being $t\simeq .21),$ and on the gauge and Yukawa couplings. This calculation has to be done numerically in general. However, from the dimensionality of these running parameters, they can be generically expressed at low energy in terms of their universal initial values as

$$\begin{aligned}
A_i(t)&=&a_iA_0+b_iM_0 \nonumber \\
m_i^2(t)&=&z_im_0^2+x_iA_0^2+y_iA_0M_0+w_iM_0^2 \label{obvious}\end{aligned}$$

where the coefficients depend on the various gauge and Yukawa couplings. For the simple case where the top Yukawa coupling dominates over the others, the dependence on the latter reduces to simple expressions in terms of the ratio $\rho =h_{t}^{2}(v)/h_{\mathrm{crit}}^{2}$ where $h_{\mathrm{crit}}\simeq 1.1$ is the fixed point value of the top Yukawa coupling. The results of this approximation are presented in the Appendix and are used for the sake of some qualitative understanding of the numerical results. With the recent measurements of the top quark mass, $\rho $ is bounded by $\rho \gtrsim 2/3$ (this is higher than the minimum value required to induce mediative $SU(2)\times U(1)$ breaking). As an example, we list the low energy soft parameters at the fixed point value $\rho =1.$ The coefficients are approximated to a reasonable precision.

$$\begin{aligned}
A_{\kappa }&\simeq &A_{0} \ \ \ \  
A_{\lambda } \simeq \frac{1}{2}\left( A_{0}-M_{0}\right) \ \ \ \ 
A_{t} 