Results 21 to 30 of about 203 (42)

A first order system least squares method for the Helmholtz equation [PDF]

open access: yes, 2015
We present a first order system least squares (FOSLS) method for the Helmholtz equation at high wave number k, which always deduces Hermitian positive definite algebraic system.
Chen, Huangxin, Qiu, Weifeng
core  

Solving 2^{nd} order parabolic system by simulations of Markov jump processes [PDF]

open access: yes, 1999
There are known methods of approximating the solution of parabolic 2^{nd} order systems by solving stochastic differential equations instead. The main idea is based on the fact that a stochastic differential equation defines a diffusion process ...
M. Rogina, N. Limić
core   +1 more source

First order least squares method with weakly imposed boundary condition for convection dominated diffusion problems

open access: yes, 2014
We present and analyze a first order least squares method for convection dominated diffusion problems, which provides robust L2 a priori error estimate for the scalar variable even if the given data f in L2 space.
Chen, Huangxin   +4 more
core   +1 more source

Matrix methods for radial Schr\"{o}dinger eigenproblems defined on a semi-infinite domain

open access: yes, 2013
In this paper, we discuss numerical approximation of the eigenvalues of the one-dimensional radial Schr\"{o}dinger equation posed on a semi-infinite interval.
Aceto, Lidia   +2 more
core  

An asynchronous leapfrog method II [PDF]

open access: yes, 2016
A second order explicit one-step numerical method for the initial value problem of the general ordinary differential equation is proposed. It is obtained by natural modifications of the well-known leapfrog method, which is a second order, two-step ...
Mutze, Ulrich
core  

New definitions of exponential, hyperbolic and trigonometric functions on time scales

open access: yes, 2010
We propose two new definitions of the exponential function on time scales. The first definition is based on the Cayley transformation while the second one is a natural extension of exact discretizations.
Cieslinski, Jan L.
core  

Some implications of a new definition of the exponential function on time scales

open access: yes, 2010
We present a new approach to exponential functions on time scales and to timescale analogues of ordinary differential equations. We describe in detail the Cayley-exponential function and associated trigonometric and hyperbolic functions. We show that the
Cieśliński, Jan L.
core  

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