77 citations · 625 across the 37 of their papers we have counts for
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math.OC2015★ 10 cited
Stability of saddle points via explicit coderivatives of pointwise subdifferentials
Christian Clason, Tuomo Valkonen
We derive stability criteria for saddle points of a class of nonsmooth optimization problems in Hilbert spaces arising in PDE-constrained optimization, using metric regularity of i…
math.NA2015★ 12 cited
Functional error estimators for the adaptive discretization of inverse problems
Christian Clason, Barbara Kaltenbacher, Daniel Wachsmuth
So-called functional error estimators provide a valuable tool for reliably estimating the discretization error for a sum of two convex functions. We apply this concept to Tikhonov…