On the convergence of the proximal point algorithm for convex minimization
SIAM Journal on Control and Optimization
Mathematics of Operations Research
Mathematics of Operations Research
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We show that the hybrid steps on the hybrid proximal point methods, allowing for constant relative errors, are necessary in order to ensure boundedness of the iterates, even in the optimization case. Moreover, we show that such conditions do not imply that the sequence of errors becomes summable ''a posteriori''.