Affine hypersurfaces with parallel difference tensor relative to affine α-connection
Affine hypersurfaces with parallel difference tensor relative to affine α-connection
复制标题
具有相对于仿射 α 连接的平行差张量的仿射超曲面
DOI:
10.1016/j.geomphys.2014.07.018
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发表时间:
2014-12
影响因子:
1.5
通讯作者:
Li Cece
中科院分区:
文献类型:
--
作者:
Li Cece
Li and Zhang (2014) studied affine hypersurfaces of R n+ 1 with parallel difference tensor relative to the affine α-connection∇(α), and characterized the generalized Cayley hypersurfaces by K n− 1≠ 0 and∇(α) K= 0 for some nonzero constant α, where the affine α-connection∇(α) of information geometry was introduced on affine hypersurface. In this paper, by a slightly different method we continue to study affine hypersurfaces with∇(α) K= 0, if α= 0 we further assume that the Pick invariant vanishes and affine metric is of constant sectional curvature. It is proved that they are either hyperquadrics or improper affine hypersphere with flat indefinite affine metric, the latter can be locally given as a graph of a polynomial of at most degree n+ 1 with constant Hessian determinant. In particular, if the affine metric is definite, Lorentzian, or its negative index is 2, we complete the classification of such hypersurfaces.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
10.1134/s0081543806020180
发表时间:
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影响因子:
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