Results 11 to 20 of about 41 (41)

Linear preservers of Tensor product of Unitary Orbits [PDF]

, 2020
It is shown that the linear group of automorphism of Hermitian matrices which preserves the tensor product of unitary orbits is generated by natural automorphisms: change of an orthonormal basis in each tensor factor, partial transpose in each tensor ...
Chi-Kwong Li, Raphael Loewy, Abraham Berman, Yiu-Tung Poon, Moshe Goldberg, Nung-Sing Sze   +5 more
core  

Equality in Wielandt’s eigenvalue inequality

Special Matrices, 2015
In this paper we give necessary and sufficient conditions for the equality case in Wielandt’s eigenvalue inequality.
Friedland Shmuel
doaj   +1 more source

Concrete minimal 3 × 3 Hermitian matrices and some general cases

Demonstratio Mathematica, 2017
Given a Hermitian matrix M ∈ M3(ℂ) we describe explicitly the real diagonal matrices DM such that ║M + DM║ ≤ ║M + D║ for all real diagonal matrices D ∈ M3(ℂ), where ║ · ║ denotes the operator norm.
Klobouk Abel H., Varela Alejandro
doaj   +1 more source

Patterns with several multiple eigenvalues

Special Matrices, 2014
Identified are certain special periodic diagonal matrices that have a predictable number of pairedeigenvalues. Since certain symmetric Toeplitz matrices are special cases, those that have several multiple 5eigenvalues are also investigated further.
Dorsey J., Johnson C.R., Wei Z.
doaj   +1 more source

On the Laplacian index of tadpole graphs

Special Matrices
In this article, we study the Laplacian index of tadpole graphs, which are unicyclic graphs formed by adding an edge between a cycle Ck{C}_{k} and a path Pn{P}_{n}.
Braga Rodrigo O., Veloso Bruno S.
doaj   +1 more source

Geometric approaches to matrix normalization and graph balancing

Forum of Mathematics, Sigma
Normal matrices, or matrices which commute with their adjoints, are of fundamental importance in pure and applied mathematics. In this paper, we study a natural functional on the space of square complex matrices whose global minimizers are normal ...
Tom Needham, Clayton Shonkwiler
doaj   +1 more source

Peripheral Blood Genetic Biomarkers for the Early Diagnosis of Hepatocellular Carcinoma. [PDF]

Front Oncol, 2021
Song T, Li L, Wu S, Liu Y, Guo C, Wang W, Dai L, Zhang T, Wu H, Su B.   +9 more
europepmc   +1 more source

Testosterone inhibits early atherogenesis by conversion to estradiol: critical role of aromatase. [PDF]

Proc Natl Acad Sci U S A, 2001
Nathan L, Shi W, Dinh H, Mukherjee TK, Wang X, Lusis AJ, Chaudhuri G.   +6 more
europepmc   +1 more source

Symmetric Jacobians

Open Mathematics, 2014
Bondt Michiel
doaj   +1 more source

Equalities for orthogonal projectors and their operations

Open Mathematics, 2010
Tian Yongge
doaj   +1 more source