Difference Set 423 浏览 0关注

In combinatorics, a (v,k,\lambda) difference set is a subset D of a group (mathematics)|group G such that the order of a group|order of G is v, the cardinality|size of D is k, and every nonidentity element of G can be expressed as a product d_1d_2^{-1} of elements of D in exactly \lambda ways.
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