Chen Zhou returned to his seat and sat down, and found that Yang Yiyi was looking at the textbook intently, and did not realize that he had returned.

Chen Zhou glanced at the time, it was already 3:28 pm.

They spent almost two and a half hours in the library.

Chen Zhou glanced at Yang Yiyi again, then raised his head and took a sip of the spirit medicine, and once again devoted himself to the study of complex variable functions.

This time, no one bothered, and Chen Zhou was eager to study the content of the textbook.

After solving all the questions in Exercise 2 of Chapter 2, Chen Zhou closed the textbook.

Through the use of psychotropic potions during this time, he found himself studying in immersion mode for longer and longer periods.

Even after the strength of the psychotropic pill passed, he was still immersed in the book.

Chen Zhou guessed that it was the addition of psychotropic drugs to active learning habits, and perhaps one day he could break away from psychotropic drugs and achieve that immersion mode by relying only on his own learning habits.

Chen Zhou turned his head to look at Yang Yiyi beside him, this girl was still focusing on the textbook.

He poked Yang Yiyi with his hand, and Yang Yiyi turned her head blankly.

"Are you hungry?" Chen Zhou said softly.

"Huh?" Yang Yiyi didn't react for a while.

Chen Zhou pointed to his watch, and Yang Yiyi noticed that it was almost 6 o'clock.

"Hmm~" Yang Yiyi stretched, then stood up and said, "Let's go." ”

She found that Chen Zhou was not moving, and took a strange look at Chen Zhou, and found that Chen Zhou actually blushed.

Yang Yiyi remembered that she stretched her waist just now, and her whole clothes were tightened on her body, what did this guy see?!

A hint of blush instantly crept up on her face, and she patted Chen Zhou hard: "You... What do you think?!"

Chen Zhou touched his nose a little embarrassed, got up and took Yang Yiyi's hand, and left the library.

On the way to the cafeteria, Yang Yiyi remembered the events of the afternoon and asked, "Chen Zhou, do Professor Wu and Professor Zhang have anything to do with you?"

Chen Zhou replied: "Professor Wu asked me why I was looking at the complex variable function, whether I had finished learning the number of points, and I told the truth. Then, Professor Wu warmly invited me to join their group. Professor Wu praised me for my strong learning ability, and I couldn't refuse, so I had to join them. ”

"Just blow it, I don't believe it. Yang Yiyi said with a smile.

"Hey, hey. Well, actually..."Chen Zhou told Yang Yiyi the actual situation.

After listening to Chen Zhou's words, Yang Yiyi was happy for Chen Zhou, but she still said: "It's also a good thing to be able to join the research project in your freshman year, so you can give the two professors a good hand." ”

"Well, that's what I thought too. Chen Zhou nodded, and said, "It should be a very simple topic, so I will join, but it is a good thing to be able to get exercise." ”

"Hmm. Yang Yiyi agrees with Chen Zhou's idea and Chen Zhou's current mentality.

After Chen Zhou's experience of the psychological distress of chemical biology, his state of mind became more and more stable.

After eating, the two walked hand in hand to the lake of Yanda, with a breeze blowing on their faces, and it was cool in early summer.

Yanda Lake is a famous scenic spot in Yandading.

Chen Zhou looked at Yang Yiyi, and remembered the appearance of this girl stretching her waist, and whispered: "Yiyi, you are so good-looking..."

However, Yang Yiyi didn't hear it, she was looking at the water waves on the lake that were reflected by the lights.

Chen Zhou and Yang Yiyi enjoyed the lake view for a while, then walked towards the library and continued to read books.

It wasn't until the closing time that Chen Zhou and Yang Yiyi came out of the library.

"Yiyi, tomorrow for the 65th National Day, let's go see the military parade, right?" Chen Zhou proposed on the way back to the dormitory.

"Okay. Yang Yiyi readily agreed, thought about it, and asked again, "Uncle and aunt, why didn't they come over to play on the National Day?"

Chen Zhou said: "Originally, there was a big military parade on National Day this year, and I also wanted them to come and have a fun time, and by the way, I would like to see the parade." But I said it several times, and both of them said that they were busy at home and didn't want to come. Well, wait until next time. ”

"That's a pity, the big military parade only comes once in five years. Yang Yiyi said regretfully.

"Then, will your mother come over?" Chen Zhou remembered the woman who smiled at him at Wanxi Station.

Yang Yiyi: "She doesn't have time either. ”

Chen Zhou: "Then let's both of us and shoot more videos." ”

Yang Yiyi said with disgust: "Hey, your photography skills and fireworks are all paste." ”

Chen Zhou: "You are talking nonsense, it is obviously a blurry effect..."

Yang Yiyi: "......"

Chen Zhou sent Yang Yiyi downstairs in the dormitory: "Go to bed early at night and see you tomorrow morning." ”

"Well, you too. Yang Yiyi thought of something again, and added, "Don't stay up late to read." ”

"Okay, got it. Chen Zhou waved his hand and turned around and walked towards his dormitory.

It's impossible not to stay up late, don't you see that Li Li is still working hard to write?

If you don't stay up late, how can you make up for the time you lost playing?

Chen Zhou returned to the dormitory, took out the textbook of complex variable functions from his backpack, and prepared to continue scrolling.

He has already seen the middle of the third chapter, and if he works harder, within three days, it will be all finished, and it is not a problem.

He tilted his head and took a sip of the psychotropic potion.

Chen Zhou opened this yellow-skinned textbook and quickly immersed himself in it.

Although the content of this textbook is not much, it is relatively difficult.

Through this period of self-study, Chen Zhou felt fortunate that the first task after the system was activated, he chose to study high mathematics.

Although Advanced Mathematics is not a textbook for mathematics majors, it is a very comprehensive basic textbook, which can lay a foundation for the study of many mathematics professional textbooks.

This is also one of the reasons why Chen Zhou's self-study is very effective.

“...... Cauchy's inequality, let f(x) be resolved on the region Ω, and on the Ω|f(x)|≤M, then ∀Zo∈Ω,0

Chen Zhou looked at the Cauchy inequality in the textbook while writing on scratch paper about the content and how it was proven.

This is Chen Zhou's habit all along, when reading books, with the pen to memorize, can deepen his understanding of the content of knowledge.

The content of Cauchy's theorem and Cauchy's inequality in Chapter 3 is basically new knowledge, and Chen Zhou will fill the scratch paper after a while.

By the time he finished reading the third chapter, he had already written three full sheets of scratch paper.

These scratch papers are all A4 paper.

Next is Exercise 3, a total of 35 exercises, the last two of which are *.

Chen Zhou mobilized the knowledge he had just gained today, solved these exercises, and increased his knowledge proficiency at the same time.

Chen Zhou completed the previous questions smoothly, only the last question was a little troublesome.

"Let f:D(0,1)→D(0,1) be analytic mappings, and prove that for any smooth γ curve in D(0,1), there are s(f(γ)) ≤s(γ), where s(γ) denotes the non-Euclidean length of the curve γ. ”

Chen Zhou thought for a moment and began to write the proof process on scratch paper: "Proof: Analytical Mapping F......"

By the time Chen Zhou finished writing, the time was exactly 12 o'clock in the night.

Chen Zhou stretched his waist, thinking that Professor Wu would send the information, so he said to Li Li, who was still reading, "LiLi, borrow me the computer?"

"Oh, you open it yourself, the password 123456. Li Li pushed the computer to Chen Zhou.

He watched Chen Zhou open the computer and log in to his mailbox, and then downloaded a compressed package.

Li Li asked strangely, "What did you just got?"

Chen Zhou replied: "The information sent by Professor Wu. ”

Li Li: "Professor Wu, why did he send you information?"

It is the material for the research of the subject. Chen Zhou said as he unzipped the compressed package downloaded from the mailbox, opened the folder, and pointed to the information on it, "Advanced algebra and mathematical analysis are interpenetrating and fusing applied research." ”

Li Li frowned slightly, with a big question mark, and put his head up.