Abstract
In General Relativity a gravitational field is described by a symmetric, second order tensor
on the space-time manifold R 4The tensor g is assumed to have the signature +, −, −, −; namely for all z ∈ R 4 the bilinear form g(z)[.,.] possesses one positive and three negative eigenvalues. The “pseudo-metric” induced by g is called Lorentz-metric.
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Benci, V., Fortunato, D. (1990). Periodic Trajectories for the Lorentz-Metric of a Static Gravitational Field. In: Berestycki, H., Coron, JM., Ekeland, I. (eds) Variational Methods. Progress in Nonlinear Differential Equations and Their Applications, vol 4. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4757-1080-9_29
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DOI: https://doi.org/10.1007/978-1-4757-1080-9_29
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