Equation Icon  /\ab = - hmn@2 hab + @ han@ hbm + 1-gabg @ hmt@ hnc mn m n 2 mn c t - gamg @ hbt@ hnc- gbmg @ hat@ hnc + g gct@ ham@ hbn nt c m ( nt c m mn) c t + 1(2gamgbn - gabgmn) g g - --1--g g @ hcp@ hte. (140) 4 ct ep d- 1 te cp m n