Automatic soft landing is modeled by a differential equation with state-dependent delay. It is shown that in the model soft landing occurs for an open set of initial data, which is determined by means of a smooth invariant manifold.
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Walther, HO. On a Model for Soft Landing with State-Dependent Delay. J Dyn Diff Equat 19, 593–622 (2007). https://doi.org/10.1007/s10884-006-9064-8
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DOI: https://doi.org/10.1007/s10884-006-9064-8