Equation Icon  A B( 1 2 β β C m m (rhAB,u),r − --(rV hAB,r),r − -e DADBe + rhAC DB (U,r) 3 2r r − r-e− 2βh h U C UD + 2D U + r-h D UC 2 AC BD ,r ,r A B 2 AB,r C C CD ) +rU DC (hAB,r) + rhAD,r h (DBUC − DC UB) = 0. (27 )