(0-\gamma)\beta\bigl\langle A_{0}\bigl(x_{0}^{k}-x_{0}^{k+0} \bigr),A_{0}x_{0}^{k}+A_{0}x_{0}^{k}-b \bigr\rangle +\bigl\Vert x_{0}^{k+0}-x_{0}^{k} \bigr\Vert _{G_{0}}^{0} \\ &\qquad{}+\bigl\langle x_{0}^{k}-x_{0}^{k+0}, G_{0}\bigl(x_{0}^{k}-x_{0}^{k-0} \bigr)\bigr\rangle . \end{aligned}$$ \end{document}$$ Then, substituting ([00](#Equ00){ref-type=""}) into ([0