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Families of arcs disconnected by finite sets II

โœ Scribed by M. Rochowski


Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
653 KB
Volume
78
Category
Article
ISSN
0025-584X

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๐Ÿ“œ SIMILAR VOLUMES


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โœ M. Rochowski ๐Ÿ“‚ Article ๐Ÿ“… 1975 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 140 KB

By M. ROCHOWSKI of Katowice (Eingegangen am 5 . 12. 1973) 1. Introduction. I n this paper a generalization (theorem C,) of theorem Ci proved in [3] shall be formulated and as a consequence of it we prove MENOER'S n-Beinsatz (see [l], [2], [4]). The proof of theorem C, shall be published separately i

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A finite family of pairwise intersecting r-sets is a maximal r-clique if it cannot be extended to another r-clique by adding a new r-set. It is intersection critical if it is not possible to replace any edge by some of its proper subsets, without violating the intersection property. We prove that i

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โœ Mika Watanabe ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 856 KB

Watanabe, M., Arrow relations on families of finite sets, Discrete Mathematics 94 (1991) 53-64. Let n, m and k be positive integers. Let X be a set of cardinality n, and let 9 be a family of subsets of X. We write (n, m)-, (n -1, mk), when for all 9 with (S( em, there exists an element x of X such t

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โœ Angel V. Ditchev ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 301 KB

We construct a universal r.e. set in the following manner: For any (n, x) we construct a set Un,, E 8 such that the set of all (z, n, x ) such that z E U,,,, is r.e. We construct the set Un,x by steps, and on step s we build a finite approximation U,,.x,s of U,,,,, and finally we take Let us describ

Families of Finite Sets in which No Inte
โœ A. D'yachkov; P. Vilenkin; D. Torney; A. Macula ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 216 KB

In 1964, Kautz and Singleton (IEEE Trans. Inform. Theory 10 (1964), 363-377) introduced the superimposed code concept. A binary superimposed code of strength s is identified by the incidence matrix of a family of finite sets in which no set is covered by the union of s others (