Picture of neon light reading 'Open'

Discover open research at Strathprints as part of International Open Access Week!

23-29 October 2017 is International Open Access Week. The Strathprints institutional repository is a digital archive of Open Access research outputs, all produced by University of Strathclyde researchers.

Explore recent world leading Open Access research content this Open Access Week from across Strathclyde's many research active faculties: Engineering, Science, Humanities, Arts & Social Sciences and Strathclyde Business School.

Explore all Strathclyde Open Access research outputs...

Stepsize selection for tolerance proportionality in explicit Runge-Kutta codes

Calvo, M.C. and Higham, D.J. and Montijano, J.M. and Rández, L. (1997) Stepsize selection for tolerance proportionality in explicit Runge-Kutta codes. Advances in Computational Mathematics, 7 (3). pp. 361-382. ISSN 1019-7168

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

The potential for adaptive explicit Runge-Kutta (ERK) codes to produce global errors that decrease linearly as a function of the error tolerance is studied. It is shown that this desirable property may not hold, in general, if the leading term of the locally computed error estimate passes through zero. However, it is also shown that certain methods are insensitive to a vanishing leading term. Moreover, a new stepchanging policy is introduced that, at negligible extra cost, ensures a robust global error behaviour. The results are supported by theoretical and numerical analysis on widely used formulas and test problems. Overall, the modified stepchanging strategy allows a strong guarantee to be attached to the complete numerical process.