Notwendige Optimalitätsbedingungen und verallgemeinerte Bang-Bang-Prinzipien für nichtlineare Steuerprobleme bei parabolischen Differentialgleichungen mit Steuer- und Zustandsbeschränkungen. - Fredi Tröltzsch (1982)

Book reviews. - E. Schaich; H. Volger; Fredi Tröltzsch (Math. Methods Oper. Res., 1997)

A Linear Parabolic Boundary Control Problem with Mixed Control-State Constraint. - M. Bergounioux; Fredi Tröltzsch (Control of Distributed Parameter and Stochastic Systems, 1998)

On the Lagrange–Newton–SQP Method for the Optimal Control of Semilinear Parabolic Equations. - Fredi Tröltzsch (SIAM J. Control. Optim., 1999)

Second Order Sufficient Optimality Conditions for Some State-constrained Control Problems of Semilinear Elliptic Equations. - Eduardo Casas; Fredi Tröltzsch; Andreas Unger (SIAM J. Control. Optim., 2000)

Error estimates for linear-quadratic elliptic control problems. - Eduardo Casas; Fredi Tröltzsch (Analysis and Optimization of Differential Systems, 2002)

Error Estimates for the Numerical Approximation of a Semilinear Elliptic Control Problem. - Nadir Arada; Eduardo Casas; Fredi Tröltzsch (Comput. Optim. Appl., 2002)

On an Augmented Lagrangian SQP Method for a Class of Optimal Control Problems in Banach Spaces. - Nadir Arada; Jean-Pierre Raymond; Fredi Tröltzsch (Comput. Optim. Appl., 2002)

Second-Order Necessary and Sufficient Optimality Conditions for Optimization Problems and Applications to Control Theory. - Eduardo Casas; Fredi Tröltzsch (SIAM J. Optim., 2002)

Sufficient Second-Order Optimality Conditions for a Parabolic Optimal Control Problem with Pointwise Control-State Constraints. - Arnd Rösch; Fredi Tröltzsch (SIAM J. Control. Optim., 2003)

On convergence of a receding horizon method for parabolic boundary control. - Fredi Tröltzsch; Daniel Wachsmuth (Optim. Methods Softw., 2004)

Error Estimates for the Numerical Approximation of Boundary Semilinear Elliptic Control Problems. - Eduardo Casas; Mariano Mateos; Fredi Tröltzsch (Comput. Optim. Appl., 2005)

Regular Lagrange Multipliers for Control Problems with Mixed Pointwise Control-State Constraints. - Fredi Tröltzsch (SIAM J. Optim., 2005)

Optimal Control of PDEs with Regularized Pointwise State Constraints. - Christian Meyer 001; Arnd Rösch; Fredi Tröltzsch (Comput. Optim. Appl., 2006)

Optimal Control of a Semilinear PDE with Nonlocal Radiation Interface Conditions. - Christian Meyer 001; Peter Philip; Fredi Tröltzsch (SIAM J. Control. Optim., 2006)

Existence of Regular Lagrange Multipliers for a Nonlinear Elliptic Optimal Control Problem with Pointwise Control-State Constraints. - Arnd Rösch; Fredi Tröltzsch (SIAM J. Control. Optim., 2006)

Sufficient Second-Order Optimality Conditions for an Elliptic Optimal Control Problem with Pointwise Control-State Constraints. - Arnd Rösch; Fredi Tröltzsch (SIAM J. Optim., 2006)

On two numerical methods for state-constrained elliptic control problems. - Christian Meyer 001; Uwe Prüfert; Fredi Tröltzsch (Optim. Methods Softw., 2007)

Optimal Control of the Stationary Navier–Stokes Equations with Mixed Control-State Constraints. - Juan Carlos de los Reyes; Fredi Tröltzsch (SIAM J. Control. Optim., 2007)

On Regularity of Solutions and Lagrange Multipliers of Optimal Control Problems for Semilinear Equations with Mixed Pointwise Control-State Constraints. - Arnd Rösch; Fredi Tröltzsch (SIAM J. Control. Optim., 2007)

Editorial. - Luis Alberto Fernandez; William W. Hager; Fredi Tröltzsch (Comput. Optim. Appl., 2008)

The convergence of an interior point method for an elliptic control problem with mixed control-state constraints. - Uwe Prüfert; Fredi Tröltzsch; Martin Weiser (Comput. Optim. Appl., 2008)

Mesh-independence of semismooth Newton methods for Lavrentiev-regularized state constrained nonlinear optimal control problems. - Michael Hintermüller; Fredi Tröltzsch; Irwin Yousept (Numerische Mathematik, 2008)

Sufficient Second-Order Optimality Conditions for Semilinear Control Problems with Pointwise State Constraints. - Eduardo Casas; Juan Carlos de los Reyes; Fredi Tröltzsch (SIAM J. Optim., 2008)

On Finite Element Error Estimates for Optimal Control Problems with Elliptic PDEs. - Fredi Tröltzsch (LSSC, 2009)

Editorial. - Fredi Tröltzsch (Comput. Optim. Appl., 2009)

POD a-posteriori error estimates for linear-quadratic optimal control problems. - Fredi Tröltzsch; Stefan Volkwein (Comput. Optim. Appl., 2009)

A regularization method for the numerical solution of elliptic boundary control problems with pointwise state constraints. - Fredi Tröltzsch; Irwin Yousept (Comput. Optim. Appl., 2009)

First- and Second-Order Optimality Conditions for a Class of Optimal Control Problems with Quasilinear Elliptic Equations. - Eduardo Casas; Fredi Tröltzsch (SIAM J. Control. Optim., 2009)

A posteriori error estimation for nonlinear parabolic boundary control. - Eileen Kammann; Fredi Tröltzsch (MMAR, 2011)

Some aspects of reachability for parabolic boundary control problems with control constraints. - Vili Dhamo; Fredi Tröltzsch (Comput. Optim. Appl., 2011)

Optimal Control of Three-Dimensional State-Constrained Induction Heating Problems with Nonlocal Radiation Effects. - Pierre-Étienne Druet; Olaf Klein; Jürgen Sprekels; Fredi Tröltzsch; Irwin Yousept (SIAM J. Control. Optim., 2011)

Numerical Analysis of State-constrained Optimal Control Problems for PDEs. - Ira Neitzel; Fredi Tröltzsch (Constrained Optimization and Optimal Control for Partial Differential Equations, 2012)

A general theorem on error estimates with application to a quasilinear elliptic optimal control problem. - Eduardo Casas; Fredi Tröltzsch (Comput. Optim. Appl., 2012)

Introduction. - Fredi Tröltzsch; Arnd Rösch (Comput. Optim. Appl., 2012)

Second Order Analysis for Optimal Control Problems: Improving Results Expected From Abstract Theory. - Eduardo Casas; Fredi Tröltzsch (SIAM J. Optim., 2012)

Sparse Optimal Control of the Schlögl and FitzHugh-Nagumo Systems. - Eduardo Casas; Christopher Ryll; Fredi Tröltzsch (Comput. Methods Appl. Math., 2013)

On the optimal control of the Schlögl-model. - Rico Buchholz; Harald Engel; Eileen Kammann; Fredi Tröltzsch (Comput. Optim. Appl., 2013)

Erratum to: On the optimal control of the Schlögl-model. - Rico Buchholz; Harald Engel; Eileen Kammann; Fredi Tröltzsch (Comput. Optim. Appl., 2013)

On Two Optimal Control Problems for Magnetic Fields. - Serge Nicaise; Simon Stingelin; Fredi Tröltzsch (Comput. Methods Appl. Math., 2014)

On some optimal control problems for electrical circuits. - Kristof Altmann; Simon Stingelin; Fredi Tröltzsch (Int. J. Circuit Theory Appl., 2014)

Second-Order and Stability Analysis for State-Constrained Elliptic Optimal Control Problems with Sparse Controls. - Eduardo Casas; Fredi Tröltzsch (SIAM J. Control. Optim., 2014)

Modeling and Control of Low-Frequency Electromagnetic Fields in Multiply Connected Conductors. - Fredi Tröltzsch; Alberto Valli (System Modelling and Optimization, 2015)

Boundary feedback stabilization of the Schlögl system. - Martin Gugat; Fredi Tröltzsch (Autom., 2015)

An adaptive numerical method for semi-infinite elliptic control problems based on error estimates. - Pedro Merino 002; Ira Neitzel; Fredi Tröltzsch (Optim. Methods Softw., 2015)

Second Order and Stability Analysis for Optimal Sparse Control of the FitzHugh-Nagumo Equation. - Eduardo Casas; Christopher Ryll; Fredi Tröltzsch (SIAM J. Control. Optim., 2015)

Optimization of nonlocal time-delayed feedback controllers. - Peter Nestler; Eckehard Schöll; Fredi Tröltzsch (Comput. Optim. Appl., 2016)

Optimal control of a class of reaction-diffusion systems. - Eduardo Casas; Christopher Ryll; Fredi Tröltzsch (Comput. Optim. Appl., 2018)

Measure Control of a Semilinear Parabolic Equation with a Nonlocal Time Delay. - Eduardo Casas; Mariano Mateos; Fredi Tröltzsch (SIAM J. Control. Optim., 2018)

Input Reconstruction by Feedback Control for the Schlögl and FitzHugh-Nagumo Equations. - Vyacheslav Maksimov; Fredi Tröltzsch (Int. J. Appl. Math. Comput. Sci., 2020)

Unstructured Space-Time Finite Element Methods for Optimal Sparse Control of Parabolic Equations. - Ulrich Langer; Olaf Steinbach; Fredi Tröltzsch; Huidong Yang (CoRR, 2020)

On Optimal Control Problems with Controls Appearing Nonlinearly in an Elliptic State Equation. - Eduardo Casas; Fredi Tröltzsch (SIAM J. Control. Optim., 2020)

Space-time finite element methods for the initial temperature reconstruction. - Ulrich Langer; Olaf Steinbach; Fredi Tröltzsch; Huidong Yang (CoRR, 2021)

Space-Time Finite Element Discretization of Parabolic Optimal Control Problems with Energy Regularization. - Ulrich Langer; Olaf Steinbach; Fredi Tröltzsch; Huidong Yang (SIAM J. Numer. Anal., 2021)

Unstructured Space-Time Finite Element Methods for Optimal Control of Parabolic Equations. - Ulrich Langer; Olaf Steinbach; Fredi Tröltzsch; Huidong Yang (SIAM J. Sci. Comput., 2021)