Results 111 to 120 of about 1,296 (214)
Riesz basis of exponentials for a union of cubes in R^{d}
, 2006 18 pages, 1 ...
openaire +2 more sources
Riesz bases of exponentials for multi-tiling measures
, 2023 Let $G$ be a closed subgroup of ${\mathbb R}^d$ and let $\nu$ be a Borel probability measure admitting a Riesz basis of exponentials with frequency sets in the dual group $G^{\perp}$.
Sheynis, Alexander, Lai, Chun-Kit
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A topology optimization algorithm for magnetic structures based on a hybrid FEM-BEM method utilizing the adjoint approach. [PDF]
Sci Rep, 2022 Wautischer G +4 more
europepmc +1 more source
, 2012 Under the assumption that V∈L2([0,π];dx), we derive necessary and sufficient conditions in terms of spectral data for (non-self-adjoint) Schrödinger operators −d2/dx2+V in L2([0,π];dx) with periodic and antiperiodic boundary conditions to possess a Riesz
Gesztesy, Fritz +3 more
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On sufficient density conditions for lattice orbits of relative discrete series. [PDF]
Arch Math, 2022 Enstad U, van Velthoven JT.
europepmc +1 more source
An Angle Criterion for Riesz Bases
, 1999 We present a characterization of Riesz bases in terms ofthe angles between certain finite dimensional subspaces.
Bittner, B., Lindner, Alexander M
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Riesz Basicity for General Systems of Functions
, 2020 In this paper we find the general conditions for a complete biorthogonal conjugate system to form a Riesz basis. We show that if a complete biorthogonal conjugate system is uniformly bounded and its coefficient space is solid, then the system forms a ...
A M Sarsenbi, P A Terekhin
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On the Riesz fusion bases in Hilbert spaces
, 2013 In this paper we investigate the connection between fusion frames and obtain a relation between indexes of the synthesis operators of a Besselian fusion frame and associated frame to it. Next we introduce a new notion of a Riesz fusion bases in a Hilbert
Asgari, Mohammad Sadegh
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We start by introducing and studying the definition of a Riesz basis in a Krein space $(\mathcal{K},[.,.])$, along with a condition under which a Riesz basis becomes a Bessel sequence.
Johnson, P. Sam, Jahan, Shah
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Sparse Wavelet Representation of Differential Operators with Piecewise Polynomial Coefficients
, 2019 We propose a construction of a Hermite cubic spline-wavelet basis on the interval and hypercube. The basis is adapted to homogeneous Dirichlet boundary conditions.
Černá, Dana, Finěk, Václav
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