Results 1 to 10 of about 74 (72)

Direct and inverse polynomial perturbations of hermitian linear functionals

Journal of Approximation Theory, 2011
This paper is devoted to the study of direct and inverse (Laurent) polynomial modifications of moment functionals on the unit circle, i.e., associated with hermitian Toeplitz matrices.
L Moral, L Velázquez
exaly   +2 more sources

On a spectral theorem in paraorthogonality theory [PDF]

, 2016
Motivated by the works of Delsarte and Genin (1988, 1991), who studied paraorthogonal polynomials associated with positive definite Hermitian linear functionals and their corresponding recurrence relations, we provide paraorthogonality theory, in the ...
Cruz Barroso, Ruymán, Perdomo Pío, Francisco, Francisco Perdomo-Pío, Kenier Castillo, Castillo Rodríguez, Kenier, Ruymán Cruz-Barroso   +5 more
core   +1 more source

Short- and long-time behavior in (hypo)coercive ODE-systems and kinetic equations

, 2021
see english abstractWe will discuss hypocoercivity on the level of ODEs and devise a new way to construct strict Lyapunov functionals: Systems of ODEs dx/dt = Ax with semi-dissipative matrix A (i.e.
Achleitner, Franz
core   +1 more source

Extensions of representable linear functionals to unitized quasi *-algebras

, 2013
This paper starts from noting that, under certain conditions, *-representability and extensibility to the unitized *-algebra of a positive linear functional, defined on a *-algebra without unit, are equivalent.
BELLOMONTE, Giorgia
core   +1 more source

Detecting hyperbolic and definite matrix polynomials

, 2010
Hyperbolic or more generally definite matrix polynomials are important classes of Hermitian matrix polynomials. They allow for a definite linearization and can therefore be solved by a standard algorithm for Hermitian matrices.
Voss, H., Niendorf, V.
core   +1 more source

Short- and long-time behavior in (hypo)coercive ODE-systems and kinetic partial differential equations

, 2021
see english abstractWe will discuss hypocoercivity on the level of ODEs and devise a new way to construct strict Lyapunov functionals: Systems of ODEs dx/dt = Ax with semi-dissipative matrix A (i.e.
Achleitner, Franz
core  

Verblunsky parameters and linear spectral transformations [PDF]

, 2009
18 pages, no figures.-- MSC2000 codes: 42C05.In this paper we analyze the behavior of Verblunsky parameters for hermitian linear functionals deduced from canonical linear spectral transformations of a quasi-definite hermitian linear functional.
Marcellán, Francisco, Garza, Luis, Marcellán Español, Francisco José   +2 more
core  

Polinomios ortogonales, funciones de transferencia y transformaciones espectrales [PDF]

, 2007
En esta memoria nos centramos en dos objetivos principales. El primero ha sido el tratamiento del algoritmo de Leverrier-Faddeev desde la perspectiva de los polinomios ortogonales clásicos.
Hernández Benítez, Javier
core  

Short- and long-time behavior in (hypo)coercive ODE-systems and kinetic partial differential equations

, 2022
We will discuss hypocoercivity on the level of ODEs and devise a new way to construct strict Lyapunov functionals: Systems of ODEs dx/dt = Ax with semi-dissipative matrix A (i.e.
Achleitner, Franz; orcid:
core  

GAUSS QUADRATURE FOR LINEAR FUNCTIONALS AND NEW SEQUENCE TRANSFORMATIONS [PDF]

, 2015
This thesis is divided into two parts. In the first one we present an extension of the Gauss quadrature formula for the approximation of the quasi definite linear functionals.
Pozza, Stefano
core