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Paper IPM / M / 186  


Abstract:  
A set of necessary conditions for the existence of a large set of tdesigns, LS[N](t,k,v) is N((v−i)  (k−i)) for i=0,1,…,t. We show that these conditions are sufficient for N=3, t=2,3 or 4, and k ≤ 8.
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