Title: circular logic
Product review: In the beginning chapters of the book, I found circular logic, which casts suspicion on the rest of the book. First, the text proved that exp(A)exp(B) = exp(A+B) because to the trig identities sin(A+B) = sinAcosB+cosAsinB and cos(A+B) = cosAcosB-sinAsinB. Then it proves the trig identities with the fact that exp(A)exp(B)=exp(A+B). Circular logic.While taking the class, I thought the text was okay because it was easy to follow and had good examples. Now I'm am more advanced and use my texts to understand the subtleties of the theory and found this at the very beginning of the text. Are there more errors in logic? If so, is this book really worth using?I gave the book two stars because of its ease of use and examples, but cannot give it more due to the bad logic. If I find any more errors in logic I will change my review to one star.I've heard many people recommend Newman and Bok, so go with that one for an introductory book on complex analysis or Ahlfors for an advanced book.
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