Funktiоnalization of parameter in multiparameter problems of a saddle-node bifurcations of dynamical systems

The article deals with the problem of saddle-node bifurcations in multiparameter dynamical systems. Propose new features such bifurcations, where lead to an approximate formula for the resulting decisions and the relevant parameter values. We got conditions of stability of solutions. An application to the problem of saddle-node bifurcation of the Van-der-Pol.