Results 51 to 60 of about 762,341 (222)

Some remarks on the invariant subspace problem for hyponormal operators

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We make some remarks concerning the invariant subspace problem for hyponormal operators. In particular, we bring together various hypotheses that must hold for a hyponormal operator without nontrivial invariant subspaces, and we discuss the existence of ...
Vasile Lauric
doaj   +1 more source

Learning Koopman Eigenfunctions and Invariant Subspaces From Data: Symmetric Subspace Decomposition

open access: yesIEEE Transactions on Automatic Control, 2019
This article develops data-driven methods to identify eigenfunctions of the Koopman operator associated with a dynamical system and subspaces that are invariant under the operator.
Masih Haseli, J. Cort'es
semanticscholar   +1 more source

The Breadth-one $D$-invariant Polynomial Subspace [PDF]

open access: yes, 2014
We demonstrate the equivalence of two classes of $D$-invariant polynomial subspaces introduced in [8] and [9], i.e., these two classes of subspaces are different representations of the breadth-one $D$-invariant subspace.
Jiang, Xue, Zhang, Shugong
core  

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  

Initial monomial invariants of holomorphic maps

open access: yes, 2015
We study a new biholomorphic invariant of holomorphic maps between domains in different dimensions based on generic initial ideals. We start with the standard generic monomial ideals to find invariants for rational maps of spheres and hyperquadrics ...
Grundmeier, Dusty, Lebl, Jiri
core   +1 more source

Noise Characterization: Keeping Reduction Based Per-turbed Quantum Walk Search Optimal

open access: yesEPJ Web of Conferences, 2019
In a recent work by Novo et al. (Sci. Rep. 5, 13304, 2015), the invariant subspace method was applied to the study of continuous-time quantum walk (CTQW).
Chiang Chen-Fu, Hsieh Chang-Yu
doaj   +1 more source

On The Normality Set of Linear Operators

open access: yesمجلة بغداد للعلوم, 2020
In this paper, the Normality set  will be investigated. Then, the study highlights some concepts properties and important results. In addition, it will prove that every operator with normality set has non trivial invariant subspace of  .
Laith K. Shaakir, Anas A. Hijab
doaj   +1 more source

Cross-View Feature Learning via Structures Unlocking Based on Robust Low-Rank Constraint

open access: yesIEEE Access, 2020
The cross-view multimedia are widely existed and attract many attentions in recent years. Nevertheless, it is noted that the phenomenon, that data in different classes from same view are more similar than that in same class from different views, is ...
Ao Li   +5 more
doaj   +1 more source

Born-Oppenheimer approximation for an atom in constant magnetic fields

open access: yes, 2015
We obtain a reduction scheme for the study of the quantum evolution of an atom in constant magnetic fields using the method developed by Martinez, Nenciu and Sordoni based on the construction of almost invariant subspace. In Martinez-Sordoni \cite{MaSo2}
Ashida, Sohei
core   +1 more source

Combinatorics of symplectic invariant tensors [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2015
An important problem from invariant theory is to describe the subspace of a tensor power of a representation invariant under the action of the group. According to Weyl's classic, the first main (later: 'fundamental') theorem of invariant theory states ...
Martin Rubey, Bruce W. Westbury
doaj   +1 more source

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