Results 31 to 40 of about 770,616 (284)
Norm and Numerical Radius Inequalities for Sums of Bounded Linear Operators in Hilbert Spaces [PDF]
, 2006 Some inequalities for the operator norm and numerical radius of sums of bounded linear operators in Hilbert spaces are given.
Dragomir, Sever S
core +2 more sources
On the Numerical Range and Numerical Radius of the Volterra Operator
Известия Иркутского государственного университета: Серия "Математика", 2018 In this paper, we investigated the numerical range and the numerical radius of the classical Volterra operator on the complex space $L^2[0,1]$. In particular, we determined the numerical range, the numerical radius of real and imaginary part of the ...
L. Khadkhuu, D. Tsedenbayar
doaj +1 more source
On Further Refinements of Numerical Radius Inequalities
Axioms, 2023 This paper introduces several generalized extensions of some recent numerical radius inequalities of Hilbert space operators. More preciously, these inequalities refine the recent inequalities that were proved in literature.
Ayman Hazaymeh +4 more
doaj +1 more source
On Some Numerical Radius Inequalities Involving Generalized Aluthge Transform
Journal of Function Spaces, 2022 Let S be any bounded linear operator defined on a complex Hilbert space H. In this paper, we present some numerical radius inequalities involving the generalized Aluthge transform to attain upper bounds for numerical radius.
Javariya Hyder +3 more
doaj +1 more source
New estimates for the numerical radius
Filomat, 2021 In this article, we present new inequalities for the numerical radius of the sum of two Hilbert space operators. These new inequalities will enable us to obtain many generalizations and refinements of some well known inequalities, including multiplicative behavior of the numerical radius and norm bounds. Among many other applications, it is
Moradi, Hamid Reza, Sababheh, Mohammad
openaire +3 more sources
Some refinements of numerical radius inequalities [PDF]
Ukrains’kyi Matematychnyi Zhurnal, 2020 UDC 517.5 In this paper, we give some refinements for the second inequality in where In particular, if is hyponormal by refining the Young inequality with the Kantorovich constant we show that where and . We also give a reverse for the classical numerical radius power inequality for any operator in the case when
Heydarbeygi, Z. +2 more
openaire +3 more sources
Induced wormholes due to quantum effects of spherically reduced matter in large N approximation [PDF]
, 1998 Using one-loop effective action in large N and s-wave approximation we discuss the possibility to induce primordial wormholes at the early Universe. An analytical solution is found for self-consistent primordial wormhole with constant radius.
Bousso +12 more
core +2 more sources
Structure of a Bathtub Vortex : Importance of the Bottom Boundary Layer [PDF]
, 2010 A bathtub vortex in a cylindrical tank rotating at a constant angular velocity [omega] is studied by meansof a laboratory experiment, a numerical experiment and a boundary layer theory.
A. Andersen +13 more
core +1 more source
Diagrammatic Quantum Monte Carlo for Two-Body Problem: Exciton [PDF]
, 2001 We present a novel method for precise numerical solution of the irreducible two-body problem and apply it to excitons in solids. The approach is based on the Monte Carlo simulation of the two-body Green function specified by Feynman's diagrammatic ...
A. S. Mishchenko +23 more
core +3 more sources
New Analytical Formula for Supercritical Accretion Flows [PDF]
, 2006 We examine a new family of global analytic solutions for optically thick accretion disks, which includes the supercritical accretion regime. We found that the ratio of the advection cooling rate, $Q_{\rm adv}$, to the viscous heating rate, $Q_{\rm vis}$,
Abramowicz M. A. +23 more
core +2 more sources