Results 61 to 70 of about 486 (86)

Asymptotic behavior of Gelfand-Naimark decomposition

open access: yes, 2009
Let X = LσU be the Gelfand-Naimark decomposition of X ∈ GLn(C) , where L is unit lower triangular, σ is a permutation matrix, and U is upper triangular. Call u(X) := diagU the u -component of X .
Huajun Huang
semanticscholar   +1 more source

Several inequalities for the largest singular value and the spectral radius of matrices

open access: yes, 2007
For nonnegative matrices A = (aij) ∈ Rn×m , B = (bij) ∈ Rm×n and any t ∈ [0, 1] , we present σ(St(A,B)) σ(A)tσ(B)1−t , in which St(A,B) = (atijb ji ) and σ(·) denotes the largest singular value.
S. Shen, Tingzhu Huang
semanticscholar   +1 more source

Norm inequalities involving matrix monotone functions

open access: yes, 2004
Let A,B, X be complex matrices with A, B Hermitian positive definite and let f : (0,∞) → (0,∞) be matrix monotone increasing. We prove (2 + t) ||| A 1 2 (f (A)Xf ⊥(B) + f ⊥(A)Xf (B))B 1 2 ||| 2 ||| A2X + tAXB + XB2 ||| and (2 + t) ||| f (A)X + Xf (B) |||
Mandeep Singh, H. Vasudeva
semanticscholar   +1 more source

Majorization inequalities related to increasing convex functions in a semifinite von Neumann algebra

open access: yes, 2008
Let μs(x) denote the generalized s -number of an operator x . We show a mojorization inequality ∫ t 0 μs(f (a+b)) ds ∫ t 0 μs(f (a)+ f (b))ds for every increasing convex function with f (0) = 0 and positive τ -measurable operators a , b affiliated with a
Tetsuo Harada
semanticscholar   +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

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

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  

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