equation icon  [ 1 1 ] eaa = dba +--r2ab(u)aa(u)- -r2Rba0c(u)_O_c + O(r3) eab [ 2 2 ] ( b) 1 2 1 2 b 3 a + r 1- rab_O_ aa(u) + -r aa(u) + -r Ra0b0(u)_O_ + O(r ) e0. (225) 2 2