A note on two-colorability of nonuniform hypergraphs

March 08, 2018 ยท The Ethereal ยท ๐Ÿ› International Colloquium on Automata, Languages and Programming

๐Ÿ”ฎ THE ETHEREAL: The Ethereal
Pure theory โ€” exists on a plane beyond code

"No code URL or promise found in abstract"

Evidence collected by the PWNC Scanner

Authors Lech Duraj, Grzegorz Gutowski, Jakub Kozik arXiv ID 1803.03060 Category math.CO: Combinatorics Cross-listed cs.DM, cs.DS Citations 5 Venue International Colloquium on Automata, Languages and Programming Last Checked 6 months ago
Abstract
For a hypergraph $H$, let $q(H)$ denote the expected number of monochromatic edges when the color of each vertex in $H$ is sampled uniformly at random from the set of size 2. Let $s_{\min}(H)$ denote the minimum size of an edge in $H$. Erdล‘s asked in 1963 whether there exists an unbounded function $g(k)$ such that any hypergraph $H$ with $s_{\min}(H) \geq k$ and $q(H) \leq g(k)$ is two colorable. Beck in 1978 answered this question in the affirmative for a function $g(k) = ฮ˜(\log^* k)$. We improve this result by showing that, for an absolute constant $ฮด>0$, a version of random greedy coloring procedure is likely to find a proper two coloring for any hypergraph $H$ with $s_{\min}(H) \geq k$ and $q(H) \leq ฮด\cdot \log k$.
Community shame:
Not yet rated
Community Contributions

Found the code? Know the venue? Think something is wrong? Let us know!

๐Ÿ“œ Similar Papers

In the same crypt โ€” Combinatorics

๐Ÿ”ฎ ๐Ÿ”ฎ The Ethereal

Tables of subspace codes

Daniel Heinlein, Michael Kiermaier, ... (+2 more)

math.CO ๐Ÿ› arXiv ๐Ÿ“š 94 cites 10 years ago