Results 61 to 70 of about 601 (93)

Estimating eigenvalues of matrices by induced norms

open access: yes, 2011
A classical result of Konig in terms of matrices states that for 1 p 0 not depending on the matrix A , where ‖A‖q,p denotes the norm of A viewed as an operator from q into n p .
C. Michels
semanticscholar   +1 more source

Grothendieck's inequality and applications

open access: yes, 2011
We give a small survey in connection with the famous Grothendieck’s inequality. We consider some classical applications, an application to the geometry of Banach spaces as well as applications to the well known problem of whether the Sp -algebras with ...
O. Reinov
semanticscholar   +1 more source

Study of a differential operator of Heun type arising in fluid dynamics

open access: yes, 2009
The paper studies the non-selfadjoint linear differential operator Ly = d dt ( (1−acos t)y+bsin t dy dt ) acting in the Hilbert space L2(−π,π) that originated from a steady state stability problem in fluid dynamics.
M. Chugunova, H. Volkmer
semanticscholar   +1 more source

A note on lineability [PDF]

open access: yesarXiv, 2009
In this note we answer a question concerning lineability of the set of non-absolutely summing operators.
arxiv  

Ideal of hypercyclic operators that factor through $\ell^p$ [PDF]

open access: yesarXiv, 2021
We study the injective and surjective hull of operator ideals generated by hypercyclic backward weighted shifts that factor through $\ell^p$.
arxiv  

On the range kernel orthogonality and p-symmetric operators

open access: yes, 2006
Let H be a separable infinite dimensional complex Hilbert space, and let L(H) denote the algebra of all bounded linear operators on H . For given A ∈ L(H) , we define the derivation δA : L(H) −→ L(H) by δA(X) = AX − XA .
S. Bouali, Y. Bouhafsi
semanticscholar   +1 more source

Quasi-Fredholm, Saphar Spectra for Integrated Semigroup [PDF]

open access: yesarXiv, 2018
In this paper, we show a spectral inclusion of integrated semigroups for Saphar, essentially Saphar and quasi-Fredholm spectra.
arxiv  

Interpolation properties for some scales of approximation spaces [PDF]

open access: yesarXiv, 2002
We obtain a result concerning the stability under the interpolation with functional parameter method for the approximation spaces of Lorentz-Marcinkiewicz type and also for the approximation spaces generated by symmetric norming functions of a certain type.
arxiv  

The Price of the Plot in Aristotle's Poetics

open access: yes, 2006
Plato's critique of "the imitative tribe" in Book X of Republic calls for a defense of poetry, and Aristotle initiates that effort in Poetics. Taking his cue from Plato, he makes imitation the key concept and thus associates poetry with other kinds of ...
R. Seamon
semanticscholar   +1 more source

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