Local Lorentz transformation and exact spherically symmetric vacuum   solutions in f(T) gravity theories
  Applying a non-diagonal spherically symmetric tetrad field having arbitrary function, $S(r)$, that is corresponding to local Lorentz transformation, to the field equations of f(T) gravity theories.   An analytic vacuum solutions with constants of integration are derived. These constants are studied by calculating the total conserved charge associated to each solution. The study has shown that the obtained solutions represent Schwarzschild-Ads spacetime. 
Gamal G. L. Nashed
physics.gen-ph