The three of them chatted about high school life for a while, and Yang Fan saw that the two of them still missed high school life.

"It's not nostalgia, Yang Fan, let me tell you, my brother is bitter. ”

It was fine just now, but Pan Zhe's painting style suddenly changed, his stomach was full of sourness, and he was depressed and unspeakable.

Su Junan nodded sympathetically and said, "When I was in high school, I was a top student, and I was secretly crushed. In college, it's not a fart, it mainly depends on looks and gold. ”

Speaking of appearance, Su Junan is five big and three thick, and he really doesn't look like a student of Mizuki. Pan Zhelu is seriously humanized, and he has also passed away, not as exaggerated as he imagined.

"9 to 1, why didn't I get closer, I chose Zhedong, I was harmed by the so-called TOP2. Pan Zhe slapped the table in the cafeteria, venting his dissatisfaction, and almost rolled over.

TOP2 is the top two in China, there is a joke to describe the pattern of domestic universities, only the first, not the second. There is only the third, there is no fourth.

Su Junan explained: "The ratio of female students in the mathematics department of our school is 9 to 1, in fact, many of the 211,985 are basically 1 to 1, and it is very convenient to switch to finance and economics at that time." Because the top science subjects in high school are often men, it's really funny. ”

Yang Fan understands that the training camp a few days ago was full of men, and the finalists were also men, and the female students were purely playing soy sauce.

"Yang Fan, you have to get off the list quickly. Entering the Shuimu Mathematics Department is entering the monk's nest. We can't compete with those second generations, they will come to things, have resources, and have seen all kinds of scenes. Ay. ”

Pan Zhe said what a man wanted, compared to chasing girls, he is definitely not those second-generation opponents.

The second generation was still relatively cool when he was a student, because of the abundance of resources, the way he received education, his vision, his dress, etc., which was a little higher than the sling.

Yang Fan secretly compared with his classmate Liang Yi, the rich second generation, if it weren't for the aura of a little scholar, the comprehensive score would really not be as good as him.

That guy's winter clothes are simply human-shaped RMB, with a base of tens of thousands, and Yang Fan, except for the down jacket, which costs a few hundred, the others are all famous brands of a certain treasure.

"Remember the little junior brother, you only need to do two things in college, sister paper and sister paper, as for professional classes, pull down the old face and stuff some cigarettes at the end of the term. In fact, the difficulty of the make-up exam will be reduced. ”

Pan Zhe looked like a person who had come over, and pointed out Yang Fan's future life path, "Okay, I'm done eating, the first section, Gao Dai, have you brought the book?" ”

There are also several freshman courses in mathematics, including advanced algebra, numeracy, and analytic geometry, and Yang Fan decided to participate in university physics and physics experiments at that time.

He patted it inside the black satchel and said, "It's all ready." ”

When I arrived at university, there was no such thing as a schoolbag, and girls would have a small bag at any time, and the contents of the bag were famous. Boys can go to class with a pen and a book.

The three of them walked together and came to a red-and-yellow ancient building and ran to the third floor. Pushing open the door of classroom 312, there were thirty students present, and immediately looked towards the door.

The counselor, Lao Cui, took care of the students in the group of students, and there was an auditor today. I was more than halfway through my freshman year, and suddenly one appeared, and the whole math application class was naturally very curious.

"The rich second generation is definitely making money. And the door is open. ”

"Lao Cui's old family, go to the door. ”

The discussion in the student group was boiling, and they asked Pan Zhe and Su Junan, who lived in the same dormitory, but they couldn't say clearly.

Yang Fan followed behind the two of them, and when he saw that everyone was incarnated as Sherlock Holmes, he simply walked to the podium generously, and said: "Big brothers and sisters, the younger brother entered Shuimu in September and came to the pilgrimage first, please take care of it." ”

"I thought it was the second generation, and I wanted to rub cigarettes in the future. ”

"It's Lao Cui's relative, you have to give some face to prevent a small report. ”

"It's the way of the dean of the Academy of Mathematical Sciences, don't be confused. ”

Yang Fan smiled slightly, nodded and went down, went to the corner seat on the back of the class, and sat down quietly.

"Sure enough, it's 9 to 1, no wonder the two roommates are full of complaints. ”

He glanced at it and came up with the data, a total of 32 students, three female students.

After the students in the class discussed a few words, they didn't pay attention anymore, but remembered that there was such an auditor.

Five minutes later, the professor stepped into the professor with a sparse head and frowned slightly when he saw the separate seat in the class.

Small-class professional classes are not allowed to be audited, and some classes have a fixed number of seats, so don't think about skipping classes.

Then he remembered the dean's care yesterday, suppressed the displeasure, and went to the podium with an expressionless face.

"Ladies and gentlemen, recently we are talking about vector space, today we will talk about the second section, linear correlation of vectors, please turn to page 153 of the book......"

In the audience, there was a sound of flipping books, and the students' spirit was condensed and single-minded.

Yang Fan took out the new book with a fresh fragrance, turned to the page, and listened intently to the professor's explanation.

"A set of elements in a vector space that has no vector that can be represented by a linear combination of a finite number of other vectors is called linearly independent or linearly independent, and vice versa is called linearly correlative. ”

"For any group of vectors, either linearly independent or linearly correlated. ”

Vectors A1, A2, ··· , an(n≧2) is a linear combination of the rest (n-1) vectors. ”

......

Yang Fan felt very flavorful when he listened, Gao Dai is actually an extension of the line generation, and Feng Yao read the book of the line generation to him in advance, and it is also the knowledge of the matrix, and the proficiency is already 61%.

Following the explanation, the thoughts echoed in his mind, and suddenly the system voice sounded: "Ding Dong, "Linear Algebra and Applications", receive 1 to 10 bits of information per second, and increase 1% of proficiency." ”

Yang Fan's mouth was in the shape of O, and the surprise came too suddenly. Listening to lectures can speed up proficiency?

Wait, why didn't you find out before? He remembered that after getting the system in high school, he focused on reading books, and the teacher's lectures were basically rarely listened to.

Yang Fan leans towards the latter, some things must be taught by others, and it must be more difficult to comprehend them on their own.

"Primary and secondary schools rely on self-consciousness, and preview and review account for a large proportion. After college, it is taught by teaching, no wonder it is said that it is another magnitude of difficulty. ”

The efficiency is countless times higher than that of him brushing through books and dozens of books in sections, in order to speed up, he considered the problem of skipping classes in the future.

After making up his mind, he stopped paying attention to the progress and immersed himself in the ocean of knowledge.

"A sufficient condition for a linear correlation of a vector is that it is a zero vector. ”

For example, in three-dimensional Euclidean space, the three vectors of R (1, 0, 0), (0, 1, 0) and (0, 0, 1) are linearly independent. But (2, 1, 1), (1, 0, 1) and (3, 1, 2) are linearly related, because the third is the sum of the first two. ”

......

In the two math classes, Yang Fan's linear algebra application progress increased by 2%, and advanced algebra proficiency increased by 1%.

The two are similar and intersecting, and there are many repetitions, and they are actually settled into two books by the system.

"These are just the basics, and in the future, after the mathematics branch is delicate, there will only be one subject. ”

found a new way to cheat, and Yang Fan was in a very good mood. Within 10 years, you will reach the top and win awards.