Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6423442 | Discrete Mathematics | 2012 | 11 Pages |
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 vâ¡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.