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Equation Icon  ( ) Ω = Ωˆ + e+ ∧ e− ˆ∇ h + re+ ∧ ed − h ˆ∇ h + ˆ∇ ∇ˆ h + 1h ˆ∇ h − 1h ∇ˆ h , ab ab [a b] ( d [a b] d [a b] )2 a [b d] 2 b [a d] (1- ) + − b + ˆ 1 ˆ 1ˆ a b Ω+ − = 4haha − F e ∧ e + re ∧ e ∂bF − F hb + 2ha∇ [ahb] + 2∇ [ahb]e ∧ e , 2 + d [( 1ˆ ) ˆ 1 ˆ ˆ ˆ 1 ˆ ] Ω+a = r e ∧ e − 2∇d + hd (∂aF − F ha) + 2F ∇ [ahd] + ∇[cha]∇ [chd] + 2h [a∇d ]F + − ( 1 ) 1 − b( 1 ) + re ∧ e haF − ∂ˆaF − 2hb∇ˆ[bha ] + 2 e ∧ e ˆ∇ahb − 2hahb ( ) + reb ∧ ed − ∇ˆd ˆ∇ [ahb] + 12ha∇ˆ[dhb] − 12hb∇ˆ[ahd ] , ( ) Ω−a = 12e+ ∧ eb ∇ˆbha − 12hahb , (11 )