Results 21 to 30 of about 845 (103)

A numerical approach for investigating a special class of fractional Riccati equation

open access: yesResults in Physics, 2020
A computational scheme for solving special type of fractional Riccati equation with singularly perturbed (FRSP) is investigated. It is based on dividing the equation into algebraic equation and fractional equation.
Bothayna S. Kashkari, Muhammed I. Syam
doaj   +1 more source

Stability analysis of linear multistep methods for delay differential equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 9, Issue 3, Page 447-458, 1986., 1986
Stability properties of linear multistep methods for delay differential equations with respect to the test equation 0 < λ < 1, are investigated. It is known that the solution of this equation is bounded if and only if |a| < −b and we examine whether this property is inherited by multistep methods with Lagrange interpolation and by parametrized Adams ...
V. L. Bakke, Z. Jackiewicz
wiley   +1 more source

Analisys of Hamiltonian Boundary Value Methods (HBVMs): a class of energy-preserving Runge-Kutta methods for the numerical solution of polynomial Hamiltonian systems [PDF]

open access: yes, 2009
One main issue, when numerically integrating autonomous Hamiltonian systems, is the long-term conservation of some of its invariants, among which the Hamiltonian function itself.
Abramovitz   +21 more
core   +1 more source

Uniform stability of linear multistep methods in Galerkin procedures for parabolic problems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2, Issue 4, Page 651-667, 1979., 1979
Linear multistep methods are considered which have a stability region S and are D‐stable on the whole boundary ∂S ⊂ S of S. Error estimates are derived which hold uniformly for the class of initial value problems Y′ = AY + B(t), t > 0, Y(0) = Y0 with normal matrix A satisfying the spectral condition Sp(ΔtA) ⊂ S, Δt time step, Sp(A) spectrum of A ...
Eckart Gekeler
wiley   +1 more source

Numerical comparisons among some methods for Hamiltonian problems

open access: yes, 2010
We report a few sumerical tests comparing some newly defined energy-preserving integrators and symplectic methods, using either constant and variable stepsize.Comment: 5 pages, 8 ...
Brugnano, Luigi   +2 more
core   +1 more source

Numerical treatments of nonlinear Burgers–Fisher equation via a combined approximation technique

open access: yesKuwait Journal of Science
A combined spectral matrix collocation strategy is presented to solve the time-dependent nonlinear Burgers–Fisher equation pertaining to various important physical mechanisms such as advection, diffusion, and logistic reaction.
Mohammad Izadi, Hari Mohan Srivastava
doaj   +1 more source

Enhanced HBVMs for the numerical solution of Hamiltonian problems with multiple invariants

open access: yes, 2013
Recently, the class of energy-conserving Runge-Kutta methods named Hamiltonian Boundary Value Methods (HBVMs), has been proposed for the efficient solution of Hamiltonian problems, as well as for other types of conservative problems.
Brugnano, Luigi, Sun, Yajuan
core   +1 more source

Efficient implementation of geometric integrators for separable Hamiltonian problems

open access: yes, 2013
We here investigate the efficient implementation of the energy-conserving methods named Hamiltonian Boundary Value Methods (HBVMs) recently introduced for the numerical solution of Hamiltonian problems.
Brugnano, Luigi   +2 more
core   +1 more source

A reliable method based on second kind Chebyshev polynomial for the fractional model of Bloch equation

open access: yesAlexandria Engineering Journal, 2018
In this paper we present a reliable method based on second kind Chebyshev polynomial for the approximate solution of fractional Bloch equation in Nuclear Magnetic Resonance (NMR). The main advantages of the proposed method that it converts the fractional
Harendra Singh, C.S. Singh
doaj   +1 more source

Numerical solution of third order boundary value problems using one-step hybrid block method

open access: yesAin Shams Engineering Journal, 2019
Numerical hybrid block methods have been thought to be an appropriate method for solving ordinary differential equation. Therefore, this paper introduces a one-step hybrid block method of order five for directly solving third order boundary value ...
Ra’ft Abdelrahim
doaj   +1 more source

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