Degree of mobility for metrics of Lorentzian signature and parallel (0,2)‐tensor fields on cone manifolds
Degree of mobility for metrics of Lorentzian signature and parallel (0,2)‐tensor fields on cone manifolds
复制标题
洛伦兹签名和锥流形上平行 (0,2) 张量场度量的迁移率
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
V. Matveev
中科院分区:
文献类型:
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作者:
A. Fedorova;V. Matveev
Degree of mobility of a (pseudo‐Riemannian) metric is the dimension of the space of metrics geodesically equivalent to it. We describe all possible values of the degree of mobility on a simply connected n‐dimensional manifold of Lorentzian signature. As an application, we calculate all possible differences between the dimension of the projective and the isometry groups. One of the main new technical results in the proof is the description of all parallel symmetric (0, 2)‐tensor fields on cone manifolds of signature (n−1, 2).