Results 31 to 40 of about 394 (72)

The proof of a conjecture on largest Laplacian and signless Laplacian H-eigenvalues of uniform hypergraphs

open access: yes, 2015
Let $\mathcal{A(}G\mathcal{)},\mathcal{L(}G\mathcal{)}$ and $\mathcal{Q(}% G\mathcal{)}$ be the adjacency tensor, Laplacian tensor and signless Laplacian tensor of uniform hypergraph $G$, respectively.
Qi, Liqun, Shao, Jiayu, Yuan, Xiying
core   +1 more source

On an argument of J.--F. Cardoso dealing with perturbations of joint diagonalizers

open access: yes, 2012
B. Afsari has recently proposed a new approach to the matrix joint diagonalization, introduced by J.--F. Cardoso in 1994, in order to investigate the independent component analysis and the blind signal processing in a wider prospective.
Russo, Francesco G.
core   +1 more source

The Laplacian Eigenvalues and Invariants of Graphs

open access: yes, 2014
In this paper, we investigate some relations between the invariants (including vertex and edge connectivity and forwarding indices) of a graph and its Laplacian eigenvalues.
Pan, Rong-Ying   +2 more
core   +1 more source

M-matrices satisfy Newton's inequalities

open access: yes, 2005
Newton's inequalities $c_n^2 \ge c_{n-1}c_{n+1}$ are shown to hold for the normalized coefficients $c_n$ of the characteristic polynomial of any $M$- or inverse $M$-matrix.
Holtz, Olga
core   +1 more source

Improved Young and Heinz inequalities with the Kantorovich constant

open access: yes, 2015
In this article, we study the further refinements and reverses of the Young and Heinz inequalities with the Kantorovich constant. These modified inequalities are used to establish corresponding operator inequalities on Hilbert space and Hilbert-Schmidt ...
Liao, Wenshi, Wu, Junliang
core  

On the condition numbers of a multiple generalized eigenvalue

open access: yes, 2010
For standard eigenvalue problems, a closed-form expression for the condition numbers of a multiple eigenvalue is known. In particular, they are uniformly 1 in the Hermitian case, and generally take different values in the non-Hermitian case.
Nakatsukasa, Yuji
core  

Streptococcus pneumoniae Serotypes Associated with Death, South Africa, 2012-2018. [PDF]

open access: yesEmerg Infect Dis, 2022
Müller A   +7 more
europepmc   +1 more source

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