|..}}\, - \Delta_b^{\scsc\#} \left\{\left[ \frac{\partial L(..)}{\partial \rho_b^{\nu ..}}\right]_{|..}\right\} - \partial_t \left\{\left[ \frac{\partial L(..)}{\partial \rho_0^{\nu ..}}\right]_{|..}\right\} = 0\vspace*{0.0cm}\,, \eqno{\rm (00