Quasi-Symmetric Designs

Preface 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 References Index.