Results 21 to 30 of about 76,360 (233)

On an extension of the Trotter-Kato theorem for resolvent families of operators [PDF]

open access: yesJournal of Integral Equations and Applications, 1990
The Trotter-Kato theorem on convergence and approximation of \(C_ 0\)- semigroups, proved in the context of resolvent families of operators is generalized to the Volterra equations \[ R(t)x=x+\int_ 0^ t k(t- s)AR(s)x ds, \qquad x\in D(A) \] \(R(t)\) commutes with the infinitesimal generator \(A\).
openaire   +2 more sources

The Generalization of the Decomposition of Functions by Energy Operators

open access: yes, 2014
This work starts with the introduction of a family of differential energy operators. Energy operators ($Psi_R^+$, $Psi_R^-$) were defined together with a method to decompose the wave equation in a previous work.
A.C. Bovik   +8 more
core   +1 more source

Complex and real Hermite polynomials and related quantizations

open access: yes, 2010
It is known that the anti-Wick (or standard coherent state) quantization of the complex plane produces both canonical commutation rule and quantum spectrum of the harmonic oscillator (up to the addition of a constant).
Cotfas, Nicolae   +2 more
core   +2 more sources

Anderson localization in generalized discrete time quantum walks [PDF]

open access: yes, 2017
We study Anderson localization in a generalized discrete time quantum walk - a unitary map related to a Floquet driven quantum lattice. It is controlled by a quantum coin matrix which depends on four angles with the meaning of potential and kinetic ...
Fistul, M. V.   +3 more
core   +2 more sources

A New Iterative Algorithms for Finite Family of Resolvent Operators

open access: yesIbn AL-Haitham Journal For Pure and Applied Sciences
Depending on the needs and requirements of keeping up with the scientific procession, researchers tend to find new recurrence schemes or develop previous recurrence schemes that will help researchers reach the fixed point and solution of variational inequality.
Mustafa Dawood Talak Alobadi   +1 more
openaire   +2 more sources

Solution to a parabolic differential equation in Hilbert space via Feynman formula - parts I and II

open access: yes, 2015
A parabolic partial differential equation $u'_t(t,x)=Lu(t,x)$ is considered, where $L$ is a linear second-order differential operator with time-independent coefficients, which may depend on $x$.
Remizov, Ivan D.
core   +2 more sources

Characterising Testing Preorders for Finite Probabilistic Processes [PDF]

open access: yes, 2007
In 1992 Wang & Larsen extended the may- and must preorders of De Nicola and Hennessy to processes featuring probabilistic as well as nondeterministic choice.
Andrew Pitts   +4 more
core   +9 more sources

Hille–Yosida-Type Theorem for Fractional Differential Equations with Dzhrbashyan–Nersesyan Derivative

open access: yesFractal and Fractional
It is a well-known fact that the Dzhrbashyan–Nersesyan fractional derivative includes as particular cases the fractional derivatives of Riemann–Liouville, Gerasimov–Caputo, and Hilfer.
Vladimir E. Fedorov   +4 more
doaj   +1 more source

User-centered design of a dynamic-autonomy remote interaction concept for manipulation-capable robots to assist elderly people in the home [PDF]

open access: yes, 2012
In this article, we describe the development of a human-robot interaction concept for service robots to assist elderly people in the home with physical tasks.
Arbeiter, Georg   +9 more
core   +2 more sources

Exploring Preferences for a Digital Single‐Session Intervention for Adolescent Siblings of Youth With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Adolescent siblings of children with cancer are at elevated risk for psychosocial problems. Unfortunately, various barriers such as limited family time and resources, conflicting schedules, and psychosocial staffing constraints at cancer centers hinder sibling access to support.
Christina M. Amaro   +10 more
wiley   +1 more source

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