TY - JOUR
T1 - Directed covering with block size 5 and index even
AU - Assaf, Ahmed M.
PY - 1998/6/28
Y1 - 1998/6/28
N2 - A directed covering design, DC(v,k,λ), is a (v,k,λ) covering design in which the blocks are regarded as ordered k-tuples and in which each ordered pair of elements occurs in at least λ blocks. Let DE(v,k,λ) denote the minimum number of blocks in a DC(v,k,λ). In this paper the values of the function DE(v,5,λ) are determined for all positive integers v≥5 and λ even.
AB - A directed covering design, DC(v,k,λ), is a (v,k,λ) covering design in which the blocks are regarded as ordered k-tuples and in which each ordered pair of elements occurs in at least λ blocks. Let DE(v,k,λ) denote the minimum number of blocks in a DC(v,k,λ). In this paper the values of the function DE(v,5,λ) are determined for all positive integers v≥5 and λ even.
UR - http://www.scopus.com/inward/record.url?scp=0041783280&partnerID=8YFLogxK
U2 - 10.1016/S0012-365X(97)00272-0
DO - 10.1016/S0012-365X(97)00272-0
M3 - Article
AN - SCOPUS:0041783280
SN - 0012-365X
VL - 188
SP - 27
EP - 40
JO - Discrete Mathematics
JF - Discrete Mathematics
IS - 1-3
ER -