Publications

Publications in Journals with Peer-Review (since 2024)

• P. Mehlitz. Revisiting implicit variables in mathematical optimization: simplified modeling and a numerical evidence. Computational Optimization and Applications 2026(94):1041-1084.
• I. Käming and P. Mehlitz. Approximate stationarity in disjunctive optimization: concepts, qualification conditions, and application to MPCCs. Set-Valued and Variational Analysis 2025(33):48.
• S. Dempe and P. Mehlitz. Duality-based single-level reformulations of bilevel optimization problems. Journal of Optimization Theory and Applications 2025(205):26.
• C. Kanzow, F. Krämer, P. Mehlitz, G. Wachsmuth, and F. Werner. Variational Poisson denoising via augmented Lagrangian methods. Electronic Transactions on Numerical Analysis 2025(63):33-62.
• M. Benko and P. Mehlitz. On the directional asymptotic approach in optimization theory. Mathematical Programming 2025(209):859-937.
• L. O. Jolaoso, P. Mehlitz, and A. B. Zemkoho. A fresh look at nonsmooth Levenberg-Marquardt methods with applications to bilevel optimization. Optimization 2025(74): 2745-2792.
• S. Göttlich, P. Mehlitz, and T. Schillinger. Inverse demand tracking in transportation networks. Mathematical Methods of Operations Research 2024(100):635-668.
• M. Benko and P. Mehlitz. Isolated calmness of perturbation mappings and superlinear convergence of Newton-type methods. Journal of Optimization Theory and Applications 2024(203):1587-1621.
• A. De Marchi and P. Mehlitz. Local properties and augmented Lagrangians in fully nonconvex composite optimization. Journal of Nonsmooth Analysis and Optimization 2024(5): 12235.D. Hoff and P. Mehlitz. Notes on the value function approach to multiobjective bilevel optimization. Optimization 2024(73): 3147-3183.
• P. Mehlitz. A simple proof of second-order sufficient optimality conditions in nonlinear semidefinite optimization. Optimization Letters 2024(18): 965-976.
• M. Fabian, A. Y. Kruger, and P. Mehlitz. Fuzzy multiplier, sum and intersection rules in non-Lipschitzian settings: Decoupling approach revisited. Journal of Mathematical Analysis and Applications 2024(532): 127985.

Preprints (available via arXiv)

• M. Benko und Patrick Mehlitz. On error bounds and noncritical Lagrange multipliers. submitted to Journal of Nonsmooth Analysis and Optimization. 
• F. Mefo Kue, P. Mehlitz und T. Raasch. A penalty-type method for relaxed inverse optimal control problems. submitted to Journal of Optimization Theory and Applications.
• E. G. Birgin, A. De Marchi, and P. Mehlitz. Elastically safeguarded augmented Lagrangian methods. submitted to Journal of Optimization Theory and Applications.
• T. Baake and P. Mehlitz. On directional local minimality and directional optimality conditions in nonsmooth optimization. submitted to Optimization
• P. Mehlitz and G. Wachsmuth. Uniqueness and stability of Lagrange multipliers and associated qualification conditions. submitted to SIAM Journal on Optimization.
• I. Käming and P. Mehlitz. Approximate directional stationarity and associated qualification conditions. submitted to Mathematical Programming.
• A. De Marchi, T. Hoheisel, and P. Mehlitz. Augmented Lagrangian methods for fully convex composite optimization. submitted to Mathematics of Operations Research.
• S. Dempe, M. Friedemann, F. Harder, P. Mehlitz, and G. Wachsmuth. Bilevel optimal control: theory, algorithms, and applications. chapter for anthology.

Other Publications

• P. Mehlitz, J. Morgan, C. Tammer, J. J. Ye, and A. B. Zemkoho. Editorial for the special issue to celebrate the scientific career of Stephan Dempe. Optimization 2025(74): 2677-2683

Full List of Publications

A list of all publications vy the working group leader can be found here, via Google Scholar, or via ORCID.