Results 61 to 70 of about 96,721 (176)

Independent Subspace Analysis of the Sea Surface Temperature Variability: Non-Gaussian Sources and Sensitivity to Sampling and Dimensionality

open access: yesComplexity, 2017
We propose an expansion of multivariate time-series data into maximally independent source subspaces. The search is made among rotations of prewhitened data which maximize non-Gaussianity of candidate sources.
Carlos A. L. Pires, Abdel Hannachi
doaj   +1 more source

Recursive Forward-Backward EDMD: Guaranteed Algebraic Search for Koopman Invariant Subspaces

open access: yesIEEE Access
The implementation of the Koopman operator on digital computers often relies on the approximation of its action on finite-dimensional function spaces. This approximation is generally done by orthogonally projecting on the subspace.
Masih Haseli, Jorge Cortes
doaj   +1 more source

Weak*-closed invariant subspaces and ideals of semigroup algebras on foundation semigroups [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2014
Let S be a locally compact foundation semigroup with identity and                          be its semigroup algebra. Let X be a weak*-closed left translation invariant subspace of    In this paper, we prove that  X  is invariantly  complemented in   if ...
B. Mohammadzadeh
doaj  

Perturbation of Invariant Subspaces

open access: yesJournal of Mathematical Analysis and Applications, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Nearly invariant Brangesian subspaces

open access: yesCanadian Mathematical Bulletin
AbstractThis article describes Hilbert spaces contractively contained in certain reproducing kernel Hilbert spaces of analytic functions on the open unit disc which are nearly invariant under division by an inner function. We extend Hitt’s theorem on nearly invariant subspaces of the backward shift operator on $H^2(\mathbb {D})$ as well as its many ...
Arshad Khan, Sneh Lata, Dinesh Singh
openaire   +3 more sources

Necessary Condition for Vector-Valued Model Spaces to be Invariant Under Conjugation

open access: yesJournal of New Theory, 2019
The $S^{*}$-invariant subspaces of the Hardy-Hilbert space $H^{2}(E)$ (where $E$ is finite dimensional Hilbert space of dimension greater than 1) on the unit disc is well known.
Rewayat Khan, Jamroz Khan
doaj  

Sur les idéaux d'une algèbre de Beurling généralisée

open access: yesLe Matematiche, 2006
In this paper, we characterize the closed ideals of locally m-convex algebras as the linear closed subspaces that are invariant under translation. We also give a weighted algebra analogues of the classical theorems of N. Wiener and P.
Abdellah El Kinani
doaj  

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