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A long-term numerical energy-preserving analysis of symmetric and/or symplectic extended RKN integrators for efficiently solving highly oscillatory Hamiltonian systems

期刊: BIT NUMERICAL MATHEMATICS, 2021; 61 (3)

This paper presents a long-term analysis of one-stage extended Runge-Kutta-Nystrom (ERKN) integrators for highly oscillatory Hamiltonian systems. We s......

Block boundary value methods for linear weakly singular Volterra integro-differential equations

期刊: BIT NUMERICAL MATHEMATICS, ; ()

A class of block boundary value methods (BBVMs) is constructed for linear weakly singular Volterra integro-differential equations (VIDEs). The converg......

A priori error estimates of discontinuous Galerkin methods for a quasi-variational inequality

期刊: BIT NUMERICAL MATHEMATICS, ; ()

We study a priori error estimates of discontinuous Galerkin (DG) methods for solving a quasi-variational inequality, which models a frictional contact......

Strong approximation of time-changed stochastic differential equations involving drifts with random and non-random integrators

期刊: BIT NUMERICAL MATHEMATICS, ; ()

The rates of strong convergence for various approximation schemes are investigated for a class of stochastic differential equations (SDEs) which invol......

Randomized block Krylov subspace methods for trace and log-determinant estimators

期刊: BIT NUMERICAL MATHEMATICS, ; ()

We present randomized algorithms based on block Krylov subspace methods for estimating the trace and log-determinant of Hermitian positive semi-defini......

Uniformly accurate nested Picard integrators for a system of oscillatory ordinary differential equations

期刊: BIT NUMERICAL MATHEMATICS, ; ()

A uniformly second order accurate nested Picard iterative integrator (NPI) is proposed to solve a system of oscillatory ordinary equations involving a......

A multigrid method for the ground state solution of Bose-Einstein condensates based on Newton iteration

期刊: BIT NUMERICAL MATHEMATICS, ; ()

In this paper, a new kind of multigrid method is proposed for the ground state solution of Bose-Einstein condensates based on Newton iteration scheme.......

A high-order compact finite difference method on nonuniform time meshes for variable coefficient reaction-subdiffusion problems with a weak initial singularity

期刊: BIT NUMERICAL MATHEMATICS, ; ()

A high-order compact finite difference method on nonuniform time meshes is proposed for solving a class of variable coefficient reaction-subdiffusion ......

An efficient second-order energy stable BDF scheme for the space fractional Cahn-Hilliard equation

期刊: BIT NUMERICAL MATHEMATICS, ; ()

The space fractional Cahn-Hilliard phase-field model is more adequate and accurate in the description of the formation and phase change mechanism than......

Semi-implicit Euler-Maruyama method for non-linear time-changed stochastic differential equations

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (4)

The semi-implicit Euler-Maruyama (EM) method is investigated to approximate a class of time-changed stochastic differential equations, whose drift coe......

Convergence analysis of a finite difference scheme for a two-point boundary value problem with a Riemann-Liouville-Caputo fractional derivative

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (2)

The Riemann-Liouville-Caputo (RLC) derivative is a new class of derivative that is motivated by modelling considerations; it lies between the more fam......

Nonstandard finite element de Rham complexes on cubical meshes

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (2)

Two general operations are proposed on finite element differential complexes on cubical meshes that can be used to construct and analyze sequences of ......

Variational formulation for fractional inhomogeneous boundary value problems

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (4)

The steady state fractional convection diffusion equation with inhomogeneous Dirichlet boundary is considered. By utilizing standard boundary shifting......

A geometric Gauss-Newton method for least squares inverse eigenvalue problems

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (3)

This paper is concerned with the least squares inverse eigenvalue problem of reconstructing a linear parameterized real symmetric matrix from the pres......

Mean-square convergence rates of stochastic theta methods for SDEs under a coupled monotonicity condition

期刊: BIT NUMERICAL MATHEMATICS, 2020; 60 (3)

The present article revisits the well-known stochastic theta methods (STMs) for stochastic differential equations (SDEs) with non-globally Lipschitz d......

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