noon.

Chen Zhou and Yang Yiyi returned to Yanda and settled lunch in the cafeteria.

Then, he returned to the dormitory.

Chen Zhou looked at the time and it was past 12:30.

The exam starts at 2:30 pm, but like the team competition, the exam for each subject in the individual competition is also required to enter the venue half an hour in advance.

In such a short time, Chen Zhou no longer wants to do anything else.

I simply lay on the bed and prepared to take a nap to raise my spirits for the afternoon and evening exams.

He didn't have to worry that Zhao Qiqi and the others would wake him up when they came back.

Because he had called the three of them, and they all handed in the papers they had only handed in at 12 o'clock.

It was already 12:15 when they walked out of the math center.

They didn't plan to go back to school, so they looked for a hotel nearby to solve the problem.

Until the alarm clock rang, Chen Zhou opened his eyes and turned over and got out of bed.

I looked at the time and slept for about half an hour.

Just right.

It is enough to take a nap for half an hour, and it is not good to sleep more or less.

After going to wash his face, Chen Zhou called Yang Yiyi.

The two met and went to the Mathematics Center.

At 2:30 pm, Qiu Sai continued.

The first goal of the individual competition is analysis and partial differential equations.

Chen Zhou roughly browsed the entire test paper.

The test point of the first question is the related questions of measurable functions.

Measurable functions refer to definitions?t∈r,e[f>t] is a measurable set, and then function f is a measurable function.

Therefore, combined with the question information fn∈l2(r) is a sequence of measurable functions, and fn→f is continuous everywhere.

Chen Zhou can basically determine the solution to this problem.

Then use the assumption conditions given last above, ║fn║l2→║f║l2.

Chen Zhou quickly wrote his answer on the test paper.

After writing, I looked it out.

After confirming that there were no detailed errors, Chen Zhou began the next question.

The second question is the problem of continuous functions and definite integrals.

It didn't take much trouble, Chen Zhou got it done.

The difficulty of this question is similar to the first question.

Then there is the third question.

Seeing this question, Chen Zhou raised his eyebrows.

Something interesting.

The question information of this question is an inequality.

【|f(z)|≤|z|2|im(z)|2】

Then the maximum "z" value is required so that the inequality meets the condition.

Often, the less information about this kind of question, the easier it is to lose clues.

But Chen Zhou didn't know how to do it. After thinking for a while, he understood the meaning of this question.

Then, I started writing.

Change the ideas in your mind to the steps of disintegration.

Write it out one by one formula, one by one step.

The fourth question is the problem of pure functions.

When Chen Zhou first browsed, he thought it was a coincidence.

He just completed a paper related to fully pure functions.

This encounters the problem of pure functions.

Give points questions.

Question 5.

Questions about Hilbert Space.

This is also a question that Chen Zhou is interested in.

The reason for interest is mainly Hilbert Space.

Although this question is simple after all, it also provides Chen Zhou with some ideas.

For the next step, his research direction.

After finishing this question, Chen Zhou completed the task of this exam in order.

Looking back, from question 5 to question 1.

Chen Zhou checked it again.

After all, what he told Yang Yiyi and the others also applies to himself.

People often ignore obvious mistakes.

After carefully checking the problem-solving steps and details of the five questions, Chen Zhou had to get up and hand in the paper.

What surprised him was that Professor Shang, who met in the morning, was standing next to him again this time.

Seeing that he was going to hand in the paper, Professor Shang stretched out his hand directly.

Chen Zhou handed the test paper to Professor Shang and smiled at him.

After Chen Zhou walked out of Professor 1308, he saw Yang Yiyi coming out not long after.

Chen Zhou looked at the time and a smile appeared on the corner of his mouth: "Analysis and partial differential equations are worthy of what this girl is good at..."

I visited the Morningside Mathematics Center of the Chinese Academy of Sciences with Yang Yiyi for a while. When the exam was over, Zhao Qiqi and the other two came out.

Chen Zhou and the other two found a restaurant together.

After dinner, because Yang Yiyi did not have the probability and statistics exam, she went back to Yan University first.

Chen Zhou and the other four were left, and they returned to the Mathematics Center and waited silently for the exam.

It was very tacit. Zhao Qiqi and the other two never mentioned the exam in front of Chen Zhou.

Even if they made all the test papers, they wouldn't say a word.

After all, the past is vivid in my mind...

Wait until 6:30 pm.

The second subject of the individual competition, probability and statistics, start the exam.

How to say it, Chen Zhou felt that the examiner of this subject must not be serious.

Whether it is an individual competition or a team competition, the test papers for this subject are very simple.

For example, the topic of tossing a coin can appear here.

The title means:

[Throw an even coin until the side of the coin with flowers appears twice in a row. How many times does the coin flip?]

Chen Zhou can think of many solutions to this problem.

The most common one is the probability formula.

Secondly, there is a method of recursively making equations for forking trees.

In general, the difficulty of probability and statistics of this test paper are not even as difficult as the final exam of the probability theory course that Chen Zhou took last year.

Of course, Chen Zhou could also guess the reason for this situation.

After all, this is just a preliminary round, and the people you face are college students from all regions of China.

After the probability and statistics exam, Chen Zhou waited outside for a short time before seeing Li Li handing out the papers.

Then it was Zhu Mingli, and finally Zhao Qiqi.

Chen Zhou asked with a smile: "Don't wait until the end?"

Zhao Qiqi also smiled and replied, "Aren't you afraid that Brother Chen, you will wait too long?"
To be continued...