Girish Mahajan (Editor)

Counterexamples in Topology

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Language
  
English

Publication date
  
1970

Pages
  
244 pp.

Author
  
Editor
  
Lynn Steen

4.2/5
AbeBooks

Country
  
United States

Subject
  
Topological spaces

Media type
  
Hardback, Paperback

Originally published
  
1970

Genre
  
Non-fiction

OCLC
  
32311847

Counterexamples in Topology t0gstaticcomimagesqtbnANd9GcSZZ2YKBexyfhNw

Publisher
  
Springer Science+Business Media

Similar
  
Topology books, Non-fiction books

Counterexamples in Topology (1970, 2nd ed. 1978) is a book on mathematics by topologists Lynn Steen and J. Arthur Seebach, Jr.

Contents

In the process of working on problems like the metrization problem, topologists (including Steen and Seebach) have defined a wide variety of topological properties. It is often useful in the study and understanding of abstracts such as topological spaces to determine that one property does not follow from another. One of the easiest ways of doing this is to find a counterexample which exhibits one property but not the other. In Counterexamples in Topology, Steen and Seebach, together with five students in an undergraduate research project at St. Olaf College, Minnesota in the summer of 1967, canvassed the field of topology for such counterexamples and compiled them in an attempt to simplify the literature.

For instance, an example of a first-countable space which is not second-countable is counterexample #3, the discrete topology on an uncountable set. This particular counterexample shows that second-countability does not follow from first-countability.

Several other "Counterexamples in ..." books and papers have followed, with similar motivations.

Reviews

In her review of the first edition, Mary Ellen Rudin wrote:

In other mathematical fields one restricts one's problem by requiring that the space be Hausdorff or paracompact or metric, and usually one doesn't really care which, so long as the restriction is strong enough to avoid this dense forest of counterexamples. A usable map of the forest is a fine thing...

In his submission to Mathematical Reviews C. Wayne Patty wrote:

...the book is extremely useful, and the general topology student will no doubt find it very valuable. In addition it is very well written.

When the second edition appeared in 1978 its review in Advances in Mathematics treated topology as territory to be explored:

Lebesgue once said that every mathematician should be something of a naturalist. This book, the updated journal of a continuing expedition to the never-never land of general topology, should appeal to the latent naturalist in every mathematician.

Notation

Several of the naming conventions in this book differ from more accepted modern conventions, particularly with respect to the separation axioms. The authors use the terms T3, T4, and T5 to refer to regular, normal, and completely normal. They also refer to completely Hausdorff as Urysohn. This was a result of the different historical development of metrization theory and general topology; see History of the separation axioms for more.

References

Counterexamples in Topology Wikipedia


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