finger, and the slideshow kept switching.

Gauss's "A Study of Arithmetic" also appeared on the projection screen.

Next to it are the well-known "congruence theory" and the "law of quadratic reciprocity" known as "the yeast of number theory".

It is on this basis that Riemann created the "Riemann zeta function".

Therefore, there is the "Riemann Hypothesis" that has fascinated countless mathematicians.

Speaking of Riemann, after studying the "Riemann ζ function", he found that the "analytic properties" of the "complex variable function" seemed to reveal the "prime number distribution law".

In this way, because of this discovery, Riemann pushed the research field of number theory into the "field of analysis".

At this time, the field of number theory was on the road of rapid development.

With the continuous emergence of new mathematical tools, number theory began to establish a connection with "algebraic geometry".

This led directly to the birth of "arithmetic algebraic geometry".

The birth of "Arithmetic Algebraic Geometry" also allowed mathematicians to start a new journey of number theory research from a new perspective and height.

On the projection screen, the content of "Riemann zeta function", "Riemann conjecture", "arithmetic algebraic geometry" and so on flashed in turn.

Chen Zhou also described his understanding of these contents from his own unique perspective.

The history of number theory research is actually not just a history.

It is the most important treasure house for studying number theory.

This is also one of the reasons why Chen Zhou put these contents in the first trial class.

The slideshow switches again.

This time, the content above caught the eyes of many professors.

Because this thing is one of the important directions for the development of "Future Mathematics".

These professors are looking forward to what kind of opinions Chen Zhou will express on this content.

At least, as far as the previous situation is concerned.

The content of Chen Zhou's trial class was really unexpected.

This is not only reflected in the rich content of the trial class.

More importantly, Chen Zhou's narration and Chen Zhou's understanding.

The current language of the only bigwig in the field of number theory.

It's just so fascinating!

It's also so intoxicating and satisfying expectations!

They have continuously raised their expectations!

And they want more...

　PS: There are many unsatisfactory things, and if they are not handled well, it will be even more unsatisfactory.Yibai has been dealing with things during this period of time, so I stopped updating for a while, sorry.I don't know what to say, anyway, it's just resuming the update...

　　PS: Thank you book friend cwjxqb for the 1500 starting point coins!
　　Thanks to book friend Yan Hongxue for the 100 starting coins!
　　Thanks to the book friends, goodbye is a better reunion for rewarding 1500 starting coins!
　　Thank you book friend Ning Ningzi for the 500 starting coins!
　　Thanks to book friend Yiye Xiaotian for the reward of 1500 starting coins!
　　
　
(End of this chapter)