Abstract
We show that if a solution of the Dirichlet problem for harmonic maps lies in a convex ball and its boundary values are contained in some smaller ball, then the whole solution itself is contained in this smaller ball.
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HAMILTON, R.: Harmonie Maps of Manifolds with Boundary. Springer Lecture Notes 471, Berlin-Heidelberg-New York 1975
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JOST, J.: Ein Existenzbeweis für harmonische Abbildungen, die ein Dirichletproblem lösen, mittels der Methode des Wärmeflusses. Man. math.34, 17–25 (1981)
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Jost, J. A maximum principle for harmonic mappings which solve a Dirichlet problem. Manuscripta Math 38, 129–130 (1982). https://doi.org/10.1007/BF01168390
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DOI: https://doi.org/10.1007/BF01168390