Today is September 16th, Tuesday. Qin Ke got up early in the morning and finished practicing Oriental Secret Code with Ning Qingyun. After having breakfast together, he returned to the boys' dormitory and changed into a more formal suit.

It was just early 8 o'clock in the morning. The little fat man Jiang Zhenjie had just jumped out of bed with a yawn. When he saw Qin Ke in formal attire, his eyes widened: "Brother Ke, you are dressed so formally, are you going to get engaged?"

Qin Ke looked in the mirror and straightened his collar briefly, combed his hair casually, and said with a smile: "I don't want to get engaged now. I will just get the marriage certificate in two years. I am going to attend classes at Qiuzhen Academy.

."

Jiang Zhenjie had just woken up and was still a little confused: "Oh, class...Brother Ke, what classes are you going to take at Qiuzhen Academy? Which teacher can guide you in mathematics? Mr. Qiu will guide you personally?"

However, Hua Manting, who had already gotten up and was chatting with his girlfriend Gan Peixuan on WeChat, remembered it and raised his head and said: "Brother Ke is going to teach the students of Qiuzhen Academy, right? Brother Ke and the academic committee are researchers in the Department of Mathematics, but in

Qiuzhen Academy is a specially appointed mathematics professor responsible for algebra, geometry, mathematical analysis and number theory courses. Didn’t the school’s official website publish a notice before?”

Jiang Zhenjie slapped his forehead and laughed: "Look at my memory. I have been seeing Brother Ke every day recently, and I thought we were still in the basic science class together. Then I remembered that Brother Ke and the school committee are already full professors... Hey, I

I decided to talk to my girlfriend about an idea, and she happened to be creating a comic book called "My Professor Roommate Is Sassy and Handsome," which will definitely be very popular."

This joke immediately made dormitory 501 burst into laughter, and even Li Xiangxue, who was reading next to him, smiled.

He stood up and looked at Qin Ke: "Brother Ke, can I also attend your class?"

Qin Ke knew that this little brother admired him, so he patted him on the shoulder and said with a smile: "You can go if you want. Anyway, Qiuzhen Academy does not restrict attendance, but it is best to bring your own stool, otherwise you may not be able to grab a seat."

Li Xiangxue scratched his head, grabbed a coat and put it on, and then actually carried his chair.

Qin Ke couldn't help laughing, grabbed the chair and put it down, grabbed his arm and walked out: "Let's go, my brother has to bring his own stool to attend my class. That's a big joke."

Arriving downstairs in the girls' dormitory, Ning Qingyun, dressed in decent clothes, just came downstairs and came to the door.

A pure white high-lapel top with a big black bow tied on the chest, paired with a pair of loose jeans. It is dignified and delicate without losing youthful vitality. It looks like a professional white-collar worker, but it also has a strong student atmosphere. It is very

Suitable for the youthful and charming Ning Qingyun, whose appearance and figure are almost unchanged from when she was eighteen.

The girl had obviously changed her clothes specially to give lectures, which caused many girls in the girls' dormitory to secretly look at her and study her outfit matching.

Although Ning Qingyun is not an art student, she has a natural sense of beauty. It is not obvious when she usually wears low-key and simple clothes. But as long as she pays attention to her clothes, she will immediately become the target of imitation by girls.

Even the boys who were waiting for their girlfriends downstairs in the girls' dormitory were stunned. When they saw Qin Ke arriving, they quickly looked away or greeted Qin Ke enthusiastically.

Probably only people like Li Xiangxue, who only see problems and scientific research, can remain indifferent.

When Ning Qingyun saw Qin Ke bringing Li Xiangxue out, she greeted Li Xiangxue somewhat unexpectedly. She then stretched out her hand to straighten Qin Ke's clothes, smoothed out some wrinkles with her small hands, and sprayed Qin Ke's newly combed hair.

Apply setting spray and tidy up carefully.

"Okay. This looks a bit like a professor." Ning Qingyun put her hands behind her back, took two steps back, and looked at Qin Ke with satisfaction, looking particularly cute.

If there weren't so many students coming and going around, Qin Ke couldn't help but want to pinch her little face.

The three of them walked together and soon arrived at Qiuzhen Academy. Qiuzhen Academy is actually the "Mathematics and Applied Mathematics Major", but it is relatively independent of the Department of Mathematics and implements the "3 2 3" undergraduate, master and doctoral degree training model.

It only recruits less than 100 people per class. The dean is Mr. Qiu. All matters, including the appointment of teachers, are decided by Mr. Qiu. The goal is to cultivate a group of students who will lead the development of mathematics in the world according to Mr. Qiu’s ideas.

of first-class talents.

Qin Ke and Ning Qingyun each have a 60-minute class on Tuesdays and Fridays every week. Qin Ke is mainly responsible for algebraic geometry and calculus (that is, mathematical analysis), and Ning Qingyun is responsible for number theory.

Regarding the lecture model, Qin Ke and Mr. Qiu also discussed it specifically with Mr. Qiu, and decided to imitate the more advanced international education system, leading students to discuss while giving lectures and asking questions, so as to stimulate students' creative thinking.

In addition, Mr. Qiu also put forward a requirement, that is, to study and communicate in English throughout the teaching process, which is also the main language of daily lectures in the college. Because Mr. Qiu encourages students to communicate more with outstanding mathematics students among their peers at home and abroad, so as to achieve different goals.

There is a collision of cultures and opinions, and we usually pay great attention to the cultivation of students' foreign language abilities.

Qin Ke took the first class first, Ning Qingyun sat down in the teaching assistant position in the front row, and Li Xiangxue found an empty seat to sit down.

This is the largest west terrace classroom in Qiuzhen Academy, which can accommodate about a hundred people. However, considering the teaching effect, students are divided into two groups to attend class, one on Tuesday and one on Friday. Qin Ke has to teach the same content twice.

times, but the advantage is that the number of students is reduced to forty or fifty, making it easier to communicate, ask questions and guide thinking.

When Qin Ke walked to the podium, the students in the audience had quickly quieted down. Everyone cast curious and implicitly admiring glances at their peers standing on the podium, especially when they saw that Qin Ke had nothing in his hands, not even the textbooks.

When I didn't bring it, I couldn't hide my surprise.

Qin Ke stood still in front of the podium, looked around the crowd, smiled and said in English: "Hello everyone, I am Qin Ke. I believe Dean Qiu has told you before, yes, starting from today, I will be responsible for giving you lessons every week.

A big class, the topics are algebraic geometry and calculus."

This is a sophomore student from Qiuzhen Academy. He has basically crammed in English for a year, and it is not a problem to listen to the lectures. There is thunderous applause in the classroom. Everyone has heard of Qin Ke, a mathematical genius. Many people

As soon as he entered school, he went to Room 501 of the boys' dormitory to meet Qin Ke. Of course, more people met Qin Ke at the school's commendation meeting.

Qin Ke pointed at Ning Qingyun again: "This is Ning Qingyun. She also gives you a big class every week. She is responsible for explaining the direction of number theory to everyone."

This time the boys in the audience applauded louder, and there was a hint of enthusiasm.

Not to mention Ning Qingyun's famous name, at least having such a beautiful girl of similar age standing on the stage to give a lecture is particularly eye-catching, right?

Qin Ke pressed his hand gently, and the students quickly became quiet again.

Qin Ke smiled and said: "Thank you for your warm applause. I will not waste your time now and get to the point as soon as possible. After all, when I was in high school, what I was most afraid of was being talked about by the teacher - do you know that you are wasting everyone's lives? Just

Because you wasted one minute in class, the whole class wasted one minute of their lives, which adds up to 53 minutes! Are you worthy of others and the class?"

The students in the audience burst into laughter. Who hasn’t been talked about like this by the teacher in high school? It’s just a memory.

So these playful and familiar words immediately livened up the classroom atmosphere.

"I just said that I am responsible for the three directions of algebra, geometry, and calculus, that is, mathematical analysis. Some people may think, is it okay for you to teach three courses at the same time? And these three courses

Usually we already have teachers to teach us."

The students did have such questions in their minds. When Qin Ke mentioned it, their attention became more focused.

"My answer is, yes! There are no textbooks for my course. I think you all have relevant advanced algebra, geometry, and calculus textbooks. There are also teachers to teach, so I don't need to read books.

Repeated."

Students look at each other and teach without using textbooks? Is this possible? Then how to focus on the exam?

"Are you not used to classes without textbooks? You feel that without textbooks, the lectures will be scattered, unorganized, and difficult to master? Are you afraid that it will be difficult to pass the exam?" Qin Ke patted the podium lightly and replied in a firm voice: "

of course not!"

Qin Ke's eyes were steady and bright: "Some people say that mathematics is a tool, but in my opinion, mathematics is an art! Great art! From different angles and different combinations, you will see different mathematics.

landscape!"

The slight commotion in the audience quickly calmed down, and everyone subconsciously looked at Qin Ke, moved by the momentum brought about by his scolding Fang Qiu.

"Before I show you the art of mathematics, let me ask you a question: why are algebra, geometry, and fractions divided into three different branches of mathematics? Is there any relationship between the three?"

The students in the audience were stunned. The previous question was easy to answer. Algebra is the study of numbers, quantities, relationships, structures, and general solutions to algebraic equations and their properties. Geometry is the study of space structures and properties. Fractions are mathematical analysis.

Advanced calculus, specializing in the study of real and complex numbers and their functions.

There is a big difference between the three, and they are naturally divided into three branches. Together with number theory, they are the four most important branches of mathematics.

As for the connection between them, it’s hard to describe at once.

For example, geometry studies the relationship between figures, while algebra studies the relationship between numbers...

But the students in Qiuzhen Academy are after all the top students in mathematics selected from across the country. After a while, some students still raised their hands and answered: "Simply speaking, with the help of the rectangular coordinate system, geometric graphic relationships can be described through algebra.

And the quantitative relationships between algebras can also be represented graphically."

Qin Ke smiled and nodded: "What's your name?"

The boy perked up and replied: "Professor Qin, my name is Jiang Yunxing."

"Very good, classmate Jiang Yunxing, I will add 5 points to your usual score."

Wow, the students in the audience became excited. It turns out that you can get regular points for answering!

Seeing that everyone's enthusiasm for answering questions was immediately aroused, Qin Ke smiled and said: "Jiang Yunxing just answered the relationship between algebra and geometry, but did not mention fractions. Is there any student who can add to it? Let me explain first.

Now, if you get the answer right, you will get extra points, but if you get the answer wrong, you will get deducted points.”

Everyone's attitude became more cautious.

After a while, a student raised his hand: "Mathematical analysis can be applied to analytic geometry through calculus to help solve geometric problems on spheres and deformed objects."

"Correct answer, plus 5 points."

Qin Ke smiled and said: "Very good. I am very pleased with the students of Qiuzhen Academy. They are active in thinking and good at thinking. This is your advantage! But your thinking can be bolder and more open-minded. Algebra may not be just

Algebra and geometry are not necessarily just geometry. For example, Grothendieck, who was known as the "Emperor of Algebraic Geometry", summarized all the algebraic and geometric structures at that time and achieved a close connection between the two major branches of science. Under Professor Wiles

In the process of proving Fermat's last theorem, we can also see the combination of algebra and geometry. For example, we can see modern abstract algebraic structures and elliptic curve modular structures..."

"These are important milestones in the direction of unifying mathematics."

"About the unification of mathematics, everyone should be familiar with it. The ultimate goal of the international mathematics community now is the unification of mathematics, which is to explain all mathematical problems under a rule framework system. This is like establishing building blocks and the rules of building blocks, and then using the building blocks to

To build everything needed. I think this is a very good prospect, but the future will be difficult and will require the hard work of countless mathematical elites."

"Mathematics is like the story of the Three Kingdoms that we are very familiar with. If we unite for a long time, we will divide, and if we divide for a long time, we will unite."

“The creation of branches is the inevitable result of specialization, and the unification of specialization is too detailed, which also causes the separation between branches, making it impossible to grasp the new pursuit of the overall situation of mathematics... At the beginning, the development of mathematics did not reach a very deep and broad level.

Only in the field can there be Gauss, a super mathematical genius who spans several major disciplines and is proficient in several major disciplines. If we switch to modern subdivisions, which are densely packed with terabytes of literature, even the reincarnation of Gauss will not be able to master them.

Half of them..."

Qin Ke stood on the podium and talked eloquently, from the history of mathematics to the three major branches of mathematics, making boring mathematics interesting.
To be continued...