Equation Icon  ∫ ( S = ---1-- dDx √ −-g R − 1-f (χ )∂ χA∂ μχB − V (χ) − k (χ )F I F Jμν 16 πG 2 AB μ IJ μν ) +hIJ (χ)𝜖μνρσFμIνF Jρσ , (1 )