Results 1 to 10 of about 68 (63)

Stability of Delay Hopfield Neural Networks with Generalized Riemann–Liouville Type Fractional Derivative [PDF]

open access: yesEntropy, 2023
The general delay Hopfield neural network is studied. We consider the case of time-varying delay, continuously distributed delays, time-varying coefficients, and a special type of a Riemann–Liouville fractional derivative (GRLFD) with an exponential ...
Ravi P. Agarwal, Snezhana Hristova
doaj   +2 more sources

General Fractional Integrals and Derivatives with the Sonine Kernels

open access: yesMathematics, 2021
In this paper, we address the general fractional integrals and derivatives with the Sonine kernels on the spaces of functions with an integrable singularity at the point zero.
Yuri Luchko, Luchko Yuri
exaly   +3 more sources

An equivalent formulation of Sonine condition

open access: yesApplied Mathematics Letters
Sonine kernel is characterized by the Sonine condition (denoted by SC) and is an important class of kernels in nonlocal differential equations and integral equations. This work proposes a SC with a more general form (denoted by gSC), which is more convenient than SC to accommodate complex kernels and equations.
Xiangcheng Zheng
exaly   +4 more sources

Some notes on Sonine–Gegenbauer integrals [PDF]

open access: yesIntegral Transforms and Special Functions, 2019
Grandits P.
exaly   +2 more sources

Nonexistence of Finite-Time Stable Equilibria in a Class of Nonlinear Integral Equations

open access: yesFractal and Fractional, 2023
This brief report studies conditions to ensure the nonexistence of finite-time stable equilibria in a class of systems that are described by means of nonlinear integral equations, whose kernels are part of some Sonine kernel pairs.
Aldo Jonathan Muñoz-Vázquez   +2 more
doaj   +1 more source

A Rigorous Analysis of Integro-Differential Operators with Non-Singular Kernels

open access: yesFractal and Fractional, 2023
Integro-differential operators with non-singular kernels have been much discussed among fractional calculus researchers. We present a mathematical study to clearly establish the rigorous foundations of this topic.
Arran Fernandez, Mohammed Al-Refai
doaj   +1 more source

Special Functions of Fractional Calculus in the Form of Convolution Series and Their Applications

open access: yesMathematics, 2021
In this paper, we first discuss the convolution series that are generated by Sonine kernels from a class of functions continuous on a real positive semi-axis that have an integrable singularity of power function type at point zero.
Yuri Luchko
doaj   +1 more source

Fractional Differential Equations with the General Fractional Derivatives of Arbitrary Order in the Riemann–Liouville Sense

open access: yesMathematics, 2022
In this paper, we first consider the general fractional derivatives of arbitrary order defined in the Riemann–Liouville sense. In particular, we deduce an explicit form of their null space and prove the second fundamental theorem of fractional calculus ...
Yuri Luchko
doaj   +1 more source

Homotopy operators for the variational bicomplex, representations of the Euler-Lagrange complex, and the Helmholtz-Sonin conditions [PDF]

open access: yesLobachevskii Journal of Mathematics, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Crampin, Michael, Saunders, David J
openaire   +2 more sources

The General Fractional Derivative and Related Fractional Differential Equations

open access: yesMathematics, 2020
In this survey paper, we start with a discussion of the general fractional derivative (GFD) introduced by A. Kochubei in his recent publications. In particular, a connection of this derivative to the corresponding fractional integral and the Sonine ...
Yuri Luchko, Masahiro Yamamoto
doaj   +1 more source

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