[Pseudotumoral peritoneal tuberculosis: about 14 cases]. [PDF]
Pan Afr Med J, 2022 Bouchaib AE +4 more
europepmc +1 more source
On the spectral norm of a doubly stochastic matrix and level-k circulant matrix
Special MatricesA simple proof using Birkhoff theorem is given for the result that the spectral norm of a doubly stochastic matrix is 1. We also show that the result generalizes the results of İpek, Bozkurt, and Jiang and Zhou on circulant matrices and rr-circulant ...
Jiang Zhao-Lin, Tam Tin-Yau
doaj +1 more source
Improved Young and Heinz inequalities with the Kantorovich constant [PDF]
arXiv, 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 norm inequalities.
arxiv
Enhanced Young-type inequalities utilizing Kantorovich approach for semidefinite matrices
Open MathematicsThis article introduces new Young-type inequalities, leveraging the Kantorovich constant, by refining the original inequality. In addition, we present a range of norm-based inequalities applicable to positive semidefinite matrices, such as the Hilbert ...
Bani-Ahmad Feras +1 more
doaj +1 more source
Some numerical characteristics of Sylvester and Hadamard matrices [PDF]
arXiv, 2015 We introduce numerical characteristics of Sylvester and Hadamard matrices and give their estimates and some of their applications.
arxiv
Sustainable Mortars for Application in the Cultural Heritage Field. [PDF]
Materials (Basel), 2021 Monaco M +3 more
europepmc +1 more source
Crouzeix's conjecture, compressions of shifts, and classes of nilpotent matrices
Concrete OperatorsThis article studies the level set Crouzeix (LSC) conjecture, which is a weak version of Crouzeix’s conjecture that applies to finite compressions of the shift.
Bickel Kelly +4 more
doaj +1 more source
An extension of Harnack type determinantal inequality [PDF]
arXiv, 2017 We revisit and comment on the Harnack type determinantal inequality for contractive matrices obtained by Tung in the nineteen sixtieth and give an extension of the inequality involving multiple positive semidefinite matrices.
arxiv
The advantages and synergistic effects of Gunnera (Gundelia tournefortii L.) extract and protexin in chicken production. [PDF]
Vet Med Sci, 2021 Gholami-Ahangaran M +3 more
europepmc +1 more source
On the Russo-Dye Theorem for positive linear maps [PDF]
Linear Algebra Appl. 2019, 2019 We revisit a classical result, the Russo-Dye Theorem, stating that every positive linear map attains its norm at the identity.
arxiv