摘 要: | Let A_n={1,2,…,n} and let %={B_1,B_2,…,B_r} where B_1、B_2,…, B_r are subsets of A_n each of size m. is said to cover all the triples (i, j, k), 1≤i2/3, then V(m, n) is a function of the fraction m/n only and the values of V(m, n) are determined for all m, n with m/n≥2/3. The value of V(m, n) for m/n<2/3 is also discussed.
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