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This is the first exposition of the theory of quasi-symmetric designs, that is, combinatorial designs with at most two block intersection numbers. The authors aim to bring out the interaction among designs, finite geometries, and strongly regular graphs. The book starts with basic, classical material on designs and strongly regular graphs and continues with a discussion of some important results on quasi-symmetric designs. The later chapters include a combinatorial construction of the Witt designs from the projective plane of order four, recent results dealing with a structural study of designs resulting from Cameron's classification theory on extensions of symmetric designs, and results on the classification problem of quasi-symmetric designs. The final chapter presents connections to coding theory.Read more
- Comprehensive coverage
- Includes discussions of unsolved problems
Reviews & endorsements
"...researchers in design theory should find this monograph to be a valuable resource." A.R. Calderbank, Bulletin of the American Mathematical SocietySee more reviews
"The authors have done a thorough job of surveying the literature up to the time they wrote the book." Sylvia A. Hobart, Mathematical Reviews
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- Date Published: November 1991
- format: Paperback
- isbn: 9780521414074
- length: 244 pages
- dimensions: 230 x 153 x 12 mm
- weight: 0.358kg
- availability: Available
Table of Contents
1. Basic results from designs
2. Strongly regular graphs and partial geometries
3. Basic results on quasi-symmetric designs
4. Some configurations related to strongly regular graphs and quasi-symmetric designs
5. Strongly regular graphs with strongly regular decompositions
6. The Witt designs
7. Extensions of symmetric designs
8. Quasi-symmetric 2-designs
9. Towards a classifications of quasi-symmetric 3-designs
10. Codes and quasi-symmetric designs
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