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Erschienen in: Designs, Codes and Cryptography 9/2023

16.05.2023

Characterizing subgroup perfect codes by 2-subgroups

verfasst von: Junyang Zhang

Erschienen in: Designs, Codes and Cryptography | Ausgabe 9/2023

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Abstract

A perfect code in a graph \(\Gamma \) is a subset C of \(V(\Gamma )\) such that no two vertices in C are adjacent and every vertex in \(V(\Gamma ){\setminus } C\) is adjacent to exactly one vertex in C. Let G be a finite group and C a subset of G. Then C is said to be a perfect code of G if there exists a Cayley graph of G admiting C as a perfect code. It is proved that a subgroup H of G is a perfect code of G if and only if a Sylow 2-subgroup of H is a perfect code of G. This result provides a way to simplify the study of subgroup perfect codes of general groups to the study of subgroup perfect codes of 2-groups. As an application, a criterion for determining subgroup perfect codes of projective special linear groups \(\textrm{PSL}(2,q)\) is given.
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Metadaten
Titel
Characterizing subgroup perfect codes by 2-subgroups
verfasst von
Junyang Zhang
Publikationsdatum
16.05.2023
Verlag
Springer US
Erschienen in
Designs, Codes and Cryptography / Ausgabe 9/2023
Print ISSN: 0925-1022
Elektronische ISSN: 1573-7586
DOI
https://doi.org/10.1007/s10623-023-01240-6

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