The edge-isoperimetric inequality for powers of cycles

Authors

  • Kristiyan Vasilev Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria

DOI:

https://doi.org/10.55630/mem.2026.55.078-084

Keywords:

edge-isoperimetric inequality, cycle graph

Abstract

This note provides a complete solution to a certain version of the edge-isoperimetric problem for powers of cycle graphs. Namely, it shows that the maximum number of edges induced by a vertex subset of C_s^n of size k is achieved by a set of k consecutive vertices.

Author Biography

Kristiyan Vasilev, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria

Institute of Mathematics and Informatics
Bulgarian Academy of Sciences
Acad. G. Bonchev Str., Block 8
1113 Sofia, Bulgaria

 

References

Andries E. Brouwer and Willem H. Haemers. Spectra of graphs Springer Science & Business Media, 2011.

F. Chung. Discrete isoperimetric inequalities. In Surveys in Differential Geometry IX, International Press, pages 53–82, 2024.

Nikita A. Dubinin, Elizaveta A. Neustroeva, Andrei M. Raigorodskii, and Yakov K. Shubin. Lower and upper bounds for the minimum number of edges in some subgraphs of the Johnson graph. Matematicheskii Sbornik, 215(5):71–95, 2024.

Tamás Makai, Matija Pasch, Kalina Petrova, and Leon Schiller. Sharp thresholds for higher powers of Hamilton cycles in random graphs. arXiv preprint arXiv:2502.14515, 2025.

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Published

2026-05-19

How to Cite

[1]
Vasilev, K. 2026. The edge-isoperimetric inequality for powers of cycles. Mathematics and Education in Mathematics. 55, (May 2026), 078–084. DOI:https://doi.org/10.55630/mem.2026.55.078-084.

Issue

Section

Section A: Mathematical Structures