"Two families of graceful cacti" by Christian Barrientos
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Abstract

We present a graceful labeling for each member of a subfamily of quadrangular cacti whose underlying graph correspond to the subclass of rooted binary trees where every level has at most two vertices. We also prove the existence of an $\alpha$-labeling (the most restricted type of graceful labeling) for all cyclic snakes, i.e., those cacti whose blocks are copies of the cycle $C_{4n}$ and its maximum degree is four.

Author ORCID Identifier

https://orcid.org/0000-0003-2838-8687

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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