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This article is cited in 1 scientific paper (total in 1 paper)
Minimal coverings and maximal packings of $(k-1)$-subsets by $k$-subsets
N. N. Kuzyurin M. V. Lomonosov Moscow State University
Abstract:
This paper studies the asymptotic behavior of functions $M(n,k,k-1,\lambda)$ and $m(n,k,k-1,\lambda)$, equal to the respective cardinalities of the minimal $\lambda$-covering and maximal $\lambda$-packing of all $(k-1)$-subsets of the $n$-element set of its $k$-subsets. It is shown that, if sequence $k=k(n)$ is such that $k(n)/n\to0$ as $n\to\infty$ then $m(n,k,k-1,\lambda)\sim\lambda\cdot\bigl({n\atop k-1}\bigr)\cdot k^{-1}$, and $k(n)/\sqrt n\to0$ as $n\to\infty$, then $M(n,k,k-1,1)\sim\lambda\cdot\bigl({n\atop k-1}\bigr)\cdot k^{-1}$. A consequence of these results is the validity of the Erdös–Hanani conjecture concerning the asymptotic behavior of functions $M(n,k,k-1,1)$ and $m(n,k,k-1,1)$.
Received: 17.03.1975
Citation:
N. N. Kuzyurin, “Minimal coverings and maximal packings of $(k-1)$-subsets by $k$-subsets”, Mat. Zametki, 21:4 (1977), 565–571; Math. Notes, 21:4 (1977), 316–320
Linking options:
https://www.mathnet.ru/eng/mzm7986 https://www.mathnet.ru/eng/mzm/v21/i4/p565
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