Results 31 to 40 of about 230,291 (288)

Discover governing differential equations from evolving systems

open access: yesPhysical Review Research, 2023
Discovering the governing equations of evolving systems from available observations is essential and challenging. In this paper, we consider a different scenario: discovering governing equations from streaming data.
Yuanyuan Li, Kai Wu, Jing Liu
doaj   +1 more source

MODIFICATION OF THE PARAMETRIZATION METHOD FOR SOLVING A BOUNDARY VALUE PROBLEM FOR LOADED DIFFERENTIAL EPCAG E. Bakirova

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In this paper, modification of Dzhumabaev parameterization method is developed to a boundary value problem for systems of loaded differential equations with piecewise constant argument of generalized type (EPCAG).
E. Bakirova   +2 more
doaj   +1 more source

Linear boundary value problems for systems of ordinary differential equations on noncompact intervals [PDF]

open access: yesAnnali di Matematica Pura ed Applicata, 1980
In guesta nota si esaminano la completa continuità e il rango dell'operatore integrale associate al sistema x − A(t)x=f(t, x Tx=r al variare del tipo di stabilità della parte lineare.
CECCHI, MARIELLA   +2 more
openaire   +1 more source

Multigrid Waveform Relaxation on Spatial Finite Element Meshes: The Discrete-Time Case [PDF]

open access: yes, 1996
The efficiency of numerically solving time-dependent partial differential equations on parallel computers can be greatly improved by computing the solution on many time levels simultaneously.
Janssen, Jan, Vandewalle, Stefan
core   +2 more sources

A Liouville’s Formula for Systems with Reflection

open access: yesMathematics, 2021
In this work, we derived an Abel–Jacobi–Liouville identity for the case of two-dimensional linear systems of ODEs (ordinary differential equations) with reflection.
Santiago Codesido, F. Adrián F. Tojo
doaj   +1 more source

On the solution of some simple fractional differential equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1990
The differintegration or fractional derivative of complex order ν, is a generalization of the ordinary concept of derivative of order n, from positive integer ν=n to complex values of ν, including also, for ν=−n a negative integer, the ordinary n-th ...
L. M. B. C. Campos
doaj   +1 more source

Double power series method for approximating cosmological perturbations [PDF]

open access: yes, 2017
We introduce a double power series method for finding approximate analytical solutions for systems of differential equations commonly found in cosmological perturbation theory.
Malik, Karim A., Wren, Andrew J.
core   +2 more sources

Boundary Value Problems for Delay Differential Systems

open access: yesAdvances in Difference Equations, 2010
Conditions are derived of the existence of solutions of linear Fredholm's boundary-value problems for systems of ordinary differential equations with constant coefficients and a single delay, assuming that these solutions satisfy the initial and ...
Khusainov D   +3 more
doaj   +2 more sources

Boundedness and stability in nonlinear systems of differential equations using a modified variation of parameters formula

open access: yesCubo, 2023
In this research we introduce a new variation of parameters for systems of linear and nonlinear ordinary differential equations. We use known mathematical methods and techniques including Gronwall’s inequality and fixed point theory to obtain boundedness
Youssef N. Raffoul
doaj   +1 more source

Constructive factorization of LPDO in two variables

open access: yes, 2005
We study conditions under which a partial differential operator of arbitrary order $n$ in two variables or ordinary linear differential operator admits a factorization with a first-order factor on the left.
A. Loewy   +8 more
core   +1 more source

Home - About - Disclaimer - Privacy