Linear and Superlinear Convergence of a Potential Reduction Algorithm for Generalized Nash Equilibrium Problems
Keywords:
Generalized Nash equilibrium problem, potential reduction algorithm, linear conver gence, superlinear convergence.Abstract
Wepresent a detailed convergence analysis of the potential reduction algorithm for generalized Nash equilibrium problems (GNEPs), that is known to be a robust method for solving those problems. Weprove Q-linear convergence of the merit function and R-linear convergence of the distance of the iterates to the set of KKT-points of the GNEP. Furthermore, we show that the stepsize is bounded
from below, implying finite termination of the method for prescribed accuracy. Using a non-fixed linesearch parameter we prove superlinear convergence. Further, we give additional assumptions to transfer the convergence rates to an inexact potential reduction algorithm. By our analysis, we also discover indicators that could be used to estimate the active set at an accumulation point, and hence at a generalized Nash equilibrium, which might be exploited numerically.
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