4 citations · 6 across the 4 of their papers we have counts for
4 papers · 1 filter
Exact--Relation Graphs
Yangjing Long, Peter F. Stadler
Pairwise compatibility graphs (PCGs) with non-negative integer edge weights recently have been used to describe rare evolutionary events and scenarios with horizontal gene transfer…
Phylogenetic trees and homomorphisms
Yangjing Long
In Chapter 1 we fully characterise pairs of finite graphs which form a gap in the full homomorphism order. This leads to a simple proof of the existence of generalised duality pair…
Word-representability of split graphs
Sergey Kitaev, Yangjing Long, Jun Ma +1
Letters and alternate in a word if after deleting in all letters but the copies of and we either obtain a word (of even or odd length) or a wor…
Gaps in full homomorphism order
Jiří Fiala, Jan Hubička, Yangjing Long
We characterise gaps in the full homomorphism order of graphs.