Spectral properties of generalized Paley graphs
- Autores
- Podesta, Ricardo Alberto; Videla Guzman, Denis Eduardo
- Año de publicación
- 2025
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We study the spectrum of generalized Paley graphs Γ(k, q) = Cay(Fq, Rk),undirected or not, with Rk = {xk: x ∈ F∗q} where q = pm with p primeand k | q − 1. We first show that the eigenvalues of Γ(k, q) are givenby the Gaussian periods η(k,q)i with 0 ≤ i ≤ k − 1. Then, we explicitlycompute the spectrum of Γ(k, q) with 1 ≤ k ≤ 4 and of Γ(5, q) for p ≡ 1(mod 5) and 5 | m. Also, we characterize those GP-graphs having integral spectrum, showing that Γ(k, q) is integral if and only if p divides(q−1)/(p−1). Next, we focus on the family of semiprimitive GP-graphs.We show that they are integral strongly regular graphs (of pseudo-Latinsquare type). Finally, we characterize all integral Ramanujan graphsΓ(k, q) with 1 ≤ k ≤ 4 or where (k, q) is a semiprimitive pair.
Fil: Podesta, Ricardo Alberto. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina
Fil: Videla Guzman, Denis Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina - Materia
-
GENERALIZED PALEY GRAPHS
SPECTRUM
GAUSS PERIODS
RAMANUJAN - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nd/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/286959
Ver los metadatos del registro completo
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Spectral properties of generalized Paley graphsPodesta, Ricardo AlbertoVidela Guzman, Denis EduardoGENERALIZED PALEY GRAPHSSPECTRUMGAUSS PERIODSRAMANUJANhttps://purl.org/becyt/ford/1.1https://purl.org/becyt/ford/1We study the spectrum of generalized Paley graphs Γ(k, q) = Cay(Fq, Rk),undirected or not, with Rk = {xk: x ∈ F∗q} where q = pm with p primeand k | q − 1. We first show that the eigenvalues of Γ(k, q) are givenby the Gaussian periods η(k,q)i with 0 ≤ i ≤ k − 1. Then, we explicitlycompute the spectrum of Γ(k, q) with 1 ≤ k ≤ 4 and of Γ(5, q) for p ≡ 1(mod 5) and 5 | m. Also, we characterize those GP-graphs having integral spectrum, showing that Γ(k, q) is integral if and only if p divides(q−1)/(p−1). Next, we focus on the family of semiprimitive GP-graphs.We show that they are integral strongly regular graphs (of pseudo-Latinsquare type). Finally, we characterize all integral Ramanujan graphsΓ(k, q) with 1 ≤ k ≤ 4 or where (k, q) is a semiprimitive pair.Fil: Podesta, Ricardo Alberto. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; ArgentinaFil: Videla Guzman, Denis Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; ArgentinaThe University of Queensland2025-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/286959Podesta, Ricardo Alberto; Videla Guzman, Denis Eduardo; Spectral properties of generalized Paley graphs; The University of Queensland; Australasian Journal of Combiantorics; 91; 3; 3-2025; 326-3652202-35182202-3518CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://ajc.maths.uq.edu.au/pdf/91/ajc_v91_p326.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:39:43Zoai:ri.conicet.gov.ar:11336/286959instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-08-25 14:39:44.096CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Spectral properties of generalized Paley graphs |
| title |
Spectral properties of generalized Paley graphs |
| spellingShingle |
Spectral properties of generalized Paley graphs Podesta, Ricardo Alberto GENERALIZED PALEY GRAPHS SPECTRUM GAUSS PERIODS RAMANUJAN |
| title_short |
Spectral properties of generalized Paley graphs |
| title_full |
Spectral properties of generalized Paley graphs |
| title_fullStr |
Spectral properties of generalized Paley graphs |
| title_full_unstemmed |
Spectral properties of generalized Paley graphs |
| title_sort |
Spectral properties of generalized Paley graphs |
| dc.creator.none.fl_str_mv |
Podesta, Ricardo Alberto Videla Guzman, Denis Eduardo |
| author |
Podesta, Ricardo Alberto |
| author_facet |
Podesta, Ricardo Alberto Videla Guzman, Denis Eduardo |
| author_role |
author |
| author2 |
Videla Guzman, Denis Eduardo |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
GENERALIZED PALEY GRAPHS SPECTRUM GAUSS PERIODS RAMANUJAN |
| topic |
GENERALIZED PALEY GRAPHS SPECTRUM GAUSS PERIODS RAMANUJAN |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.1 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
We study the spectrum of generalized Paley graphs Γ(k, q) = Cay(Fq, Rk),undirected or not, with Rk = {xk: x ∈ F∗q} where q = pm with p primeand k | q − 1. We first show that the eigenvalues of Γ(k, q) are givenby the Gaussian periods η(k,q)i with 0 ≤ i ≤ k − 1. Then, we explicitlycompute the spectrum of Γ(k, q) with 1 ≤ k ≤ 4 and of Γ(5, q) for p ≡ 1(mod 5) and 5 | m. Also, we characterize those GP-graphs having integral spectrum, showing that Γ(k, q) is integral if and only if p divides(q−1)/(p−1). Next, we focus on the family of semiprimitive GP-graphs.We show that they are integral strongly regular graphs (of pseudo-Latinsquare type). Finally, we characterize all integral Ramanujan graphsΓ(k, q) with 1 ≤ k ≤ 4 or where (k, q) is a semiprimitive pair. Fil: Podesta, Ricardo Alberto. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina Fil: Videla Guzman, Denis Eduardo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Estudios de Matemática. Universidad Nacional de Córdoba. Centro de Investigación y Estudios de Matemática; Argentina |
| description |
We study the spectrum of generalized Paley graphs Γ(k, q) = Cay(Fq, Rk),undirected or not, with Rk = {xk: x ∈ F∗q} where q = pm with p primeand k | q − 1. We first show that the eigenvalues of Γ(k, q) are givenby the Gaussian periods η(k,q)i with 0 ≤ i ≤ k − 1. Then, we explicitlycompute the spectrum of Γ(k, q) with 1 ≤ k ≤ 4 and of Γ(5, q) for p ≡ 1(mod 5) and 5 | m. Also, we characterize those GP-graphs having integral spectrum, showing that Γ(k, q) is integral if and only if p divides(q−1)/(p−1). Next, we focus on the family of semiprimitive GP-graphs.We show that they are integral strongly regular graphs (of pseudo-Latinsquare type). Finally, we characterize all integral Ramanujan graphsΓ(k, q) with 1 ≤ k ≤ 4 or where (k, q) is a semiprimitive pair. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025-03 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://hdl.handle.net/11336/286959 Podesta, Ricardo Alberto; Videla Guzman, Denis Eduardo; Spectral properties of generalized Paley graphs; The University of Queensland; Australasian Journal of Combiantorics; 91; 3; 3-2025; 326-365 2202-3518 2202-3518 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/286959 |
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Podesta, Ricardo Alberto; Videla Guzman, Denis Eduardo; Spectral properties of generalized Paley graphs; The University of Queensland; Australasian Journal of Combiantorics; 91; 3; 3-2025; 326-365 2202-3518 CONICET Digital CONICET |
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eng |
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eng |
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The University of Queensland |
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The University of Queensland |
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