Equation Icon  ∫ ab --1----δ- 4√--- cdef A = √ −-gδg d − gCcdefC ab = 1gabCcdefCcdef − 2RacdeRb + 4RacR b− 2-RRab 2 cde c 3 ab 2- a b 1- ab − 2□R + 3∇ ∇ R + 3 g □R, (10 ) 1 δ ∫ √--- Bab = √-------- d4 − gR2 − gδgab 1- ab 2 ab a b ab = 2g R − 2RR + 2∇ ∇ R − 2g □R, (11 )