Equation Icon  [ ā„2 ]−1 f00 = − κ (a) − ---D2 (251 ) [ 2m ] 0j ā„2 −1 ∇jšœƒ0 f = − κ (a) − ---D2 ----- (252 ) [ 2m m] i0 ∇i šœƒ0 ā„2 −1 f = − -m--- κ (a) − 2m-D2 (253 ) [ ]−1 ij ncδij ∇i-šœƒ0 ā„2-- ∇jšœƒ0- f = m − m κ (a) − 2m D2 m . (254 )