In the field of postgraduate mathematics, why do you have a bad evaluation of Teacher Zhang Yu?

In the field of postgraduate mathematics, why do you have a bad evaluation of Teacher Zhang Yu? Zhang Yu's class sometimes has gag jokes to help students, but it will leave others with an impression that it is not rigorous and practical enough. I read it directly from the intensive reading class, but even after reading the intensive reading class, his 18 handout is not so easy to understand and thoroughly understand. Generally speaking, whoever can study his 18 lecture from beginning to end and master it to a certain extent will have the actual combat qualification for the advanced part of the postgraduate entrance examination, which requires patience.

Zhang Yu's classes and books are good choices for those who want to rely mainly on autonomous learning, or those who like to study alone, or those who have confidence in their self-learning ability. But remember, once you find that your teaching process is not harmonious with the teacher you choose, you should change to a teacher who suits your style as soon as possible.

For graduate students, a duplicitous teacher is not something you should care about. What you should care about is whether his class can interest you, whether you can continue to learn, and whether he can explain the problems you can't talk about. To put it bluntly, his lecture style should suit you.

I think Zhang Yu has real talent and learning. Of course, among all the famous teachers who took the postgraduate entrance examination, I was most impressed by Teacher Li Yongle. At that time, when I first started to review advanced mathematics, I looked at Zhang Yu, Tang Jiafeng and Yang Chao a little, and finally thought that Zhang Yu was the best for me, so I finally looked at him. It's only winter vacation now, so try more teachers.

No matter which teacher you are, it is more than enough to teach you. Don't worry, I personally like this style. In fact, compared with some graduate students who are active in thinking but don't like to stick to the traditional mathematical style, listening to teacher Zhang Yu's class can really improve their interest ability. In addition, my good thinking agility has really improved mathematics. Of course, doing problems is essential, and doing problems is as essential as the concept of formulas, but the teacher's style can make me learn well.