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We study null geodesic congruences (NGCs) in the presence of spacetime torsion, recovering and extending results in the literature.
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R. M. Wald, General relativity · 2010
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S. Speziale, Bi-metric theory of gravity from the non-chiral Plebanski action
2010
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S. Akhshabi, Light propagation and optical scalars in torsion theories of gravity
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2017
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T. De Lorenzo, E. De Paoli and S. Speziale, Spacetime Thermodynamics with Contorsion
2018
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P. B. Yasskin and S. J. Stoeger, William R., Propagation Equations for Test Bodies With Spin and Rotation in Theories of Gravity With Torsion
2081
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