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math.NA2021★ 2 cited
On Symmetric Positive Definite Preconditioners for Multiple Saddle-Point Systems
John W. Pearson, Andreas Potschka
We consider symmetric positive definite preconditioners for multiple saddle-point systems of block tridiagonal form, which can be applied within the MINRES algorithm. We describe s…
math.NA2016
Backward step control for Hilbert space problems
Andreas Potschka
We analyze backward step control globalization for finding zeros of Gâteaux-differentiable functions that map from a Banach space to a Hilbert space. The results include global con…