Abstract
We consider the Willmore boundary value problem for surfaces of revolution over the interval [−1,1] where, as Dirichlet boundary conditions, any symmetric set of position α and angle arctanβ may be prescribed. Energy minimising solutions u α,β have been previously constructed and for fixed β∈ℝ, the limit \(\lim_{\alpha \searrow0 }u_{\alpha,\beta}(x) =\sqrt{1 - x^{2}}\) has been proved locally uniformly in (−1,1), irrespective of the boundary angle. Subject of the present note is to study the asymptotic behaviour for fixed β∈ℝ and α↘0 in a boundary layer of width kα, k>0 fixed, close to ±1. After rescaling \(x\mapsto\frac{1}{\alpha}u_{\alpha,\beta }(\alpha(x-1)+1)\) one has convergence to a suitably chosen cosh on [1−k,1].
Financial support of “Deutsche Forschungsgemeinschaft” for the project “Randwertprobleme für Willmoreflächen – Analysis, Numerik und Numerische Analysis”, (DE 611/5-2) is gratefully acknowledged.
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Acknowledgements
I am grateful to my colleague Klaus Deckelnick for raising the question and to the referee for helpful suggestions.
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Dedicated to the memory of Prof. Wolfgang Walter, who uncovered so many deep insights into Analysis
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Grunau, HC. (2012). The Asymptotic Shape of a Boundary Layer of Symmetric Willmore Surfaces of Revolution. In: Bandle, C., Gilányi, A., Losonczi, L., Plum, M. (eds) Inequalities and Applications 2010. International Series of Numerical Mathematics, vol 161. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-0249-9_2
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DOI: https://doi.org/10.1007/978-3-0348-0249-9_2
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