Abstract
Suppose S is a surface in R 3 diffeomorphic to the standard sphere S 2 by a smooth diffeomorphism W: R3-->R 3 of class C 4, and let HER. In this paper we give a sufficient condition for the existence of an unstable disc-type surface of constant mean curvature H with boundary on S and intersecting S orthogonally along its boundary. In isothermal coordinates such a surface may be parametrized by a map XE C2(B; R3)N cl(/~; R 3) of the unit disc

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