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殷剑兴 《苏州大学学报(医学版)》1994,10(2):95-99
In this pa per,a neui method of constructing almost resolvable two-fold PMDs is given by using finite, fields and elementary Abelian groups. And some new results are also mentioned 相似文献
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本文证明了当v≡10,14,18(mod20) 时,除13个可能的例外,复盖数 C(v,5,2)=[v/5[(v-1)/4]], 其中[x]表示不小于x的最小整数。同时,对v≡9,13,17(mod20)的情况,给出了C(v,5,2)的渐近结果。 相似文献
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Let X be a v-set. Let A be a family of some k-subsets (called bl-ocks) of X. The pair (X, A) is called a balanced incomplete blockdesign, denoted by (u, k, λ) -BIBD, if any two distinct elements ofX are contained in exactly λ blocks of A. Some simple computationshows, for any given integers v, k and λ, a (v, k, λ)-BIBD existsonly if 相似文献
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