Results 41 to 50 of about 850,915 (318)

Corrigendum to: Essential normality, essential norms and hyperrigidity

open access: yes, 2015
In our paper "Essential normality, essential norms and hyperrigidity" we claimed that the restriction of the identity representation of a certain operator system (constructed from a polynomial ideal) has the unique extension property, however the justification we gave was insufficient.
Kennedy, Matthew, Shalit, Orr
openaire   +2 more sources

Essential norm of the differential operator [PDF]

open access: yesOperators and Matrices, 2019
This paper is a follow-up contribution to our work [10] where we studied some spectral properties of the differential operator $D$ acting between generalized Fock spaces $\mathcal{F}_{(m,p)}$ and $\mathcal{F}_{(m,q)}$ when both exponents $p$ and $q$ are finite.
openaire   +2 more sources

Essential norm estimates for the $\bar{\partial}$-Neumann operator on convex domains and worm domains

open access: yes, 2017
In the paper we give a lower estimate for the essential norm of the $\bar{\partial}$-Neumann operator on convex domains and worm domains of Diederich and Fornaess.Comment: fixed a mistake in Lemma 2, updated one corollary, and removed another one.
Cuckovic, Zeljko, Sahutoglu, Sonmez
core   +1 more source

The essential norm of a composition operator on Bloch spaces [PDF]

open access: yes, 1999
We express the essential norm of a composition operator on the Bloch space and the little Bloch space as the asymptotic upper bound of a quantity involving the inducing map and the Pick-Schwarz Lemma. As a consequence, we obtain a new proof of a recently
Montes Rodríguez, Alfonso
core   +2 more sources

The essential norms of composition operators [PDF]

open access: yesGlasgow Mathematical Journal, 1992
Throughout the paper n denotes a fixed positive integer unless otherwise specified. Let B = Bn denote the open unit ball of ℂn and let S = Sn denote its boundary, the unit sphere. The unique rotation-invariant probability measure on 5 will be denoted by σ = σn. For n = l, we use more customary notations D = B1, T = S1 and dσ1= dθ/2π. The Hardy space on
openaire   +1 more source

Weighted composition operators between different Fock spaces

open access: yes, 2017
We study weighted composition operators acting between Fock spaces. The following results are obtained: (1) Criteria for the boundedness and compactness; (2) Characterizations of compact differences and essential norm; (3) Complete descriptions of path ...
Khoi, Le Hai, Tien, Pham Trong
core   +1 more source

Typed Norms for Typed Logic Programs [PDF]

open access: yes, 1996
As typed logic programming becomes more mainstream, system building tools like partial deduction systems will need to be mapped from untyped languages to typed ones.
King, Andy, Martin, Jon
core   +2 more sources

Essential Norm of t-Generalized Composition Operators from F(p, q, s) to Iterated Weighted-Type Banach Space

open access: yesMathematics
In this work, we characterize the boundedness of t-generalized composition operators from F(p, q, s) spaces to iterated weighted-type Banach space. We also provide estimates of the norm and the essential norm of t-generalized composition operators from F(
Shams Alyusof, Nacir Hmidouch
doaj   +1 more source

Condition for emergence of complex eigenvalues in the Bogoliubov-de Gennes equations

open access: yes, 2008
The condition for the appearance of dynamical instability of the Bose-condensed system, characterized by the emergence of complex eigenvalues in the Bogoliubov-de Gennes equations, is studied analytically.
L. Pitaevskii   +6 more
core   +1 more source

Nutritional and Behavioral Intervention for Long‐Term Childhood Acute Leukemia Survivors With Metabolic Syndrome

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Metabolic syndrome (MetS) is a common complication in survivors of childhood acute lymphoblastic and myeloid leukemia (AL), and a major risk factor for premature cardiovascular disease, type‐2‐diabetes, and metabolic dysfunction‐associated steatotic liver disease (MASLD).
Visentin Sandrine   +10 more
wiley   +1 more source

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