Gallai's Conjecture for Complete and "Nearly Complete" Graphs
Combinatorics
2022-11-01 v1
Abstract
The famous Gallai's Conjecture states that any connected graph with n vertices has a path decomposition containing at most (n+1)/2 paths. In this note, we explore graphs generated from removing edges from complete graphs. We first provide an explicit construction for a path decomposition of complete graphs that satisfies Gallai's Conjecture. We then use that construction to prove that we can remove stars and certain tadpoles such that the resulting graph still satisfies Gallai's Conjecture. We also introduce a potential general approach through analyzing non-isomorphic path decompositions of complete graphs.
Keywords
Cite
@article{arxiv.2210.16406,
title = {Gallai's Conjecture for Complete and "Nearly Complete" Graphs},
author = {Hua Wang and Andrew Zhang},
journal= {arXiv preprint arXiv:2210.16406},
year = {2022}
}