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pro vyhledávání: '"Alencar, Jorge"'
In this paper, we characterize all graphs with eigenvectors of the signless Laplacian and adjacency matrices with components equal to $\{- 1, 0, 1\}.$ We extend the graph parameter max $k$-cut to square matrices and prove a general sharp upper bound,
Externí odkaz:
http://arxiv.org/abs/2211.15314
The Distance Geometry Problem asks for a realization of a given weighted graph in $\mathbb{R}^K$. Two variants of this problem, both originating from protein conformation, are based on a given vertex order (which abstracts the protein backbone). Both
Externí odkaz:
http://arxiv.org/abs/2110.01231
Publikováno v:
In Discrete Applied Mathematics 15 September 2024 354:83-93
Autor:
Alencar, Jorge, de Lima, Leonardo
Let $G$ be a simple graph. In 1986, Herbert Wilf asked what kind of graphs have an eigenvector with entries formed only by $\pm 1$? In this paper, we answer this question for the adjacency, Laplacian and signless Laplacian matrix of a graph. Besides,
Externí odkaz:
http://arxiv.org/abs/1909.11860
Autor:
Alencar, Jorge Couto de
Publikováno v:
Repositório Institucional da UFCUniversidade Federal do CearáUFC.
ALENCAR, Jorge Couto de. Chanbara: a atmosfera nos filmes de Samurai do Século XXI. 2017. 136f. – Dissertação (Mestrado) – Universidade Federal do Ceará, Programa de Pós-Graduação em Comunicação Social, Fortaleza (CE), 2017.
Submitt
Submitt
Externí odkaz:
http://www.repositorio.ufc.br/handle/riufc/26631
Publikováno v:
In Linear Algebra and Its Applications 15 April 2023 663:222-240
Autor:
Alencar, Jorge, de Lima, Leonardo
Publikováno v:
In Linear Algebra and Its Applications 1 April 2021 614:301-315
Publikováno v:
Discussiones Mathematicae Graph Theory, Vol 40, Iss 2, Pp 379-391 (2020)
The eigenvalues of a graph are those of its adjacency matrix. Recently, Cioabă, Haemers and Vermette characterized all graphs with all but two eigenvalues equal to −2 and 0. In this article, we extend their result by characterizing explicitly all
Externí odkaz:
https://doaj.org/article/af53bfa58a0f40699d89f32a871ae280
Publikováno v:
In Discrete Applied Mathematics 15 March 2019 256:5-10
Autor:
Alencar, Jorge1 jorgealencar@iftm.edu.br, de Lima, Leonardo2 leonardo.delima@ufpr.br
Publikováno v:
Proyecciones - Journal of Mathematics. Dec2021, Vol. 40 Issue 6, p1587-1602. 16p.