Results 21 to 30 of about 926,088 (241)

Characterizations of derivations [PDF]

open access: yes, 2019
The main purpose of this work is to characterize derivations through functional equations. This work consists of five chapters. In the first one, we summarize the most important notions and results from the theory of functional equations. In Chapter 2 we
Gselmann, Eszter
core   +2 more sources

Weak Solutions of a Coupled System of Urysohn-Stieltjes Functional (Delayed) Integral Equations

open access: yesComplexity, 2018
We study the existence of weak solutions for the coupled system of functional integral equations of Urysohn-Stieltjes type in the reflexive Banach space E.
A. M. A. El-Sayed, M. M. A. Al-Fadel
doaj   +1 more source

On the Asymptotic Equivalence of Ordinary and Functional Stochastic Differential Equations

open access: yesJournal of Optimization, Differential Equations and Their Applications, 2023
This paper studies the asymptotic behavior of solutions of linear stochastic functional-differential equations. This behavior is investigated using the method of asymptotic equivalence, according to which an ordinary system of linear differential ...
Olexandr M. Stanzhytskyi   +2 more
doaj   +1 more source

Mathematical analysis of a one-dimensional model for an aging fluid

open access: yes, 2012
We study mathematically a system of partial differential equations arising in the modelling of an aging fluid, a particular class of non Newtonian fluids.
Benoit, David   +3 more
core   +3 more sources

A Posteriori Error Analysis for the Optimal Control of Magneto-Static Fields [PDF]

open access: yes, 2016
This paper is concerned with the analysis and numerical analysis for the optimal control of first-order magneto-static equations. Necessary and sufficient optimality conditions are established through a rigorous Hilbert space approach. Then, on the basis
Pauly, Dirk, Yousept, Irwin
core   +2 more sources

Affine Volterra processes [PDF]

open access: yes, 2019
We introduce affine Volterra processes, defined as solutions of certain stochastic convolution equations with affine coefficients. Classical affine diffusions constitute a special case, but affine Volterra processes are neither semimartingales, nor ...
Jaber, Eduardo Abi   +2 more
core   +3 more sources

Impulsive Control Strategy for a Nonautonomous Food-Chain System with Multiple Delays

open access: yesJournal of Control Science and Engineering, 2016
A nonautonomous food-chain system with Holling II functional response is studied, in which multiple delays of digestion are also considered. By applying techniques in differential inequalities, comparison theorem in ordinary differential equations ...
Baodan Tian, Yanhong Qiu, Yucai Ding
doaj   +1 more source

Bounder solution on a strip to a system of nonlinear hyperbolic equations with mixed derivatives

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2016
The system of nonlinear hyperbolic equations with mixed derivatives is considered on the strip. Time variable of the unknown function changes on the whole axis, and the spatial variable belongs to a finite interval.
D.S. Dzhumabaev, S.M. Temesheva
doaj   +1 more source

Quasiclassical Equations of Motion for Nonlinear Brownian Systems [PDF]

open access: yes, 1993
Following the formalism of Gell-Mann and Hartle, phenomenological equations of motion are derived from the decoherence functional formalism of quantum mechanics, using a path-integral description.
A. O. Caldeira   +10 more
core   +3 more sources

The description of entire solutions for some class of complex nonlinear partial differential equation (systems) in C2 ${\mathbb{C}}^{2}$

open access: yesDemonstratio Mathematica
This article focuses on describing the entire solutions of complex nonlinear partial differential equation (systems) with two variables. Utilizing Nevanlinna theory along with the Hadamard factorization theory of meromorphic functions, we derive several ...
Chen Yu Bin, Jiao Xin, Xu Hong Yan
doaj   +1 more source

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