Xueba starts with change

Chapter 176 I Choose You

After leaving the classroom, Chen Zhou went straight to the library.

Yang Yiyi was still waiting for him in the library.

The algebra discussion class started at 6:9 p.m., and it was only [-] o'clock, so there was still some time before the library closed.

Chen Zhou happened to be going to the library, and reorganized his thoughts.

It has to be said that Yanda’s library is still overcrowded at this time.

Chen Zhou deftly shuttled through the self-study area following the usual route.

Not long after, I saw Yang Yiyi who was reading a book with her head down.

There was an empty seat beside Yang Yiyi, with some books on it.

One was open with a pen in it.

Walking to Yang Yiyi's side, Chen Zhou didn't bother him, but stretched out his head to take a look.

Yang Yiyi was flipping through the relevant literature on her mechanics subject.

What is strange to Chen Zhou is that he has never seen Yang Yiyi take out the experimental data and process it.

Generally speaking, the research methods of mechanics follow the basic rules of epistemology, that is, from practice to theory, and then back to practice.

Unlike the research of pure mathematics, the research of physics is usually based on experiments.

Through the observation of experimental phenomena and the results of quantitative observations, the qualitative relationship between quantities is extracted.

Or, design a scientific experiment for a specific theory, and verify and improve the theory based on the analysis of the experimental results.

Of course, there are also those who do not use ordinary experiments to study physical theories.

That is theoretical physics.

The experimental method commonly used in theoretical physics is an ideal experiment. In layman's terms, it is an experiment in the mind, also known as a thought experiment.

The outstanding master in this respect is Einstein.

Maybe Yang Yiyi's subject is also in the category of theoretical physics?
Chen Zhou, who was thinking like this, didn't intend to ask more questions, he believed in Yang Yiyi's ability and judgment.

Just as Yang Yiyi would not interfere with his subject, before Yang Yiyi asked for his opinion, he would also not take the initiative to interfere with Yang Yiyi's subject.

Taking another look at Yang Yiyi who was concentrating on researching literature, Chen Zhou gently pulled away the chair beside him and sat down.

Just as Chen Zhou was preparing the books on the table, he heard Yang Yiyi's voice: "Sorry, someone is sitting here, he went to the bathroom."

Chen Zhou's hands froze, he glanced at Yang Yiyi, then at the books on the table, and instantly understood.

It turned out that these books were deliberately placed by Yang Yiyi in order to occupy a seat.

Seeing that the people beside her didn't move, Yang Yiyi tilted her head slightly, and just as she was about to say it again, she saw Chen Zhou looking at her with a smile on her face.

Yang Yiyi scolded: "Why didn't you tell me when you came? I thought you were here to grab a seat again."

Chen Zhou explained: "I saw that you were fascinated, so I didn't bother you. Are there many people coming to grab seats?"

Yang Yiyi nodded slightly: "You are the seventh."

Chen Zhou smiled and asked, "Then you just told them that I went to the bathroom?"

"Yeah." Yang Yiyi replied, after a pause, she added, "If someone asks you, I'll tell you that you have diarrhea and probably won't be able to get out of the toilet."

After speaking, Yang Yiyi looked at Chen Zhou with a playful smile.

Chen Zhou shook his head slightly: "I'm afraid I ate ten catties of croton..."

"Cough cough!"

Hearing this voice, Chen Zhou immediately raised a finger and made a silent gesture.

Yang Yiyi understood, turned around, and continued to read her literature.

Chen Zhou glanced at the source of the coughing sound, and couldn't help but feel a little strange, why is it always this person?
Looking away, he took out the draft paper and began to sort out the ideas for this small class.

In fact, Zhang Zhongyuan just led a group of students to appreciate the charm of the Hail conjecture, and did not provide any groundbreaking ideas.

Moreover, the thinking question assigned by Zhang Zhongyuan at the end was just a simple thinking question.

However, this class aroused Chen Zhou's curiosity.

Maybe it would be nice to take the hail conjecture as a new research topic?
It took Chen Zhou 10 minutes to finish the summary.

Looking at the content written on the draft paper, Chen Zhou habitually tapped the draft paper with a pen.

"A simple math game?"

Chen Zhou was thinking, the pen in his hand fell on the draft paper, and began to calculate.

Although formally, the final calculus result of the hail conjecture is 1.

But that's just a more convenient way of saying it.

In fact, whether Chen Zhou or other students tried to substitute numbers in the small class, the final calculations all ended with "4→2→1".

Of course, this is just a conclusion.

If you want to reverse it, it is impossible.

Chen Zhou stopped the pen in his hand and glanced at the draft paper again, his eyes suddenly lit up.

Take out a new scratch paper and start calculating again.

This time, he changed the rules of the game.

Chen Zhou changed the calculus rules of the hail conjecture to give a natural number N randomly, if it is an even number, divide it by 2, and if it is an odd number, multiply it by 3 and then subtract 1.

After some calculations, Chen Zhou discovered an interesting phenomenon.

The calculation results under this rule will appear in three forms of cycles.

The first one is a cycle of "1→2→1".

第二个是“5→14→7→20→10→5”的循环。

第三个是“17→50→25→74→37→110→55→164→82→41→122→61→182→91→272→136→68→34→17”的循环。

That is to say, once the three numbers 1, 5, and 17 are calculated, it will enter a cycle.

"Interesting..." Chen Zhou muttered to himself.

In fact, not only Chen Zhou, many mathematicians have done this example of changing the rules to make the hail conjecture more interesting.

But in the end, it was just an interesting conclusion.

It is far from enough to verify the hail conjecture mathematically.

When Chen Zhou was about to take out the computer from his backpack, the library was about to close.

Chen Zhou put the computer back in resentment. He originally planned to come over, rationalize his thoughts, and finally decide whether he really wanted to study the hail conjecture as a research topic.

As a result, he fell into a math game.

Moreover, the more calculations, the more interesting...

Sure enough, the game is addictive.

Chen Zhou sighed in his heart, but then he also decided to choose you, Hail guessed!

However, Chen Zhou also set limits for himself.

If by this summer vacation, during the military training in Huairou, he has not achieved satisfactory results.

Then he must give up decisively and choose a simpler subject again.

After all, time waits for no one.

Not to mention, next year he still has two graduation thesis for the Department of Mathematics and Department of Physics to complete.

The time limit of the system task alone is there.

It's impossible for him to give up the rewards of the system task for nothing, right?

In case the task expires and he hasn't solved the conjecture of hailstorm, wouldn't it be a waste of time to fetch water from a bamboo basket?

(End of this chapter)