منابع مشابه
Recent results on p - ranks and Smith normal forms of some 2 − ( v , k , λ ) designs
We survey recent results on p-ranks and Smith normal forms of some 2 − (v, k, λ) designs. In particular, we give a description of the recent work in [11] on the Smith normal forms of the 2-designs arising from projective and affine spaces over Fq .
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Let U, g, k and A be positive integers with u :::: k. A (k, A)-grOUp divisible covering design ((k, A)-GDCD) with type gU is a A-cover of pairs by k-tuples of a gu-set X with u holes of size g, which are disjoint and spanning. The covering number, C(k, A; gil), is the minimum number of blocks in a (k, A)-GDCD of type gUo In this paper, the detennination ofllie fimction C(3, A; gil) begun by [6]...
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ژورنال
عنوان ژورنال: Journal of Combinatorial Theory, Series A
سال: 1978
ISSN: 0097-3165
DOI: 10.1016/0097-3165(78)90047-x