Equation Icon  -- Caa(a,ξ ) = M (ξ)− 1 + M (ξ)−1 ⋅ Γ aξ(a,ξ) ⋅Γ (a,ξ)− 1 ⋅ Γ aξ(a,ξ)T ⋅ M (ξ)−1, (74 ) −1 -- −1 Caξ(a,ξ ) = − M (ξ) ⋅ Γ aξ(a,ξ) ⋅Γ (a,ξ) , (75 ) C (a,ξ ) = Γ-(a,ξ)−1. (76 ) ξξ