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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Partial Covering Arrays and a Generalized Erdo′S - Ko - Rado Property

Carey, Particia A., Godbole, Anant P. 01 January 2010 (has links)
The classical Erdös-Ko-Rado theorem states that if k≤ ⌊n/2⌋ then the largest family of pairwise intersecting k-subsets of [n]={1,. ,n} is of size (n-1 k-1). A family of k subsets satisfying this pairwise intersecting property is called an EKR family. We generalize the EKR property and provide asymptotic lower bounds on the size of the largest family A of k-subsets of [n] that satis es the following property: For each A,B,CεA, each of the four sets A∩B∩C; A∩B∩C̃; A∩B̃∩C;Ã ∩B∩C are non-empty. This generalized EKR (GEKR) property is motivated, generalizations are suggested, and a comparison is made with fixed weight 3-covering arrays. Our techniques are probabilistic, and reminiscent of those used in (A. Godbole, D. Skipper, and R. Sunley, Comb Prob Computing 5 (1996), 105-118) and in the work of Roux, as cited in (N. J. A. Sloane, J Comb Designs 1 (1993), 51-63).

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