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  1. Sep 2017
    1. Theorem 1.1.LetMn1andMn2be hypersurfaces ofNn+1that are tan-gent atpand let0be a unitary vector that is normal toMn1atp. SupposethatMn1remains aboveMn2in a neighborhood ofpwith respect to0. De-note byH1r(x)andH2r(x)ther-mean curvature atx2WofMn1andMn2,respectively. Assume that, for somer,1rn, we haveH2r(x)H1r(x)in a neighborhood of zero; ifr2, assume also that2(0), the principal cur-vature vector ofM2at zero, belongs tor. ThenMn1andMn2coincide in aneighborhood ofp

      Princípio da tangência no interior, para as curvaturas médias de ordem superior.

    2. A TANGENCY PRINCIPLE AND APPLICATIONS 215Suppose thatMn1remains aboveMn2in a neighborhood ofpwith respect to0.Denote byH1r(x)andH2r(x)ther-mean curvatures atx2WofMn1andMn2,respectively. Assume that, for somer,1rn, we haveH2r(x)H1r(x)in a neighborhood of zero. Ifr2, assume also that2(0), the principalcurvature vector ofM2at zero, belongs tor. ThenMn1andMn2coincide ina neighborhood ofp.

      Princípio da tangência no bordo, para as curvaturas médias de ordem superior.