Results 51 to 60 of about 2,304 (162)

Nonsolvable Subalgebras of gl(4,R)

Journal of Mathematics, 2016
All the simple and then semisimple subalgebras of gl(4,R) are found. Each such semisimple subalgebra acts by commutator on gl(4,R). In each case the invariant subspaces are found and the results are used to determine all possible subalgebras of gl(4,R ...
Ryad Ghanam, Gerard Thompson
doaj   +1 more source

A Bifurcation Lemma for Invariant Subspaces

SIAM Journal on Applied Dynamical Systems
The Bifurcation from a Simple Eigenvalue (BSE) Theorem is the foundation of steady-state bifurcation theory for one-parameter families of functions. When eigenvalues of multiplicity greater than one are caused by symmetry, the Equivariant Branching Lemma (EBL) can often be applied to predict the branching of solutions. The EBL can be interpreted as the
John M. Neuberger, Nándor Sieben, James W. Swift   +2 more
openaire   +3 more sources

On the weak limit of compact operators on the reproducing kernel Hilbert space and related questions

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2016
By applying the so-called Berezin symbols method we prove a Gohberg- Krein type theorem on the weak limit of compact operators on the non- standard reproducing kernel Hilbert space which essentially improves the similar results of Karaev [5]: We also in ...
Saltan Suna
doaj   +1 more source

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

Complexity, 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

IEEE 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]

Journal 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  

Invariant Subspaces with Invariant Complements [PDF]

Proceedings of the American Mathematical Society, 1969
openaire   +2 more sources

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

Journal 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

Le 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  

Koopman Invariant Subspaces and Finite Linear Representations of Nonlinear Dynamical Systems for Control. [PDF]

PLoS One, 2016
Brunton SL, Brunton BW, Proctor JL, Kutz JN.   +3 more
europepmc   +1 more source