Which is more difficult, Postgraduate Entrance Examination Mathematics 1 or Specialized Course Mathematical Analysis? Now I am faced with the question of whether to change my major (my major is mathematics) Professional mathematical analysis is more difficult, because professional mathematical analysis requires more content and deeper depth than the number 1. For example, there are four mean value theorems in the analysis, three of which are introduced in high numbers. There are too many differences between series part and definite integral part. There are differences among multivariate functions, multivariate calculus and implicit functions.