Compact pseudo-Riemannian manifolds with parallel Weyl tensor

被引:15
|
作者
Derdzinski, Andrzej [1 ]
Roter, Witold [2 ]
机构
[1] Ohio State Univ, Dept Math, Columbus, OH 43210 USA
[2] Wroclaw Univ Technol, Inst Math & Comp Sci, PL-50370 Wroclaw, Poland
关键词
Parallel Weyl tensor; Conformally symmetric manifold/metric; Compact pseudo-Riemannian manifold; CONFORMALLY SYMMETRIC MANIFOLDS; AFFINE; SPACES;
D O I
10.1007/s10455-009-9173-9
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
It is shown that in every dimension n = 3j + 2, j = 1, 2, 3, . . ., there exist compact pseudo-Riemannian manifolds with parallel Weyl tensor, which are Ricci-recurrent, but neither conformally flat nor locally symmetric, and represent all indefinite metric signatures. The manifolds in question are diffeomorphic to nontrivial torus bundles over the circle. They all arise from a construction that a priori yields bundles over the circle, having as the fibre either a torus, or a 2-step nilmanifold with a complete flat torsionfree connection; our argument only realizes the torus case.
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页码:73 / 90
页数:18
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