Results 41 to 50 of about 3,705,692 (145)

Morality and the early medieval marketplace in the decrees of the Council of Paris, 829

Early Medieval Europe, EarlyView.
In summer 829, a group of bishops met at Paris with instructions from Emperor Louis the Pious to discuss the ailments of the Carolingian Empire. The decrees of this council include a series of chapters on economic abuses that collectively represent one of the most important sources on early medieval commercial relations.
Rory Naismith
wiley   +1 more source

Goal-oriented adaptive method for Fredholm partial integro-differential equations

Ain Shams Engineering Journal, 2023
In this article, a goal-oriented adaptive scheme is proposed for Fredholm partial integro-differential equations (FPIDEs). The aim of this work is to obtain higher accuracy approximations for the unknown function and its derivative at a given fixed point.
M. Sameeh, A. Elsaid, M. El-Agamy
doaj   +1 more source

Reinforcement Learning for Jump‐Diffusions, With Financial Applications

Mathematical Finance, EarlyView.
ABSTRACT We study continuous‐time reinforcement learning (RL) for stochastic control in which system dynamics are governed by jump‐diffusion processes. We formulate an entropy‐regularized exploratory control problem with stochastic policies to capture the exploration–exploitation balance essential for RL.
Xuefeng Gao, Lingfei Li, Xun Yu Zhou
wiley   +1 more source

Existence results for abstract partial neutral integro-differential equation with unbounded delay

Electronic Journal of Qualitative Theory of Differential Equations, 2009
In this paper we study the existence and regularity of mild solutions for a class of abstract partial neutral integro-differential equations with unbounded delay.
Eduardo Hernandez, H. R. Henriquez, José Paulo Carvalho dos Santos   +2 more
doaj   +1 more source

A Stable Formulation for Wave‐Induced Fracture in Peridynamics

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The bond‐associated quadrature point formulation is a very accurate peridynamic formulation for elasticity, but modeling fracture by the traditional deletion of bonds can trigger severe numerical instabilities. These instabilities are most pronounced for wave‐induced fracture, where stress waves continue to propagate through already damaged ...
Kai Partmann, Manuel Dienst, Christian Wieners, Kerstin Weinberg   +3 more
wiley   +1 more source

Fuzzy Solutions of Fuzzy Fractional Parabolic Integro Differential Equations

Universal Journal of Mathematics and Applications
This work primarily investigates the numerical solution of fuzzy fractional parabolic integro-differential equations of the Volterra type with the time derivative defined in the Caputo sense using the fuzzy Adomian decomposition method.
Deepak Pachpatte, Nagwa Saeed
doaj   +1 more source

Initial value problems for first order impulsive integro-differential equations of Volterra type in Banach spaces

Journal of Function Spaces and Applications, 2007
In this paper, we use a new method and combining the partial ordering method to study the existence of the solutions for the first order nonlinear impulsive integro-differential equations of Volterra type on finite interval in Banach spaces and for the ...
Jiang Zhu, Yajuan Yu, Vasile Postolica
doaj   +1 more source

Computer simulation of oscillatory processes of viscoelastic elements of thin-walled structures in a gas flow [PDF]

E3S Web of Conferences, 2019
Results of numerical investigation of dynamic behavior of deformed wing aircraft in a gas flow are presented in the paper. Vibrations with respect to deflections are described by a system of integro-differential equations in partial derivatives.
Khudayarov Bakhtiyar, Turaev Fozilzhon, Kucharov Olimzhon   +2 more
doaj   +1 more source

A Generalized Operational Method for Solving Integro-Partial Differential Equations Based on Jacobi Polynomials

Hacettepe Journal of Mathematics and Statistics, 2016
Summary: In this paper, a numerical method is developed for solving linear and nonlinear integro-partial differential equations in terms of the two variables Jacobi polynomials. First, some properties of these polynomials and several theorems are presented then a generalized approach implementing a collocation method in combination with two dimensional
BORHANİFAR, Abdollah, SADRİ, Khadijeh
openaire   +4 more sources

Partial Observation of Linear Systems With the Mori–Zwanzig Formalism

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The Mori–Zwanzig (MZ) formalism provides a systematic framework for deriving reduced‐order model of dynamical systems when only part of the state is observed, but its practical use is often limited by the complexity of the resulting computations.
Fan Wang, Peter Benner, Jan Heiland
wiley   +1 more source