Nonlinear Lagrangians of the Ricci type

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The Euler-Lagrange equations for some class of gravitational actions are calculated by means of Palatini principle. Polynomial structures with Einstein metrics appear among extremals of this variational problem.
8 pages in LaTeX, to appear in Reports on Mathematical Physics

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General Relativity and Quantum Cosmology, Mathematical Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/36547

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/9906043
 http://arxiv.org/abs/gr-qc/9906043

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arXiv