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Research Report MRR98-040

Minimal surfaces with an elastic boundary

Felicia Bernatzki and Rugang Ye

Abstract: Let $$ D:= \{ \gamma \in C^{3} ({\Bbb R} , {\Bbb R}^{3} ) | \ \gamma (s)= \gamma(s+1), \ |\dot{\gamma}| \equiv 1 $$ $$ \gamma ([0,1]) \ is \ simple \ closed \ curve \}. $$ In this paper we show that there is $ \gamma \in D$ which minimizes the functional $$ E_{\gamma_{0}} ( \gamma ) := \int_{0}^{1} | \ddot{ \gamma} (s) - \ddot{ \gamma_{0}} (s)| ^{2}ds $$ $$ + a \ area ( area \ minimizing \ surface \ with \ boundary \ \gamma ( [0,1]) ) $$ where $ \gamma_{0} \in D$ if $ a \in (0,\infty)$ is chosen suitably.

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