-\begin{theorem}[Soundness wrt universal convergence property]\label{Theo:sound}
- Let $\phi$ be a DDN model and $\psi$ be its translation. If $\psi$ verifies
- the LTL property (\ref{eq:ltl:conv}) under weak fairness property, then
- iterations of $\phi$ are universally convergent.
-\end{theorem}