Hamilton cycles;
perfect matchings;
random graphs;
pseudorandom graphs;
D O I:
10.1137/050627010
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
Given 0 < p < 1, we prove that a pseudorandom graph G with edge density p and sufficiently large order has the following property: Consider any red/blue-coloring of the edges of G and let r denote the proportion of edges which have the color red. Then there is a Hamilton cycle C so that the proportion of red edges of C is close to r. The analogue also holds for perfect matchings instead of Hamilton cycles. We also prove a bipartite version which is used elsewhere to give a minimum-degree condition for the existence of a Hamilton cycle in a 3-uniform hypergraph.
机构:
Charles Univ Prague, Fac Math & Phys, Dept Appl Math, George Town 11800, MalaysiaCharles Univ Prague, Fac Math & Phys, Dept Appl Math, George Town 11800, Malaysia