A reflected forward-backward splitting method for monotone inclusions involving Lipschitzian operators

Abstract: The proximal extrapolated gradient method \cite{Malitsky18a} is an extension of the projected reflected gradient method \cite{Malitsky15}. Both methods were proposed for solving the classic variational inequalities. In this paper, we investigate the projected reflected gradient method, in the general setting, for solving monotone inclusions involving Lipschitzian operators. As a result, we obtain a simple method for finding a zero point of the sum of two monotone operators where one of them is Lipschizian. We also show that one can improve the range of the stepsize of this method for the case when the Lipschitzian operator is restricted to be cocoercive. A nice combination of this method and the forward-backward splitting was proposed. As a result, we obtain a new splitting method for finding a zero point of the sum of three operators ( maximally monotone + monotone Lipschitzian + cocoercive). Application to composite monotone inclusions are demonstrated.