Results 101 to 110 of about 1,296 (214)

A Riesz basis for Bargmann-Fock space related to sampling and interpolation

Arkiv för Matematik, 1992
Let \(A^ p(C)\), \(1\leq ...
Gröchenig, K., Walnut, D.
openaire   +3 more sources

Hilbert Space Frames Containing a Riesz basis and Banach Spaces which have no Subspace Isomorphic to C^0

, 1996
We prove that a Hilbert space frame {fi}i∈Icontains a Riesz basis if every subfamily {fi}i∈J,J⊆I, is a frame for its closed span. Secondly we give a new characterization of Banach spaces which do not have any subspace isomorphic toc0.
Christensen, Ole, Casazza, P., Casazza, Peter G.   +2 more
core   +1 more source

Basis properties of eigenfunctions of nonlinear Sturm-Liouville problems

Electronic Journal of Differential Equations, 2000
We consider three nonlinear eigenvalue problems that consist of $$-y''+f(y^2)y=lambda y$$ with one of the following boundary conditions: $$displaylines{ y(0)=y(1)=0 quad y'(0)=p ,,cr y'(0)=y(1)=0 quad y(0)=p,, cr y'(0)=y'(1)=0 quad y(0)=p,, }$$ where $p$
Peter E. Zhidkov
doaj  

Two-channel sampling in wavelet subspaces

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
We develop two-channel sampling theory in the wavelet subspace V1 from the multi resolution analysis {Vj}j∈𝕫. Extending earlier results by G. G. Walter [11], W. Chen and S. Itoh [2] and Y. M.
Kim J.M., Kwon K.H.
doaj   +1 more source

Riesz basis generation, eigenvalues distribution, and exponential stability for a euler-bernoulli beam with joint feedback control

, 2001
Using an abstract result on Riesz basis generation for discrete operators in general Hilbert spaces, we show, in this article, that the generalized eigenfunctions of an Euler-Bernoulli beam equation ith oint linear feedback control form a Riesz basis for
Guo, Bao-Zhu, Chan, K.Y.
core   +1 more source

Research on fractional symmetry based on Riesz derivative

AIP Advances
The variational problem, Noether symmetry and conserved quantity, and Lie symmetry and conserved quantity of singular systems are investigated on the basis of Riesz derivatives.
Cai Wang, Chuan-Jing Song
doaj   +1 more source

Structure and asymptotic expansion of eigenvalues of an integral-type nonlocal problem

Electronic Journal of Differential Equations, 2016
We study the structure of eigenvalues of second-order differential equations with nonlocal integral boundary conditions. Moreover, we consider the asymptotic expansion of the eigenvalues and the corresponding eigenfunctions, which shows that the ...
Zhong-Cheng Zhou, Fang-Fang Liao
doaj  

On the Equivalence Between a Minimal Codomain Cardinality Riesz Basis Construction, a System of Hadamard–Sylvester Operators, and a Class of Sparse, Binary Optimization Problems

, 2014
Piecewise, low-order polynomial, Riesz basis families are constructed such that they share the same coefficient functionals of smoother, orthonormal bases in a localized indexing subset.
Nelson, JDB
core  

On the relation of the frame-related operators of fusion frame systems. [PDF]

Sampl Theory Signal Process Data Anal, 2023
Köhldorfer L, Balazs P.
europepmc   +1 more source

Squares of riesz spaces

, 2011
Bu tezde, bir Riesz uzayının karesi üzerine çalışılmıştır. Önce ispatlarda temel olan Riesz uzaylarında fonksiyonel hesap hakkında inceleme yapılmış, sonra bir Riesz uzayının karesinin varlığı verilerek ile nin karesi arasında örgü operasyonlarına bağlı ...
Bilici, Fatma
core