Results 31 to 40 of about 22,026,600 (288)

Bounded, asymptotically stable, and L^{1} solutions of Caputo fractional differential equations [PDF]

open access: yesOpuscula Mathematica, 2015
The existence of bounded solutions, asymptotically stable solutions, and \(L^1\) solutions of a Caputo fractional differential equation has been studied in this paper.
Muhammad N. Islam
doaj   +1 more source

Approximate controllability of non-instantaneous impulsive stochastic integrodifferential equations driven by Rosenblatt process via resolvent operators

open access: yesCubo, 2023
In this work, we investigate the existence of a mild solution and the approximate controllability of non-instantaneous impulsive stochastic integrodifferential equations driven by the Rosenblatt process in Hilbert space with the Hurst parameter \(\mathsf{
Essozimna Kpizim   +4 more
doaj   +1 more source

Existence of Mild Solutions for Multi-Term Time-Fractional Random Integro-Differential Equations with Random Carathéodory Conditions

open access: yesAxioms, 2021
In this paper, we investigate the existence of mild solutions to a multi-term fractional integro-differential equation with random effects. Our results are mainly relied upon stochastic analysis, Mönch’s fixed point theorem combined with a random fixed ...
Amadou Diop, Wei-Shih Du
doaj   +1 more source

Bandwidth and Resolvability in Statistical Spectral Analysis

open access: yesJournal of the Royal Statistical Society Series B: Statistical Methodology, 1959
SUMMARY The purpose of this paper is to refute Grenander’s latest objections to the authors' work on statistical spectral analysis, and to clarify the distinction between resolvability, bandwidth, and bias.
Lomnicki, Z. A., Zaremba, S. K.
openaire   +2 more sources

Approximation solvability for a system of implicit nonlinear variational inclusions with Η-monotone operators

open access: yesDemonstratio Mathematica, 2018
In this paper, we introduce and study a new system of variational inclusions which is called a system of nonlinear implicit variational inclusion problems with A-monotone and H-monotone operators in semi-inner product spaces.
Kim Jong Kyu, Bhat Muhammad Iqbal
doaj   +1 more source

(a,k)-Regularized C-Resolvent Families: Regularity and Local Properties

open access: yesAbstract and Applied Analysis, 2009
We introduce the class of (local) (a,k)-regularized C-resolvent families and discuss its basic structural properties. In particular, our analysis covers subjects like regularity, perturbations, duality, spectral properties and subordination principles ...
Marko Kostic
doaj   +1 more source

Temporally Resolved Fluctuation Analysis of Sleep ECG [PDF]

open access: yesJournal of Biological Physics, 2007
The correlation behavior in the heart beat rate significantly differs with respect to light sleep, deep sleep, and REM sleep. We investigate whether fluctuations of the heart beat rhythm may serve as a surrogate parameter for rapidly changing sleep phenomena, and if these changes are accessible by progressive beat-by-beat analysis of the sleep ...
Stefan, Telser   +6 more
openaire   +2 more sources

Resolvent-Generated Generalized Spectral Operators for Nonlinear Dynamical Systems via Koopman Semigroups

open access: yesMathematics
Spectral methods form a cornerstone of linear dynamics, where evolution is resolved into harmonic modes governed by eigenvalues and spectral measures of normal operators.
Rui A. P. Perdigão
doaj   +1 more source

Scattering properties of Sturm-Liouville equations with sign-alternating weight and transmission condition at turning point

open access: yesOpen Mathematics, 2023
In this article, we focus on the scattering analysis of Sturm-Liouville type singular operator including an impulsive condition and turning point. In the classical literature, there are plenty of papers considering the positive values of the weight ...
Çoşkun Nimet, Görgülü Merve
doaj   +1 more source

A data–driven sensibility tool for flow control based on resolvent analysis

open access: yesResults in Engineering
This study presents a novel application of data-driven resolvent analysis algorithm for flow control. The objective is to identify key coherent structures connected to regions of the flow that are highly sensitive to structural changes.
E. Lazpita   +4 more
doaj   +1 more source

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