$$\begin{array}{rcl}{J}_{\mu }& =& \pm {\left(\frac{W}{q+\gamma \left(p-f_{\mu }\right)}\right)}^{\frac{1}{2}}\\ J_{\mu +1}& =& J_{\mu }\left(\frac{\mu }{x}-f_{\mu }\right)\\ Y_{\mu }& =& \gamma J_{\mu }\\ Y_{\mu +1}& =& Y_{\mu }\left(\frac{\mu }{x}-p-\frac{q}{\gamma }\right)\end{array}$$