Publikace na Matematicko-fyzikální fakulta |
2020
Abstrakt
Loebl, Komlos, and Sos conjectured that any graph with at least half of its vertices of degree at least k contains every tree with at most k edges. We propose a version of this conjecture for skew trees, i.e., we consider the class of trees with at most k edges such that the sizes of the colour classes of the trees have a given ratio.
We show that our conjecture is asymptotically correct for dense graphs. The proof relies on the regularity method.
Our result implies bounds on Ramsey number of several trees of given skew. (C) 2020 Elsevier Ltd. All rights reserved.