Journal ArticleDOI
A remark on the conjecture of Erdös, Faber and Lovász
Hauke Klein,Marian Margraf +1 more
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In this article, the celebrated Erdos, Faber and Lovasz Conjecture may be expressed as follows: any linear hypergraph on ν points has chromatic index at most ν, where ν denotes the linear intersection number and χ denotes the chromatic number of the graph.Abstract:
The celebrated Erdos, Faber and Lovasz Conjecture may be stated as follows: Any linear hypergraph on ν points has chromatic index at most ν We show that the conjecture is equivalent to the following assumption: For any graph \(\chi(G) \leq \nu(G)\), where ν(G) denotes the linear intersection number and χ(G) denotes the chromatic number of G As we will see \(\chi(G) + \chi(\bar{G}) \leq \nu(G)+ \nu(\overline{G})\) for any graph G = (V, E), where \((\overline{G})\) denotes the complement of G Hence, at least G or \(\overline{G}\) fulfills the conjectureread more
Citations
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On edge coloring of hypergraphs and erdös–faber–lovász conjecture
Viji Paul,K. A. Germina +1 more
TL;DR: It is proved that the Erdos–Faber–Lovasz conjecture is true for all linear hypergraphs on n vertices with .
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A note on Erd\"os-Faber-Lov\'asz Conjecture and edge coloring of complete graphs
TL;DR: The correctness of the Erdos-Faber-Lovasz Conjecture is proved for a new infinite class of $n$-quasiclusters using a specific edge coloring of the complete graph.
Journal ArticleDOI
The Erdős–Faber–Lovász conjecture is true for n ≤ 12
TL;DR: Hindman proved the conjecture that if a hypergraph has n edges, each of size n, and every pair of edges intersect in at most one vertex, then its vertex chromatic number is equal to n.
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Intersections, circuits, and colorability of line segments
TL;DR: In this article, the authors derived sharp upper and lower bounds on the number of intersection points and closed regions that can occur in sets of line segments with certain structure, in terms of the total number of segments.
Journal ArticleDOI
On hyperedge coloring of weakly trianguled hypergraphs and well ordered hypergraphs
TL;DR: This article proves the assertion that every loopless linear hypergraph H on n vertices can be n -edge-colored, or equivalently q ( H ) ≤ n, where q (H ) is the chromatic index of H, i.e. the smallest number of colors such that intersecting hyperedges of H are colored with distinct colors.
References
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Journal ArticleDOI
Coloring nearly-disjoint hypergraphs with n + o(n) colors
TL;DR: This is an approximate version of the well-known conjecture of Erdős, Faber, and Lovasz stating that the chromatic index of a nearly-disjoint hypergraph on n vertices is at most n + o ( n ).
Book ChapterDOI
On some hypergraph problems of paul erdős and the asymptotics of matchings, covers and colorings
TL;DR: This article summarizes progress on several old hypergraph problems of Paul Erdős and a few questions to which they led and some indication (if any were needed) that Erd� Hungarian questions were the “right” ones.