Results 81 to 90 of about 1,296 (214)
Besselian g-frames and near g-Riesz bases
, 2011 In this paper we introduce and study near g-Riesz basis, Besselian g-frames and unconditional g-frames. We show that a near g-Riesz basis is a Besselian g-frame and we conclude that under some conditions the kernel of associated synthesis ...
A. Najati, M.R. Abdollahpour
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Riesz bases and their dual modular frames in Hilbert C∗-modules
, 2008 We investigate dual frames of modular frames and Riesz bases in Hilbert C∗-modules. In Hilbert C∗-modules, a Riesz basis may have many dual modular frames, and it may even admit two different dual modular frames both of which are Riesz bases.
Jing, Wu +3 more
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Wavelets‐Associated Approximation to the Family of New Class of q‐Szász Operators Via q‐Analog
Journal of Function Spaces, Volume 2026, Issue 1, 2026.This study investigates the approximation properties of a recently developed class of q‐Szász–Mirakjan operators integrated with wavelets. By constructing these q‐Szász‐type operators and introducing their Kantorovich variants, we establish Lp‐approximation results for 1 ≤ p ≤ ∞.
Md. Nasiruzzaman +4 more
wiley +1 more source
A Riesz basis of wavelets and its dual with quintic deficient splines [PDF]
, 2006 peer reviewedIn this note, the dual of the Riesz basis of quintic splines obtained by Bastin and Laubin in [1] is explicitely constructed. ([1]=Quintic deficient splines wavelets, in Bull. Soc. Roy. Sc. Liège, Vol.
Bastin, F., Bastin, Françoise
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Karpatsʹkì Matematičnì Publìkacìï, 2018 We study a problem with periodic boundary conditions for a $2n$-order differential equation whose coefficients are non-self-adjoint operators. It is established that the operator of the problem has two invariant subspaces generated by the involution ...
Ya.O. Baranetskij +3 more
doaj +1 more source
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2014 A nonlocal problem for mixed type equation with a singular coefficient and the spectral parameter is formulated in the field, which hyperbolic part is vertical half-strip and elliptic part is rectangle.
Anton A Abashkin
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On a necessary aspect for the Riesz basis property for indefinite Sturm‐Liouville problems [PDF]
Mathematische Nachrichten, 2014 In 1996, H. Volkmer observed that the inequality urn:x-wiley:dummy:mana201300104:equation:mana201300104-math-0001is satisfied with some positive constant for a certain class of functions f on [ − 1, 1] if the eigenfunctions of the problem urn:x-wiley:dummy:mana201300104:equation:mana201300104-math-0003form a Riesz basis of the Hilbert space .
openaire +4 more sources
, 2020 International audienceWe establish a criterion for a set of eigenfunctions of the one-dimensional Schrödinger operator with distributional potential and boundary conditions containing the eigenvalue parameter to be a Riesz basis for L₂(0, π)
Guliyev, Namig
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Boundary feedback stabilization of a three-layer sandwich beam : Riesz basis approach
, 2005 In this paper, we consider the boundary stabilization of a sandwich beam which consists of two outer stiff layers and a compliant middle layer. Using Riesz basis approach, we show that there is a sequence of generalized eigenfunctions, which forms a ...
Jun-Min Wang +5 more
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Boundary controllability and source reconstruction in a viscoelastic string under external traction [PDF]
, 2013 Treatises on vibrations devote large space to study the dynamical behavior of an elastic system subject to known external tractions since usually a ``system'' is part of a chain of mechanisms which disturb the ``system'' for example due to the periodic ...
Luciano Pandolfi, Pandolfi, Luciano
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