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Review title: Weak and Fragmented Approach
Product review: I'm sorry, but I've read much better books on this subject. I wonder why the author wrote it and I wonder if any academic institution used it. The book assumes a lot on the part of the reader and many proofs with many paved steps missing. The book doesn't lack rigour. Other books, by Robert G. Bartle and Michael Spivak, leave this book in the shadow.
