Author Description

Contents: Progress in Affine Differential Geometry — Problem List and Continued Bibliography (T Binder & U Simon) On the Classification of Timelike Bonnet Surfaces (W H Chen & H Z Li) Affine Hyperspheres with Constant Affine Sectional Curvature (F Dillen et al.) Geometric Properties of the Curvature Operator (P Gilkey) On a Question of S S Chern Concerning Minimal Hypersurfaces of Spheres (I Hiric( & L Verstraelen) Parallel Pure Spinors on Pseudo-Riemannian Manifolds (I Kath) Twistorial Construction of Spacelike Surfaces in Lorentzian 4-Manifolds (F Leitner) Nirenberg's Problem in 90's (L Ma) A New Proof of the Homogeneity of Isoparametric Hypersurfaces with (g, m) = (6, 1) (R Miyaoka) Harmonic Maps and Negatively Curved Homogeneous Spaces (S Nishikawa) Biharmonic Morphisms Between Riemannian Manifolds (Y L Ou) Intrinsic Properties of Real Hypersurfaces in Complex Space Forms (P J Ryan) On the Nonexistence of Stable Minimal Submanifolds in Positively Pinched Riemannian Manifolds (Y B Shen & H Q Xu) Geodesic Mappings of the Ellipsoid (K Voss) η -Invariants and the Poincaré-Hopf Index Formula (W Zhang) and other papers Readership: Researchers in differential geometry and topology.