Zobrazeno 1 - 10
of 36
pro vyhledávání: '"María Robbiano"'
Publikováno v:
Symmetry, Vol 10, Iss 7, p 252 (2018)
The total graph of G, T(G) is the graph whose vertex set is the union of the sets of vertices and edges of G, where two vertices are adjacent if and only if they stand for either incident or adjacent elements in G. For k≥2, the k-th iterated total
Externí odkaz:
https://doaj.org/article/6a706afa9d0e4d7fae0f1e2ff4bf0718
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Let $\mathcal{G}$ be a simple undirected connected graph. The signless Laplacian Estrada, Laplacian Estrada and Estrada indices of a graph $\mathcal{G}$ is the sum of the exponentials of the signless Laplacian eigenvalues, Laplacian eigenvalues and e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4aeb117304d4b0e3e3db412eab7b849
https://doi.org/10.1016/j.laa.2019.10.029
https://doi.org/10.1016/j.laa.2019.10.029
A mixed graph $\hat{G}$ is a graph where two vertices can be connected by an edge or by an arc (directed edge). The adjacency matrix , $\hat{A}(\hat{G})$, of a mixed graph has rows and columns indexed by the set of vertices of $\hat{G}$, being its $\
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d917664efdec332a87dfcab894a94b9a
http://hdl.handle.net/10773/33415
http://hdl.handle.net/10773/33415
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
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Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cb7fe17eaebd0b4e57bc792b51991b1
https://doi.org/10.1016/j.laa.2018.12.019
https://doi.org/10.1016/j.laa.2018.12.019
Autor:
María Robbiano
Publikováno v:
Linear Algebra and its Applications. 564:15-27
A permutative matrix is a square matrix such that every row is a permutation of the first row. A circulant matrix is a matrix where each row is a cyclic shift of the row above to the right. The Guo's index $\lambda_0$ of a realizable list is the mini
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed9ff622bf695fab813224c0f13a917e
https://doi.org/10.1016/j.laa.2018.11.023
https://doi.org/10.1016/j.laa.2018.11.023
Publikováno v:
Linear Algebra and its Applications. 545:15-31
For an undirected simple graph G, the line graph L ( G ) is the graph whose vertex set is in one-to-one correspondence with the edge set of G where two vertices are adjacent if their corresponding edges in G have a common vertex. The energy E ( G ) i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d372433572f7f39f36e6e96efb837c90
https://doi.org/10.1016/j.laa.2018.01.025
https://doi.org/10.1016/j.laa.2018.01.025
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Let $G=\left( \mathcal{V}\left( G\right) ,\mathcal{E}\left( G\right) \right) $ be an $\left( n,m\right) $-graph. The Randi\'{c} spread of $G$, $s_{R}(G)$, is defined as the maximum distance of its Randi\'{c} eigenvalues, disregarding the Randi\'{c} s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5e5b7309ec97e0bcae1420dd2d82794
https://doi.org/10.1016/j.laa.2017.07.037
https://doi.org/10.1016/j.laa.2017.07.037
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
A square matrix of order n with n ≥ 2 is called a permutative matrix or permutative when all its rows (up to the first one) are permutations of precisely its first row. In this paper, the spectra of a class of permutative matrices are studied. In p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e729e31ce11fd8f94171ff7d4bcccb8
https://doi.org/10.1016/j.laa.2017.08.007
https://doi.org/10.1016/j.laa.2017.08.007
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
To track the gradual change of the adjacency matrix of a simple graph $\mathcal{G}$ into the signless Laplacian matrix, V. Nikiforov in \cite{NKF} suggested the study of the convex linear combination $A_{\alpha }$ (\textit{$\alpha$-adjacency matrix})
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84d8ba7ab4db84ee92916b2031c47d5f
https://doi.org/10.1016/j.laa.2017.06.035
https://doi.org/10.1016/j.laa.2017.06.035
Publikováno v:
Linear Algebra And Its Applications
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
The energy of a symmetric matrix is the sum of the absolute values of its eigenvalues. We introduce a lower bound for the energy of a symmetric partitioned matrix into blocks. This bound is related to the spectrum of its quotient matrix. Furthermore,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85e830eabc3672b14dd0cdc9d95f1e23
https://doi.org/10.1016/j.laa.2016.10.022
https://doi.org/10.1016/j.laa.2016.10.022