ARSCOM
2004
13 years 4 months ago
2004
The existence question for the family of 4-(15, 5, ) designs has long been answered for all values of except = 2. Here, we resolve this last undecided case and prove that 4-(15, ...
DAM
2007
13 years 4 months ago
2007
A Skolem sequence is a sequence a1, a2, . . . , a2n (where ai ∈ A = {1, . . . , n}), each ai occurs exactly twice in the sequence and the two occurrences are exactly ai position...
EJC
2008
13 years 4 months ago
2008
This paper revisits the existence and construction problems for polygonal designs (a special class of partially balanced incomplete block designs associated with regular polygons)...