Equation Icon  [ ν ∫ τ− ] ma μ = f μ + q2(δμ + uμu ) -1--Df-ext-+ 1-Rν uλ + ∇ νG (z(τ),z(τ′))dτ′ (1.40 ) ext ν ν 3m dτ 6 λ − ∞ +