Math @ Duke

Publications [#236022] of Robert Calderbank
Papers Published
 Calderbank, AR, Inequalities for quasisymmetric designs,
Journal of Combinatorial Theory, Series A, vol. 48 no. 1
(1988),
pp. 5364, ISSN 00973165
(last updated on 2018/02/18)
Abstract: A 2design is said to be quasisymmetric if there are two block intersection sizes. We obtain inequalities satisfied by the parameters of a quasisymmetric design using linear programming techniques. The same methods apply to codes with covering radius 2 with the property that the number of codewords at distance 2 from a given vector ν depends on the distance of ν from the code. © 1988.


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