Heinz H. Bauschke, J. Y. Bello Cruz, Tran T. A. Nghia, Hung M. Phan, Xianfu Wang. Optimal Rates of Linear Convergence of Relaxed Alternating Projections and Generalized Douglas-Rachford Methods for Two Subspaces. Numerical Algorithms, 73(1):33-76, 2016. [doi]
Abstract is missing.