The Feichtinger Conjecture and Reproducing Kernel Hilbert Spaces
@article{Lata2010TheFC, title={The Feichtinger Conjecture and Reproducing Kernel Hilbert Spaces}, author={Sneh Lata and Vern I. Paulsen}, journal={arXiv: Functional Analysis}, year={2010} }
We prove two new equivalences of the Feichtinger conjecture that involve reproducing kernel Hilbert spaces. We prove that if for every Hilbert space, contractively contained in the Hardy space, each Bessel sequence of normalized kernel functions can be partitioned into finitely many Riesz basic sequences, then a general bounded Bessel sequence in an arbitrary Hilbert space can be partitioned into finitely many Riesz basic sequences. In addition, we examine some of these spaces and prove that…
11 Citations
On the Feichtinger Conjecture
- Mathematics
- 2013
We prove the Feichtinger Conjecture for a class of Bessel sequences of unit norm vectors in a Hilbert space. Also, we prove that every Bessel sequence of unit vectors in a Hilbert space can be…
Graph Laplacians and discrete reproducing kernel Hilbert spaces from restrictions
- Mathematics
- 2015
ABSTRACT We study kernel functions, and associated reproducing kernel Hilbert spaces over infinite, discrete, and countable sets V. Numerical analysis builds discrete models (e.g., finite element)…
Sampling with positive definite kernels and an associated dichotomy
- MathematicsAdvances in Theoretical and Mathematical Physics
- 2020
We study classes of reproducing kernels $K$ on general domains; these are kernels which arise commonly in machine learning models; models based on certain families of reproducing kernel Hilbert…
A characterization of boundary representations of positive matrices in the Hardy space via the Abel product
- MathematicsLinear Algebra and its Applications
- 2019
Discrete reproducing kernel Hilbert spaces: sampling and distribution of Dirac-masses
- Mathematics, Computer ScienceJ. Mach. Learn. Res.
- 2015
For RKHSs $\mathscr{H}$ of functions defined on a prescribed countable infinite discrete set $V$, the distributions of the corresponding Dirac point-masses of $V$ are analyzed in detail.
Feichtinger Conjectures, $R_\varepsilon$-Conjectures and Weaver's Conjectures for Banach spaces
- Mathematics
- 2022
Abstract: Motivated from two decades old famous Feichtinger conjectures for frames, Rε-conjecture and Weaver’s conjecture for Hilbert spaces (and their solution by Marcus, Spielman, and Srivastava),…
A SHORT NOTE ON THE FEICHTINGER CONJECTURE
- Mathematics
- 2011
I. CHALENDAR, E. FRICAIN, D. TIMOTINAbstract. We discuss the equivalence of the Feichtinger Conjecture with a weaker variantand we show its connection with a conjecture of Agler–McCarthy–Seip…
Nonuniform sampling, reproducing kernels, and the associated Hilbert spaces
- Mathematics, Computer Science
- 2016
The results allow inference from samples; more precisely, reconstruction of an "entire" signal, a function a function from $\mathscr{H}$, via generalized interpolation of $f$ from partial information obtained from carefully chosen distributions of sample points.
Consequences of the Marcus/Spielman/Srivastava Solution of the Kadison-Singer Problem
- Mathematics
- 2016
It is known that the famous, intractable 1959 Kadison-Singer problem in C∗-algebras is equivalent to fundamental unsolved problems in a dozen areas of research in pure mathematics, applied…
Generalized Gramians: Creating frame vectors in maximal subspaces
- Mathematics
- 2015
A frame is a system of vectors $S$ in Hilbert space $\mathscr{H}$ with properties which allow one to write algorithms for the two operations, analysis and synthesis, relative to $S$, for all vectors…
References
SHOWING 1-10 OF 69 REFERENCES
A decomposition theorem for frames and the Feichtinger Conjecture
- Mathematics
- 2007
In this paper we study the Feichtinger Conjecture in frame theory, which was recently shown to be equivalent to the 1959 Kadison-Singer Problem in C*-Algebras. We will show that every bounded Bessel…
Frames and the Feichtinger conjecture
- Mathematics
- 2004
We show that the conjectured generalization of the Bourgain-Tzafriri restricted-invertibility theorem is equivalent to the conjecture of Feichtinger, stating that every bounded frame can be written…
The Feichtinger Conjecture for Reproducing Kernels in Model Subspaces
- Mathematics
- 2009
We obtain two results concerning the Feichtinger conjecture for systems of normalized reproducing kernels in the model subspace KΘ=H2⊖ΘH2 of the Hardy space H2, where Θ is an inner function. First,…
Spanning and independence properties of frame partitions
- Mathematics, Computer Science
- 2010
It is proved that in finite dimensional Hilbert spaces, Parseval frames with norms bounded away from 1 can be decomposed into a number of sets whose complements are spanning, where the number of these sets only depends on the norm bound.
Sub-Hardy Hilbert Spaces in the Unit Disk
- Mathematics
- 1994
Hilbert Spaces Inside Hilbert Spaces. Hilbert Spaces Inside H 2 . Cauchy Integral Representations. Nonextreme Points. Extreme Points. Angular Derivatives. Higher Derivatives. Equality of H(b) and…
Syndetic sets, paving and the Feichtinger conjecture
- Mathematics
- 2010
We prove that if a Bessel sequence in a Hilbert space that is indexed by a countably infinite group in an invariant manner can be partitioned into finitely many Riesz basic sequences, then each of…
Discrete Hilbert transforms on sparse sequences
- Mathematics
- 2009
Weighted discrete Hilbert transforms (an)n ↦ ∑n an vn/(z−γn) from ℓ2ν to a weighted L2‐space are studied, with Γ=(γn) a sequence of distinct points in the complex plane and v=(vn) a corresponding…
Function Theory in the Unit Ball of Cn
- Mathematics
- 1980
Preliminaries.- The Automorphisms of B.- Integral Representations.- The Invariant Laplacian.- Boundary Behavior of Poisson Integrals.- Boundary Behavior of Cauchy Integrals.- Some Lp-Topics.-…
Analytic Reproducing Kernels and Factorization
- Mathematics
- 2004
This paper relates questions about factorizations of positive matrices to properties of analytic reproducing kernel Hilbert spaces. In particular the question of when the polynomials are dense in a…
Interpolation and sampling hypersurfaces for the Bargmann-Fock space in higher dimensions
- Mathematics
- 2004
We study those smooth complex hypersurfaces W in having the property that all holomorphic functions of finite weighted Lp norm on W extend to entire functions with finite weighted Lp norm. Such…