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On some inequalities for the generalized joint numerical radius of semi-Hilbert space operators
(Springer, 2021-08-13)
Let A be a positive (semidefinite) bounded linear operator on a complex Hilbert space (H, ⟨ · , · ⟩). The semi-inner product induced by A is defined by ⟨ x, y⟩ A: = ⟨ Ax, y⟩ for all x, y∈ H and defines a seminorm ‖ · ‖ A ...
Numerical approximation of equations involving minimal/maximal operators by successive solution of obstacle problems
(Elsevier Science, 2018-11)
Let Ω⊂R2 be a polygonal domain, and let Li, i=1,2, be two elliptic operators of the form Liu(x):=−div(Aix∇u(x))+cixu(x)−fix.Motivated by the results in Blanc et al. (2016), we propose a numerical iterative method to compute ...
Operaciones: multiplicación de matrices booleanas, parte 1
(2018-12-19)
En el presente vídeo se presenta la definición de la multiplicación booleana de matrices, para el caso específico de una matriz final por una matriz columna del mismo número de entradas. El vídeo termina presentando ejemplo ...
Determination of the technical state of suspension elements based on the OMA-LSCE method
(Collegio Ingegneri Ferroviari Italiani, 2012-01-01)
A study is established regarding the behavior of the vehicle under the influence of the damping elements, proposing a methodology for the validation of the technical state of the dampers through the registration of dynamic ...
Determinazione dello stato tecnico degli elementi delle sospensioni sulla base del metodo OMA-LSCE
(Collegio Ingegneri Ferroviari Italiani, 2012-01-01)
A study is established regarding the behavior of the vehicle under the influence of the damping elements, proposing a methodology for the validation of the technical state of the dampers through the registration of dynamic ...
Extreme points of numerical ranges of quasihyponormal operators
(Universidad Nacuional de Colombia; Sociedad Colombiana de matemáticas, 1993)
It is shown that a quasihypnormal operator on a Hilbert space having 0 as a boundary point of its numerical range is hyponormal. A necessary and sufficient condition is given for the extreme points of the numerical range ...