Results 21 to 30 of about 1,712,433 (287)

Approximation Properties of the Vector Weak Rescaled Pure Greedy Algorithm

open access: yesMathematics, 2023
We first study the error performances of the Vector Weak Rescaled Pure Greedy Algorithm for simultaneous approximation with respect to a dictionary D in a Hilbert space.
Xu Xu   +3 more
doaj   +1 more source

Weak-Polynomial Convergence on a Banach Space [PDF]

open access: yes, 1993
We show that any super-reflexive Banach space is a LAMBDA-space (i.e., the weak-polynomial convergence for sequences implies the norm convergence). We introduce the notion Of kappa-space (i.e., a Banach space where the weak-polynomial convergence for ...
Prieto Yerro, M. Ángeles   +3 more
core   +2 more sources

Weak convergence of the complex fractional Brownian motion

open access: yesAdvances in Difference Equations, 2018
In this paper, we obtain two approximations in law of the complex fractional Brownian motion by processes constructed from a Poisson process and a Lévy process, respectively.
Liheng Sang, Guangjun Shen, Qingbo Wang
doaj   +1 more source

Improving Convergence Analysis of the Newton–Kurchatov Method under Weak Conditions

open access: yesComputation, 2020
The technique of using the restricted convergence region is applied to study a semilocal convergence of the Newton−Kurchatov method. The analysis is provided under weak conditions for the derivatives and the first order divided differences ...
Ioannis K. Argyros   +2 more
doaj   +1 more source

La hipótesis de convergencia en México: un enfoque de sigma-convergencia débil

open access: yesRevista Mexicana de Economía y Finanzas Nueva Época REMEF, 2021
The Convergence Hypothesis in Mexico: A Weak Sigma-Convergence Approach  We analyze the convergence hypothesis in Mexico with the relatively novel test of -weak convergence, proposed by Kong, Phillips and Sul (2019), in the period 1940-2019 and in two ...
Domingo Rodríguez Benavides   +2 more
doaj   +1 more source

Relative entropy in diffusive relaxation [PDF]

open access: yes, 2012
We establish convergence in the diffusive limit from entropy weak solutions of the equations of compressible gas dynamics with friction to the porous media equation away from vacuum.
Tzavaras, Athanasios E.   +2 more
core   +1 more source

Optical Satellite Image Geo-Positioning with Weak Convergence Geometry

open access: yesISPRS International Journal of Geo-Information, 2018
High-resolution optical satellites are widely used in environmental monitoring. With the aim to observe the largest possible coverage, the overlapping areas and intersection angles of respective optical satellite images are usually small.
Yang Wu   +3 more
doaj   +1 more source

Lw∗wc and Rw∗wc and weak amenability of banach algebras [PDF]

open access: yesJournal of Hyperstructures, 2012
We introduce some new concepts as lef t − weak∗ − weak convergence property [Lw∗wc−property] and right−weak∗− weak convergence property [Rw∗wc−property] for Banach algebra A. Suppose that A ∗ and A ∗∗, respectively, have Rw∗wc−property and Lw∗wc−property,
K. Haghnejad Azar, Z. Ranjbar
doaj   +1 more source

Weak order in averaging principle for stochastic differential equations with jumps

open access: yesAdvances in Difference Equations, 2018
In this paper, we deal with the averaging principle for a two-time-scale system of jump-diffusion stochastic differential equations. Under suitable conditions, we expand the weak error in powers of timescale parameter.
Bengong Zhang   +3 more
doaj   +1 more source

On joint discrete universality of the Riemann zeta-function in short intervals

open access: yesMathematical Modelling and Analysis, 2023
In the paper, we prove that the set of discrete shifts of the Riemann zeta-function approximating analytic nonvanishing functions f1(s),...,fr(s) defined on  has a positive density in the interval [N,N + M] with with real algebraic numbers a1,...,ar ...
Kalyan Chakraborty   +2 more
doaj   +1 more source

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