Abstract
Willmore immersions of an orientable surface X in the n-dimensionalsphere appear as the extremal points of a conformally invariant variational problem in the space of all immersions f: X → S n.
In this paper we will study Willmore immersions of the differentiable two-sphere in S 4, using the method of moving frames and Cartan's conformal structures.
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The work on this paper was partially supported by a Fellowship of the Consiglio Nazionale delle Ricerche.
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Musso, E. Willmore surfaces in the four-sphere. Ann Glob Anal Geom 8, 21–41 (1990). https://doi.org/10.1007/BF00055016
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DOI: https://doi.org/10.1007/BF00055016