In analysis of iterative methods, is it possible that we have to use two time-lagged version of the time-varying system to analyze its convergence? (that is, we construct the evolution of x^k, x^(k-1), x^(k-2)). All the methods we saw just use one time-lagged (e.g. analysis of heavy ball method)
2026-03-30 13:34:36.1774877676
Analysis of iterative optimization methods using lyapunov analysis
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Yes. See, e.g., recent work by Lessard et. al