equation icon  g = - 1 - r2E* + O(r3), (210) uu gur = - 1, (211) 2 3 * * 4 guA = --r (EA + B A) + O(r ), (212) 3 gAB = r2_O_AB - 1-r4(E*AB + B*AB) + O(r5) (213) 3