✦ LIBER ✦

On reverse Steiner triple systems

✍ Scribed by Alexander Rosa

Publisher: Elsevier Science
Year: 1972
Tongue: English
Weight: 950 KB
Volume: 2
Category: Article
ISSN: 0012-365X
DOI: 10.1016/0012-365x(72)90061-1

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✦ Synopsis

1 he existence of reverse Steiner triple systems It.e. Steiner triple systems with a given involutory automorphism of speck4 type) is investigated. it is srfrwrn that such a system exists far alI wders n if n z t of 3 or 9 (mod 24: except posd&ly far n = 25. A system with this grspetty exists also for n = I9 md possibly for every n = 19 (mod 24). On the o:her hand, it is demonstmtcd that wch systems do not exist far the other values of II.

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