## Abstract In this paper, we introduce some intersection matrices for __t__βdesigns. Utilizing these matrices together with a modified version of a backtracking algorithm, we classify all 6β(14,7,4) and 5β(13,6,4) designs with nontrivial automorphism groups and obtain 13 and 21 such designs, respe
Classification of designs with nontrivial automorphism groups
β Scribed by Ziba Eslami
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 103 KB
- Volume
- 14
- Category
- Article
- ISSN
- 1063-8539
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β¦ Synopsis
Abstract
In this article, we introduce a new orderly backtrack algorithm with efficient isomorph rejection for classification of tβdesigns. As an application, we classify all simple 2β(13,3,2) designs with nontrivial automorphism groups. The total number of such designs amounts to 1,897,386. The decomposability of the designs is also considered. Β© 2005 Wiley Periodicals, Inc. J Combin Designs 14: 479β489, 2006
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