On graceful and harmonious labelings of trees
Edinah K. Gnang · arXiv (Cornell University) · 2018
We prove via composition lemmas the Kotzig-Ringel and the Graham-Sloane conjectures, respectively known as the Graceful and Harmonious Labeling Conjectures. We also prove via a stronger form of the composition lemma a stronger version of the Graceful Labeling Conjecture.