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Journal Articles SIAM Journal on Numerical Analysis Year : 2019

Highly-oscillatory problems with time-dependent vanishing frequency

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In the analysis of highly-oscillatory evolution problems, it is commonly assumed that a single frequency is present and that it is either constant or, at least, bounded from below by a strictly positive constant uniformly in time. Allowing for the possibility that the frequency actually depends on time and vanishes at some instants introduces additional difficulties from both the asymptotic analysis and numerical simulation points of view. This work is a first step towards the resolution of these difficulties. In particular, we show that it is still possible in this situation to infer the asymptotic behaviour of the solution at the price of more intricate computations and we derive a second order uniformly accurate numerical method.
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Dates and versions

hal-01845614 , version 1 (20-07-2018)
hal-01845614 , version 2 (05-03-2019)



Philippe Chartier, Mohammed Lemou, Florian Méhats, Gilles Vilmart. Highly-oscillatory problems with time-dependent vanishing frequency. SIAM Journal on Numerical Analysis, 2019, 57 (2), pp.925-944. ⟨10.1137/18M1203456⟩. ⟨hal-01845614v2⟩
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