The last twenty orders of (1, 2)-resolvable Steiner quadruple systems
The last twenty orders of (1, 2)-resolvable Steiner quadruple systems
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DOI:
10.1016/j.disc.2012.08.011
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发表时间:
2012-12
期刊:
影响因子:
--
通讯作者:
Zhaoping Meng;B. Du
中科院分区:
文献类型:
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作者:
Zhaoping Meng;B. Du
A Steiner quadruple system (X,B) is said to be (1,2)-resolvable if its blocks can be partitioned into r parts such that each point of X occurs in exactly two blocks in each part. The necessary condition for the existence of (1,2)-resolvable Steiner quadruple systems RSQS(1,2,v)s is v≡2 or 10 (mod 12). Hartman and Phelps in [A. Hartman, K.T. Phelps, Steiner quadruple systems, in: J.H. Dinitz, D.R. Stinson (Eds.), Contemporary Design Theory, Wiley, New York, 1992, pp. 205–240] posed a question whether the necessary condition for the existence of (1,2)-resolvable Steiner quadruple systems is sufficient. In this paper, we consider the last twenty orders of (1,2)-resolvable Steiner quadruple systems and show that the necessary condition for the existence of (1,2)-resolvable Steiner quadruple systems is also sufficient except for the order 10.