The formulas for boosts in the standard configuration follow most straightforwardly from taking differentials of the inverse Lorentz boost in standard configuration.[6][7] If the primed frame is travelling with speed v with Lorentz factor γ = 1 / 1 − v 2 / c 2 {\displaystyle \gamma =1/{\sqrt {1-v^{2}/c^{2}}}} in the positive x-direction relative to the unprimed frame, then the differentials are