Spherically Symmetric Geometries in f(T)‎ and f(R)‎ Gravitational Theories

الملخص EN

Using the well know relation between Ricci scalar, R, and torsion scalar, T, that is, R=-T-2∇αTα, we show that, for any spherically symmetric spacetime whose (i) scalar torsion vanishing, that is, T=TμναSαμν=0 or (ii) total derivative term, that is, ∇αTα with Tα is the contraction of the torsion, vanishing, or (iii) the combination of scalar torsion and total derivative term vanishing, could be solution for f(T) and f(R) gravitational theories.