A classical theorem of A. D. Alexandrov characterized round spheres is extended to the complex hyperbolic space CH2 of constant holomorphic sectional curvature. A detailed description of the horospheres and equidistant hypersurfaces in CH2 determining in particular their stability, is also given.
机构:
PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT MATEMAT,BR-22453 RIO DE JANEIRO,BRAZILPONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT MATEMAT,BR-22453 RIO DE JANEIRO,BRAZIL
DEALMEIDA, SC
BRITO, FGB
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PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT MATEMAT,BR-22453 RIO DE JANEIRO,BRAZILPONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT MATEMAT,BR-22453 RIO DE JANEIRO,BRAZIL