Results 11 to 20 of about 111,307 (278)

Norm summability of Nörlund logarithmic means on unbounded Vilenkin groups

open access: yesAnalysis in Theory and Applications, 2008
Summary: The (Nörlund) logarithmic means of the Fourier series is: \(t_nf=\frac 1{l_n}\sum\limits^{n-1}_{k=1}\frac{S_kf}{n-k}\), where \(l_n=\sum\limits^{n-1}_{k=1}\frac 1k\). In general, the Fejér \((C, 1)\) means have better properties than the logarithmic ones.
Blahota, I., Gát, G.
openaire   +3 more sources

Norm and Essential Norm of Composition Followed by Differentiation from Logarithmic Bloch Spaces to Hμ∞

open access: yesAbstract and Applied Analysis, 2014
In this note we express the norm of composition followed by differentiation DCφ from the logarithmic Bloch and the little logarithmic Bloch spaces to the weighted space Hμ∞ on the unit disk and give an upper and a lower bound for the essential norm of ...
Shanli Ye
doaj   +1 more source

Noisy low-rank matrix completion with general sampling distribution [PDF]

open access: yes, 2014
In the present paper, we consider the problem of matrix completion with noise. Unlike previous works, we consider quite general sampling distribution and we do not need to know or to estimate the variance of the noise.
Klopp, Olga
core   +2 more sources

Energy- and Regularity-Dependent Stability Estimates for Near-Field Inverse Scattering in Multidimensions

open access: yesJournal of Mathematics, 2013
We prove new global Hölder-logarithmic stability estimates for the near-field inverse scattering problem in dimension d≥3. Our estimates are given in uniform norm for coefficient difference and related stability efficiently increases with increasing ...
M. I. Isaev
doaj   +1 more source

Stability criteria for neutral delay differential-algebraic equations with many delays

open access: yesAdvances in Difference Equations, 2019
In this paper the asymptotic stability is concerned for a class of neutral delay differential-algebraic equations (NDDAEs). We will present two criteria by evaluating a corresponding harmonic function on the boundary of a torus region.
Leping Sun
doaj   +1 more source

A Decision Support Model for Hotel Recommendation Based on the Online Consumer Reviews Using Logarithmic Spherical Hesitant Fuzzy Information

open access: yesEntropy, 2021
Spherical hesitant fuzzy sets have recently become more popular in various fields. It was proposed as a generalization of picture hesitant fuzzy sets and Pythagorean hesitant fuzzy sets in order to deal with uncertainty and fuzziness information ...
Aziz Khan   +3 more
doaj   +1 more source

Convergence and stability of the exponential Euler method for semi-linear stochastic delay differential equations

open access: yesJournal of Inequalities and Applications, 2017
The main purpose of this paper is to investigate the strong convergence and exponential stability in mean square of the exponential Euler method to semi-linear stochastic delay differential equations (SLSDDEs).
Ling Zhang
doaj   +1 more source

Norm of Logarithmic Primary of Virasoro Algebra [PDF]

open access: yesLetters in Mathematical Physics, 2011
We give an algebraic proof of the formula on the norm of logarithmic primary of Virasoro algebra, which was proposed by Al. Zamolodchikov. This formula appears in the recursion formula for the norm of Gaiotto state, which guarantees the AGT relation for the four-dimensional SU(2) pure gauge theory.
openaire   +3 more sources

Bounds on the rate of convergence for one class of inhomogeneous Markovian queueing models with possible batch arrivals and services

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2018
In this paper we present a method for the computation of convergence bounds for four classes of multiserver queueing systems, described by inhomogeneous Markov chains.
Zeifman Alexander   +5 more
doaj   +1 more source

Stability of solutions for systems of delayed parabolic equations

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2023
Background. The study is devoted to the analysis of stability in the sense Lyapunov steady state solutions for systems of linear parabolic equations with coefficients depending on time, and with delays depending on time.
Il'ya V. Boykov
doaj   +1 more source

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