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15 of 15 people found the following review helpful:
4.0 out of 5 stars
Excellent reference, poor textbook, July 8, 2000
By A Customer
This review is from: Algebraic Topology (Paperback)
This book is terrific as a reference for those who already know the subject, but if you teach algebraic topology it would be dangerous to use it as a graduate text (unless you're willing to supplement it extensively). The basic problem is that Spanier does not teach students how to compute effectively because his abstract, high-powered algebraic approach obscures the underlying geometry, which is not developed at all. Here I'd recommend the books by Munkres, or Greenberg; even the old-fashioned treatment of Lefschetz, with its explicit and rather cumbersome treatment of cohomology, could serve as an antidote to Spanier. Somewhere, the student has to acquire a good intuitive feeling for the geometry underlying the subject (the same can be said of algebraic geometry -- here earlier work (e.g., of the Italian school, Weil's old book on intersection theory, ...) should not be neglected entirely in favor of Grothendieck et al., for something essential is lost) That said, if you already know the subject Spanier's book is an excellent reference. Even here, though, you'll need to provide some details toward the ends of the later chapters. Each chapter starts out relatively easily and works up to a crescendo, the treatment becoming terser and more advanced. I give it four stars (5 for mathematical quality, 3 for usefulness as a text). The first three chapters deal with covering spaces and fibrations; the middle three with (co)homology and duality; the last three with general homotopy theory, obstruction theory, and spectral sequences. Some of Serre's classical results on finiteness theorems for homotopy groups are presented.
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9 of 9 people found the following review helpful:
4.0 out of 5 stars
Pioneering text, June 9, 2007
This review is from: Algebraic Topology (Paperback)
This book was an incredible step forward when it was written (1962-1963). Lefschetz's Algebraic Topology (Colloquium Pbns. Series, Vol 27) was the main text at the time. A large number of other good to great books on the subject have appeared since then, so a review for current readers needs to address two separate issues: its suitability as a textbook and its mathematical content. I took the course from Mr. Spanier at Berkeley a decade after the text was written. He was a fantastic teacher - one of the two best I've ever had (the other taught nonlinear circuit theory). We did NOT use this text, except as a reference and problem source. He had pretty much abandonded the extreme abstract categorical approach by then. The notes I have follow the topical pattern of the book, but are so modified as to be essentially a different book, especially after covering spaces and the first homotopy group. His statement was that his treatment had changed since the subject had changed significantly. So much more has changed since then that I would not recommend this book as a primary text these days. Bredon's Topology and Geometry (Graduate Texts in Mathematics) is much better suited to today's student. So, why did I give it four stars? First, notice that it splits stylewise into three segments, corresponding the treatment of its material in a three quarter academic year. The first three chapters (intro, covering spaces, polyhedral) have really not been superceded in a beginning text. Topics are covered very thoroughly, aiding the student new to the subject. The next three chapters (homology) are written much with much less explanation included - indeed, some areas leave much to the reader to discover and, consequently, aren't very helpful if the instructor doesn't fill in the details (the text expects a rather rapid mathematical maturation from the first part - too much of a ramp in my opinion), but the text is comprehensive. The last section (homotopy theory, obstruction theory and spectral sequences) should just be treated as a reference - it'd be hard to find all this material in such a compact form elsewhere and the obstruction theory section has fantastic coverage of what was known as of the writing of this book. It's way too terse for a novice to learn from and there are some great books out there these days on the material.
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7 of 9 people found the following review helpful:
4.0 out of 5 stars
Thorough treatment of algebraic topology, October 22, 1998
This review is from: Algebraic Topology (Paperback)
Spanier's book is a wonderful treatment of many important ideas in algebraic topology, from covering spaces to Cech Cohomology. However, the going is difficult for those not initiated into the basic ideas. The proofs are correct, but often too terse for graduate students. It would also be nice if there were more explicit examples in the text, as in Greenberg and Harper's book, for example. There are plentiful exercises that go deep into the theoretical aspects of the subject. I use this book as a reference for my research and for that purpose it is excellent!
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