A note on a priori ( mathbf {L^p} ) -error estimates for the obstacle problem. - Constantin Christof; Christian Meyer (Numerische Mathematik, 2018)

No-Gap Second-Order Conditions via a Directional Curvature Functional. - Constantin Christof; Gerd Wachsmuth (SIAM J. Optim., 2018)

Sensitivity Analysis and Optimal Control of Obstacle-Type Evolution Variational Inequalities. - Constantin Christof (SIAM J. Control. Optim., 2019)

Finite element error estimates in non-energy norms for the two-dimensional scalar Signorini problem. - Constantin Christof; Christof Haubner (Numerische Mathematik, 2020)

Gradient-Based Solution Algorithms for a Class of Bilevel Optimization and Optimal Control Problems with a Nonsmooth Lower Level. - Constantin Christof (SIAM J. Optim., 2020)

A Nonsmooth Trust-Region Method for Locally Lipschitz Functions with Application to Optimization Problems Constrained by Variational Inequalities. - Constantin Christof; Juan Carlos de los Reyes; Christian Meyer 001 (SIAM J. Optim., 2020)

On the Stability Properties and the Optimization Landscape of Training Problems with Squared Loss for Neural Networks and General Nonlinear Conic Approximation Schemes. - Constantin Christof (J. Mach. Learn. Res., 2021)

Correction to: Finite element error estimates in non-energy norms for the two-dimensional scalar Signorini problem. - Constantin Christof; Christof Haubner (Numerische Mathematik, 2021)

On the Omnipresence of Spurious Local Minima in Certain Neural Network Training Problems. - Constantin Christof; Julia Kowalczyk (CoRR, 2022)

Lipschitz Stability and Hadamard Directional Differentiability for Elliptic and Parabolic Obstacle-Type Quasi-variational Inequalities. - Constantin Christof; Gerd Wachsmuth (SIAM J. Control. Optim., 2022)

On the Identification and Optimization of Nonsmooth Superposition Operators in Semilinear Elliptic PDEs. - Constantin Christof; Julia Kowalczyk (CoRR, 2023)

Semismoothness for Solution Operators of Obstacle-Type Variational Inequalities with Applications in Optimal Control. - Constantin Christof; Gerd Wachsmuth (SIAM J. Control. Optim., 2023)

Strong Stationarity Conditions for Optimal Control Problems Governed by a Rate-Independent Evolution Variational Inequality. - Martin Brokate; Constantin Christof (SIAM J. Control. Optim., 2023)

Gas Source Localization Using Physics-Guided Neural Networks. - Victor Scott Prieto Ruiz; Patrick Hinsen; Thomas Wiedemann 002; Dmitriy Shutin; Constantin Christof (ISOEN, 2024)

A Globalized Inexact Semismooth Newton Method for Nonsmooth Fixed-point Equations involving Variational Inequalities. - Amal Alphonse; Constantin Christof; Michael Hintermüller; Ioannis P. A. Papadopoulos (CoRR, 2024)

Energy Space Newton Differentiability for Solution Maps of Unilateral and Bilateral Obstacle Problems. - Constantin Christof; Gerd Wachsmuth (SIAM J. Control. Optim., 2025)