Selection Strategies of Set-Valued Runge-Kutta Methods

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Baier, Robert:
Selection Strategies of Set-Valued Runge-Kutta Methods.
Bayreuth , 2004

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Abstract

A general framework for proving an order of convergence for set-valued Runge Kutta methods is given in the case of linear differential inclusions, if the attainable set at a given time should be approximated. The set-valued method is interpreted as a (set-valued) quadrature method with disturbed values for the fundamental solution at the nodes of the quadrature method. If the precision of the quadrature method and the order of the disturbances fit together, then an overall order of convergence could be guaranteed. The framework is applied to several Runge-Kutta methods up to order 4 with different selections strategies, i.e. piecewise constant, piecewise linear, two and more independent choices. Several numerical examples are calculated and the corresponding attainable sets are shown.