Ahmed M. Assaf, Alan Hartman
Discrete Mathematics
A Steiner quadruple system of order v is a set X of cardinality v, and a set Q, of 4-subsets of X, called blocks, with the property that every 3-subset of X is contained in a unique block. A Steiner quadruple system is resolvable if Q can be partitioned into parallel classes (partitions of X). A necessary condition for the existence of a resolvable Steiner quadruple system is that v≡4 or 8 (mod 12). In this paper we show that this condition is also sufficient for all values of v, with 24 possible exceptions. © 1987.
Ahmed M. Assaf, Alan Hartman
Discrete Mathematics
Anton Beloglazov, Dipyaman Banerjee, et al.
Journal of Service Research
Ahmed M. Assaf, Alan Hartman
Discrete Mathematics
Alan Hartman, Mika Katara, et al.
ESEC/FSE 2007