𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Classification of designs with nontrivial automorphism groups

✍ Scribed by Ziba Eslami


Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
103 KB
Volume
14
Category
Article
ISSN
1063-8539

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

In this article, we introduce a new orderly backtrack algorithm with efficient isomorph rejection for classification of t‐designs. As an application, we classify all simple 2‐(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: 479–489, 2006


πŸ“œ SIMILAR VOLUMES


Classification of 6-(14,7,4) designs wit
✍ G. B. Khosrovshahi; M. Mohammad-Noori; B. Tayfeh-Rezaie πŸ“‚ Article πŸ“… 2002 πŸ› John Wiley and Sons 🌐 English βš– 103 KB

## Abstract In this paper, we introduce some intersection matrices for __t__‐designs. Utilizing these matrices together with a modified version of a backtracking algorithm, we classify all 6‐(14,7,4) and 5‐(13,6,4) designs with nontrivial automorphism groups and obtain 13 and 21 such designs, respe

A Series of Hadamard Designs with Large
✍ Dieter Held; Mario-Osvin PavčeviΔ‡ πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 78 KB

for helmut wielandt on his 90th birthday Whilst studying a certain symmetric 99 49 24 -design acted upon by a Frobenius group of order 21, it became clear that the design would be a member of an infinite series of symmetric 2q 2 + 1 q 2 q 2 -1 /2 -designs for odd prime powers q. In this note, we pre

A classification of all symmetric block
✍ Dean CrnkoviΔ‡; Sanja Rukavina; Marcel Schmidt πŸ“‚ Article πŸ“… 2006 πŸ› John Wiley and Sons 🌐 English βš– 123 KB

## Abstract We complete the classification of all symmetric designs of order nine admitting an automorphism of order six. As a matter of fact, the classification for the parameters (35,17,8), (56,11,2), and (91,10,1) had already been done, and in this paper we present the results for the parameters