Approximability of the upper chromatic number of hypergraphs
نویسندگان
چکیده
منابع مشابه
Approximability of the upper chromatic number of hypergraphs
A C-coloring of a hypergraph H = (X, E) is a vertex coloring φ : X → N such that each edge E ∈ E has at least two vertices with a common color. The related parameter χ(H), called the upper chromatic number of H, is the maximum number of colors can be used in a C-coloring of H. A hypertree is a hypergraph which has a host tree T such that each edge E ∈ E induces a connected subgraph in T . Notat...
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ژورنال
عنوان ژورنال: Discrete Mathematics
سال: 2015
ISSN: 0012-365X
DOI: 10.1016/j.disc.2014.08.007