equation icon  ab 1 d integral 4 V~ --- cdef A = V~ ------- d - gCcdefC -g dgab = 1gabC Ccdef- 2RacdeRb + 4RacR b- 2RRab - 2[]Rab + 2 \~/ a\ ~/ bR + 1gab[]R, (9) 2 cdef cde c 3 3 3 ab 1 d integral 4 V~ --- 2 B = V~ ------- d - gR -g dgab = 1gabR2 - 2RRab + 2 \~/ a\ ~/ bR - 2gab[]R, (10) 2