  Recently, we proposed a new approach for calculating Feynman graphs amplitude
using the Gaussian representation for propagators which was proven to be exact
in the limit of graphs having an infinite number of loops. Regge behavior was
also found in a completely new way and the leading Regge trajectory calculated.
Here we present symmetry arguments justifying the simple form used for the
polynomials in the Feynman parameters $\bar \alpha _{\ell}$, where $\bar \alpha
_{\ell}$ is the mean-value for these parameters, appearing in the amplitude for
the ladder graphs. (Taking mean-values is equivalent to the Gaussian
representation for propagators).
