EN
We prove the existence of a sequence $(x_k)$ satisfying $0 ∈ f(x_k) +∑_{i=1}^M a_i ∇ f(x_k+β_i(x_{k+1}-x_k))(x_{k+1}-x_k)+F(x_{k+1})$, where f is a function whose second order Fréchet derivative ∇²f satifies a center-Hölder condition and F is a set-valued map from a Banach space X to the subsets of a Banach space Y. We show that the convergence of this method is superquadratic.