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hypersurfaces of type (A) — 2 results found.

      
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Nonnegatively Curved Geodesic Spheres in a Complex Hyperbolic Space
C. R. Math. Rep. Acad. Sci. Canada Vol. 35 (3) 2013, pp. 114–120
Sadahiro Maeda (Received: 2013/05/01, Revised: 2013/09/15)

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We characterize geodesic spheres with sufficiently small radii in a complex hyperbolic space by using their geometric properties. These geodesic spheres are the only examples of hypersurfaces of type (A) having nonnegative sectional curvature in this ambient space.

Nous caractérisons les sphères géodésiques de rayon suffisamment petit dans un espace hyperbolique complexe en utilisant leurs propriétés géométriques. Ces sphères géodésiques sont les seuls exemples d’hypersurfaces de type (A) qui ont courbure non-negative dans cet espace ambiant.

A Congruence Theorem of Geodesies on Some Naturally Reductive Riemannian Homogeneous Manifolds
C. R. Math. Rep. Acad. Sci. Canada Vol. 26 (1) 2004, pp. 11–17
T. Adachi / S. Ma (Received: 2003/06/03)

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No abstract available but the full text is online at the title link above.

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algebraic number theory approximation property automorphisms Bessel functions Boson-fermion correspondence C*-algebra Carmichael number center problem Chebyshev transform classification Classification of simple C*-algebras composition operators continued fractions Cuntz Semigroup elliptic curves fixed point Fourier transform function fields. functoriality general relativity generic property ideals indefinite inner product inductive limits of sub-homogeneous C*- algebras Irrational rotation algebra J-Hermitian matrix K-theory Kahler manifolds L-functions maximal ideal space nonexpansive mapping numerical range orthogonal polynomials Predual space prime number property SP Renormalization rotation algebras Salem number semi-reciprocal polynomials tracially approximate splitting interval algebras unbounded traces uniqueness Weak Markov set Whitney problems

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