Equation Icon  ( ′ ′ det(𝒢μν + ℱ μν) = gzz det 𝒢μˆνˆ+ ℱ ˆμˆν + ∂ˆμXm ∂ˆνXn [(gmn − g′mn ) − (Bmn − B ′mn ) − (gmz − Bmz )(gnz + Bnz )∕gzz] − ∂ Xm ∂ Z ′[(g′ ′ − B ′ ′) − (g − B )∕g ] ˆμ ′ ˆν n m′z ′mz mz mz zz − ∂ˆμZ ∂ˆνX [(gz′n + B nz′) + (gnz + Bnz )∕gzz] ( 1 ) ) − ∂ˆμZ ′∂νˆZ ′ g ′z′z′ −--- . (86 ) gzz