Postgraduates majoring in applied mathematics want to take a cross-disciplinary doctoral examination, and it is relatively easy for the tutor to accept what direction. It's best to give it to some schools. Thanks ~! Mechanics, control, computer can do it. Some of them, especially control and mechanics, are admitted to the Department of Mathematics every year. All my classmates have changed jobs. After graduation, I went to study mechanics and looked at my hobbies. Not difficult. Some teachers want mathematics, but most of them are theoretical, but they have applications.