Zobrazeno 1 - 5
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pro vyhledávání: '"Juan R. Carmona"'
Autor:
Juan R. Carmona, Jonnathan Rodríguez
Publikováno v:
Linear and Multilinear Algebra. 70:4792-4803
Let D be a simple digraph with eigenvalues z1,z2,…,zn. The energy of D is defined as E(D)=∑i=1n|Re(zi)|, where Re(zi) is the real part of the eigenvalue zi. In this paper, a lower bound for the spe...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64538084c51cfea9d3ab8b7fb0f8092a
https://doi.org/10.1080/03081087.2021.1899109
https://doi.org/10.1080/03081087.2021.1899109
Autor:
Hilal A. Ganie, Juan R. Carmona
Publikováno v:
Discrete Mathematics. 346:113118
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c19b1c2bfd2d34f0f901018f3961127
https://doi.org/10.1016/j.disc.2022.113118
https://doi.org/10.1016/j.disc.2022.113118
Autor:
Juan R. Carmona, Jonnathan Rodríguez
Publikováno v:
Linear Algebra and its Applications. 580:200-211
Let G be a graph on n vertices and λ 1 ≥ λ 2 ≥ … ≥ λ n its eigenvalues. The Estrada index of G is defined as E E ( G ) = ∑ i = 1 n e λ i . In this work, we use an increasing sequence converging to the λ 1 to obtain an increasing sequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::551bb4f3d9a8dfbf6d565b3b92e6d4e7
https://doi.org/10.1016/j.laa.2019.06.018
https://doi.org/10.1016/j.laa.2019.06.018
Publikováno v:
Discrete Mathematics. 344:112303
Let G be a graph on n vertices and λ 1 , λ 2 , … , λ n its eigenvalues. The Estrada index of G is an invariant that is calculated from the eigenvalues of the adjacency matrix of a graph. In this paper, we present some new lower bounds for the Es
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cd07af32cf86e2c22c291dfe0928dde
https://doi.org/10.1016/j.disc.2021.112303
https://doi.org/10.1016/j.disc.2021.112303
Publikováno v:
Linear Algebra and its Applications. 446:304-313
Let R be a nonnegative Hermitian matrix. The energy of R , denoted by E ( R ) , is the sum of absolute values of its eigenvalues. We construct an increasing sequence that converges to the Perron root of R . This sequence yields a decreasing sequence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7473e46dce7097c1409e8f768e504453
https://doi.org/10.1016/j.laa.2014.01.013
https://doi.org/10.1016/j.laa.2014.01.013