Buscar
Mostrando ítems 1-10 de 226
A THEORY OF SECANT PRECONDITIONERS
(Amer Mathematical SocProvidence, 1993)
Quasi-greedy bases for sequences with gaps
(Pergamon-Elsevier Science Ltd, 2021-07)
In this paper, we establish new results in the theory started by T. Oikhberg in Oikhberg (2018) where the author joins greedy approximation theory with the use of sequences with gaps. Concretely, we study and provide some ...
Quasi-optimal convergence rate of an AFEM for quasi-linear problems of monotone type
(Global Science Press, 2012-05)
We prove the quasi-optimal convergence of a standard adaptive finite element method (AFEM) for a class of nonlinear elliptic second-order equations of monotone type. The adaptive algorithm is based on residual-type a ...
The concept of quasi-integrability for modified non-linear Schrodinger models
(SPRINGERNEW YORK, 2012)
We consider modifications of the nonlinear Schrodinger model (NLS) to look at the recently introduced concept of quasi-integrability. We show that such models possess an in finite number of quasi-conserved charges which ...
Spectral gradient methods for linearly constrained optimization
(Springer/plenum PublishersNew YorkEUA, 2005)
Quasi-exactly-solvable confining solutions for spin-1 and spin-0 bosons in (1+1)-dimensions with a scalar linear potential
(Elsevier B.V., 2014-12-01)
We point out a misleading treatment in the recent literature regarding confining solutions for a scalar potential in the context of the Duffin-Kemmer-Petiau theory. We further present the proper bound-state solutions in ...
Experimental results on the nonlinear H(infinity) control via quasi-LPV representation and game theory for wheeled mobile robots
(CAMBRIDGE UNIV PRESS, 2009)
In this paper, nonlinear dynamic equations of a wheeled mobile robot are described in the state-space form where the parameters are part of the state (angular velocities of the wheels). This representation, known as ...
Convergence of an adaptive Kačanov FEM for quasi-linear problems
(Elsevier Science, 2011-04)
We design an adaptive finite element method to approximate the solutions of quasi-linear elliptic problems. The algorithm is based on a Kačanov iteration and a mesh adaptation step is performed after each linear solve. The ...
Stochastic electron acceleration by temperature anisotropy instabilities under solar flare plasma conditions
(IOP Publishing, 2022)
Using 2D particle-in-cell plasma simulations, we study electron acceleration by temperature anisotropy instabilities, assuming conditions typical of above-the-loop-top sources in solar flares. We focus on the long-term ...