Abstract
The cost of solving an initial value problem for ordinary differential equations to accuracy 2 is polynomial in ln ε. Adaptive step-size control is never theoretically more costly than fixed step-size control, and can be an unbounded factor less costly. These results contradict the standard theory, but are based on more realistic assumptions.
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Corless, R.M. A New View of the Computational Complexity of IVP for ODE. Numerical Algorithms 31, 115–124 (2002). https://doi.org/10.1023/A:1021108323034
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DOI: https://doi.org/10.1023/A:1021108323034