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COMBINATORICS
2006
98views more  COMBINATORICS 2006»
8 years 3 months ago
A Few More Cyclic Steiner 2-Designs
In this paper, we prove the existence of a cyclic (v, 4, 1)-BIBD for v = 12t + 4, 3 t 50 using computer programs, which are useful in recursive constructions for cyclic designs....
Kejun Chen, Ruizhong Wei
IWOCA
2009
Springer
149views Algorithms» more  IWOCA 2009»
8 years 10 months ago
Randomized Postoptimization of Covering Arrays
The construction of covering arrays with the fewest rows remains a challenging problem. Most computational and recursive constructions result in extensive repetition of coverage. W...
Peyman Nayeri, Charles J. Colbourn, Goran Konjevod
DCC
2006
IEEE
9 years 3 months ago
Roux-type constructions for covering arrays of strengths three and four
A covering array CA(N; t, k, v) is an N ? k array such that every N ? t sub-array contains all t-tuples from v symbols at least once, where t is the strength of the array. Coverin...
Charles J. Colbourn, Sosina Martirosyan, Tran van ...
DCC
2008
IEEE
9 years 3 months ago
Explicit constructions for perfect hash families
Let k, v, t be integers such that k v t 2. A perfect hash family PHF(N; k, v, t) can be defined as an N ? k array with entries from a set of v symbols such that every N ?t suba...
Sosina Martirosyan, Tran van Trung
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