Title
On even-degree subgraphs of linear hypergraphs
Abstract
A subgraph of a hypergraph H is even if all its degrees are positive even integers, and b-bounded if it has maximum degree at most b. Let fb(n) denote the maximum number of edges in a linearn-vertex 3-uniform hypergraph which does not contain a b-bounded even subgraph. In this paper, we show that if b â聣楼 12, then \[ \frac{n \log n}{3 b\log \log n} \leq f_b(n) \leq Bn(\log n)^2 \] for some absolute constant B, thus establishing fb(n) up to polylogarithmic factors. This leaves open the interesting case b = 2, which is the case of 2-regular subgraphs. We are able to show for some constants c, C 0 that \[ c n\log n \leq f_2(n) \leq Cn^{3/2}(\log n)^5. \] We conjecture that f2(n) = n1 + o(1) as n â聠聮 ∞.
Year
DOI
Venue
2012
10.1017/S0963548311000575
Combinatorics, Probability & Computing
Keywords
Field
DocType
interesting case,linear hypergraphs,maximum degree,leq bn,hypergraph h,leq f_2,leq cn,maximum number,3-uniform hypergraph,log n,even-degree subgraphs,leq f_b
Integer,Discrete mathematics,Binary logarithm,Combinatorics,Constraint graph,Hypergraph,Degree (graph theory),Conjecture,Mathematics
Journal
Volume
Issue
ISSN
21
1-2
0963-5483
Citations 
PageRank 
References 
0
0.34
6
Authors
9
Name
Order
Citations
PageRank
Domingos Dellamonica140.77
P. E. Haxell221226.40
T. Łuczak312413.68
Dhruv Mubayi457973.95
B. Nagle5101.64
Yury Person611819.19
V. Rödl7750131.81
Mathias Schacht836137.90
J. Verstraëte900.34