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Some of the next articles are maybe not open access.

A note concerning invariant subspaces of a bounded linear operator on a Banach space

Mathematical Proceedings of the Cambridge Philosophical Society, 1958
openaire   +2 more sources

Invariant Subspaces of Nilpotent Linear Operators. I [PDF]

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 2006
Let $k$ be a field. We consider triples $(V,U,T)$, where $V$ is a finite dimensional $k$-space, $U$ a subspace of $V$ and $T \:V \to V$ a linear operator with $T^n = 0$ for some $n$, and such that $T(U) \subseteq U$. Thus, $T$ is a nilpotent operator on $
Bourbaki N.   +3 more
core   +5 more sources

Operations on Arc Diagrams and Degenerations for Invariant Subspaces of Linear Operators [PDF]

open access: yesTransactions of the American Mathematical Society, 2013
We study geometric properties of varieties associated with invariant subspaces of nilpotent operators. There are reductive algebraic groups acting on these varieties. We give dimensions of orbits of these actions.
Kosakowska, Justyna, Schmidmeier, Markus
core   +4 more sources

Degenerate Multi-Term Equations with Gerasimov–Caputo Derivatives in the Sectorial Case

open access: yesMathematics, 2022
The unique solvability for the Cauchy problem in a class of degenerate multi-term linear equations with Gerasimov–Caputo derivatives in a Banach space is investigated.
Vladimir E. Fedorov, Kseniya V. Boyko
doaj   +1 more source

Hamiltonians with Riesz Bases of Generalised Eigenvectors and Riccati Equations [PDF]

open access: yes, 2010
An algebraic Riccati equation for linear operators is studied, which arises in systems theory. For the case that all involved operators are unbounded, the existence of infinitely many selfadjoint solutions is shown. To this end, invariant graph subspaces
Wyss, Christian
core   +1 more source

A study on the unicellularity of some lower triangular operators [PDF]

open access: yes, 1994
The investigation of invariant subspaces is the first step in the attempt to understand the structure of operators. We will investigate bounded linear operators on Hilbert spaces which have the simplest possible invariant subspace structure. ..
Baik Hyoung Gu, Kang Joo Ho
core   +1 more source

The existence of Hall polynomials for x2-bounded invariant subspaces of nilpotent linear operators

open access: yesJournal of Pure and Applied Algebra, 2022
We prove the existence of Hall polynomials for $x^2$-bounded invariant subspaces of nilpotent linear operators.
Kasjan, Stanisław, Kosakowska, Justyna
openaire   +3 more sources

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