THE VACCINATION PROBLEM: A CONTRIBUTION TO ITS SOLUTION.1
نویسندگان
چکیده
منابع مشابه
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Given positive integers m,n, s, t, let z (m,n, s, t) be the maximum number of ones in a (0, 1) matrix of size m× n that does not contain an all ones submatrix of size s× t. We show that if s ≥ 2 and t ≥ 2, then for every k = 0, . . . , s− 2, z (m,n, s, t) ≤ (s− k − 1) nm + kn+ (t− 1)m. This generic bound implies the known bounds of Kövari, Sós and Turán, and of Füredi. As a consequence, we also...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1897
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)90226-0