Equation Icon  Γ (ξ) = M (ξ ), (68 ) aa ( ) Γ aξ(a, ξ) = F(1)(ξ ) ⋅ a ⋅⋅⋅ F(m )(ξ ) ⋅ a , (69 ) ( ) aT ⋅ S (11)(ξ ) ⋅ a ⋅⋅⋅ aT ⋅ S(1m)(ξ) ⋅ a Γ ξξ(a, ξ) = ( ..................................) . (70 ) T T a ⋅ S(m1)(ξ) ⋅ a ⋅⋅⋅ a ⋅ S(mm)(ξ) ⋅ a