Instruct: Classify a review as either positive or negative.
Query: nice book, good for self-learning

I got this book and learned complex variable function from it. I like this book very much. It is well-organized. I read the first partof the book (theory part) carefully, and find it quite clear and approachable. For the application part, I read the Fourier and Laplacechapters and again enjoyed them, but I was confused when reading the last chapter, "asymptotic expansions".A little background in mathematical analysis mightbe helpful, but not necessary. As a person in applied science, I think the rigorousness is enough (maybe not for pure-math people).Overall, it is a good and practical book for self-learning.