Inexact projected preconditioned gradient methods with variable metrics are shown to converge exponentially in continuous time and linearly in discrete time via a new Lyapunov analysis.
Bacuta, A unified approach for Uzawa algorithms , SIAM J
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Inexact projected preconditioned gradient methods with variable metrics: a Lyapunov convergence theory (extended version)
Inexact projected preconditioned gradient methods with variable metrics are shown to converge exponentially in continuous time and linearly in discrete time via a new Lyapunov analysis.