Equation Icon  m- ˆ(1,0) 5m-- ˆ(1,0) ∂tδm = 3 ∂tA + 6 ∂tK , (22.39 ) ∂ S = 0, (22.40 ) t a (1) (1,1) (1,0) ∂2tMa + ℰabM b = − aa + 12Aˆa − ∂t ˆCa − 1m-Siℬia. (22.41 )