Categorical Structure of Closure Operators
With Applications to Topology, Algebra and Discrete Mathematics
Series: Mathematics and Its Applications; 346;
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Product details:
- Edition number 1995
- Publisher Springer Netherlands
- Date of Publication 31 October 1995
- Number of Volumes 1 pieces, Book
- ISBN 9780792337720
- Binding Hardback
- No. of pages358 pages
- Size 234x156 mm
- Weight 1570 g
- Language English
- Illustrations XVIII, 358 p. Illustrations, black & white 0
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Long description:
Our motivation for gathering the material for this book over aperiod of seven years has been to unify and simplify ideas wh ich appeared in a sizable number of re search articles during the past two decades. More specifically, it has been our aim to provide the categorical foundations for extensive work that was published on the epimorphism- and cowellpoweredness problem, predominantly for categories of topological spaces. In doing so we found the categorical not ion of closure operators interesting enough to be studied for its own sake, as it unifies and describes other significant mathematical notions and since it leads to a never-ending stream of ex amples and applications in all areas of mathematics. These are somewhat arbitrarily restricted to topology, algebra and (a small part of) discrete mathematics in this book, although other areas, such as functional analysis, would provide an equally rich and interesting supply of examples. We also had to restrict the themes in our theoretical exposition. In spite of the fact that closure operators generalize the uni versal closure operations of abelian category theory and of topos- and sheaf theory, we chose to mention these aspects only en passant, in favour of the presentation of new results more closely related to our original intentions. We also needed to refrain from studying topological concepts, such as compactness, in the setting of an arbitrary closure-equipped category, although this topic appears prominently in the published literature involving closure operators.
MoreTable of Contents:
1. Preliminaries on Subobjects, Images, and Inverse Images.- 2. Basic Properties of Closure Operators.- 3. Examples of Closure Operators.- 4. Operations on Closure Operators.- 5. Closure Operators, Functors, Factorization Systems.- 6. Regular Closure Operators.- 7. Subcategories Defined by Closure Operators.- 8. Epimorphisms and Cowellpoweredness.- 9. Dense Maps and Pullback Stability.- Index of Definitions.- Notation Index.- Tables of Results.
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