URN to cite this document: urn:nbn:de:bvb:703epub54844
Title data
Grüne, Lars:
Persistence of attractors for onestep discretization of ordinary differential equations.
Bayreuth
,
1999


Download (191kB)

Abstract
We consider numerical onestep approximations of ordinary differential equations and present two results on the persistence of attractors appearing in the numerical system.First, we show that the upper limit of a sequence of numerical attractors for a sequence of vanishing time step is an attractor for the approximated system if and only if for all these time steps the numerical onestep schemes admit attracting sets which approximate this upper limit set and attract with a uniform rate. Second, we show that if these numerical attractors themselves attract with a uniformly rate, then they converge to some set if and only if this set is an attractor for the approximated system. In this case, we can also give an estimate for the rate of convergence depending on the rate of attraction and on the order of the numerical scheme.