Flory Approach to the Enhancement Factor in Polymer Statistics

Using the new concept of survival probability we generalize the Flory approach to compute the second independent exponent in polymer statistics with excluded volume. We obtain $\gamma =3-d\nu$; and for the $\theta$ point, ${\gamma }^{\theta }=2(2-{\nu }^{\theta }d)$. These results bring to completion the mean-field theory for the exponents of polymer statistics.