
The aim of this paper is to generalize the notion of the coloring complex of a graph to hypergraphs. We present three different interpretations of those complexes -- a purely combinatorial one and two geometric ones. It is shown, that most of the properties, which are known to be true for coloring complexes of graphs, break down in this more general setting, e.g., Cohen-Macaulayness and partitionabilty. Nevertheless, we are able to provide bounds for the $f$- and $h$-vectors of those complexes which yield new bounds on chromatic polynomials of hypergraphs. Moreover, it is shown that the coloring complex of a hypergraph has a wedge decomposition, though we conjecture that in general this decomposition is not homotopy equivalent to a wedge of spheres. In addition, we can completely characterize those hypergraphs whose coloring complex is connected.
2 figures, small changes and counterexample to a conjecture added
Cohen-Macaulay modules, hypergraph, coloring complex, chromatic polynomial, Coloring complex, Hypergraphs, Cohen, Article, Macaulay, Theoretical Computer Science, Chromatic polynomial, Cohen–Macaulay, Coloring of graphs and hypergraphs, 05C65, 05C15, 05E45, 52B05, Ehrhart theory, Hypergraph, wedge lemma, FOS: Mathematics, Discrete Mathematics and Combinatorics, Mathematics - Combinatorics, Combinatorics (math.CO), Wedge lemma
Cohen-Macaulay modules, hypergraph, coloring complex, chromatic polynomial, Coloring complex, Hypergraphs, Cohen, Article, Macaulay, Theoretical Computer Science, Chromatic polynomial, Cohen–Macaulay, Coloring of graphs and hypergraphs, 05C65, 05C15, 05E45, 52B05, Ehrhart theory, Hypergraph, wedge lemma, FOS: Mathematics, Discrete Mathematics and Combinatorics, Mathematics - Combinatorics, Combinatorics (math.CO), Wedge lemma
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 4 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
