Equation Icon  ( ) ∫ τ− μ μ 2( μ μ ) -2--Df-νext- 1- ν λ 2 [μ ν] ( ′) λ′ ′ ma = fext + e δ ν + u uν 3m dτ + 3 R λu + 2e uν −∞ ∇ G +λ′ z(τ),z(τ) u dτ ,(1.33 )