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On monoids of endomorphisms of a cycle graph

  • Ilinka Dimitrova , Vitor H. Fernandes , Jörg Koppitz EMAIL logo and Teresa M. Quinteiro
Published/Copyright: October 15, 2024
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Abstract

In this paper, we consider endomorphisms of an undirected cycle graph from Semigroup Theory perspective. Our main aim is to present a process to determine sets of generators with minimal cardinality for the monoids wEndCn and EndCn of all weak endomorphisms and all endomorphisms of an undirected cycle graph Cn with n vertices. We also describe Green’s relations and regularity of these monoids and calculate their cardinalities.

MSC 2010: 05C38; 20M10; 20M20; 05C25

Second and fourth authors: this work is funded by national funds through the FCT - Fundação para a Ciência e a Tecnologia, I.P., under the scope of the projects UIDB/00297/2020 (https://doi.org/10.54499/UIDB/00297/2020) and UIDP/00297/2020 (https://doi.org/10.54499/UIDP/00297/2020) (Center for Mathematics and Applications).


Acknowledgement

We would like to thank the anonymous referee for the valuable comments and suggestions that allowed us to improve this paper.

  1. Communicated by Anatolij Dvurečenskij

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Received: 2023-10-05
Accepted: 2024-02-26
Published Online: 2024-10-15
Published in Print: 2024-10-28

© 2024 Mathematical Institute Slovak Academy of Sciences

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