Prof. Dr. Ira Neitzel

E-mail: neitzel(at)
Phone: +49 228 73 3144
Room: 4.006
Location: Computing Center
Institute: Institute for Numerical Simulation
Research Areas: Research Area J
Research Area B
Birthdate: 30.Jun 1981

Academic Career

2006 - 2011

Research Associate, Institute for Mathematics, TU Berlin


Dr. rer. nat. (summa cum laude), TU Berlin

2011 - 2013

Research Associate, Chair of Mathematical Optimization, TU Munich

2013 - 2015

Research Associate, Chair of Optimal Control, TU Munich

Since 2015

Professor, Institute for Numerical Simulation, University of Bonn

Research Profile

My research is concerned with the analysis and numerical analysis of PDE-constrained optimal control problems, subject to additional constraints. Theoretical questions include the derivation of optimality conditions in function spaces, stability analysis, and regularization issues. Moreover, I am interested in error estimates for the finite element discretization, and convergence of solution algorithms. Past and present research includes the discussion of convex and nonconvex elliptic and parabolic control problems, and semi-infinite programming problems arising in PDE-constrained optimization.

Future work will focus in particular on open questions regarding the analysis and numerical analysis of nonconvex time-dependent problems regarding the development of optimality conditions and a priori as well as a posteriori discretization error estimates. A model problem to be considered is optimal control of fracture propagation.

Research Projects and Activities

Optimization Fracture Propagation Using a Phase-Field Approach,
within DFG Priority Program SPP 1962 “Nonsmooth and Complementarity-based Distributed Parameter Systems: Simulation and Hierarchical Optimization”
with Prof. W. Wollner, Darmstadt, since 2016

Contribution to Research Areas

Research Area B
Research Area J

Selected Publications

[1] Ira Neitzel, Boris Vexler
A priori error estimates for space-time finite element discretization of semilinear parabolic optimal control problems
Numer. Math. , 120: (2): 345--386
ISSN: 0029-599X
DOI: 10.1007/s00211-011-0409-9
[2] Mariano Mateos, Ira Neitzel
Dirichlet control of elliptic state constrained problems
Comput. Optim. Appl. , 63: (3): 825--853
ISSN: 0926-6003
DOI: 10.1007/s10589-015-9784-y
[3] Ira Neitzel, Thomas Wick, Winnifried Wollner
An optimal control problem governed by a regularized phase field fracture propagation model
Submitted, also available as IGDK 1754 Preprint N. 2015-12
[4] Klaus Krumbiegel, Ira Neitzel, Arnd Rösch
Sufficient optimality conditions for the Moreau-Yosida-type regularization concept applied to semilinear elliptic optimal control problems with pointwise state constraints
Ann. Acad. Rom. Sci. Ser. Math. Appl. , 2: (2): 222--246
ISSN: 2066-5997
[5] Ira Neitzel, Johannes Pfefferer, Arnd Rösch
Finite element discretization of state-constrained elliptic optimal control problems with semilinear state equation
SIAM J. Control Optim. , 53: (2): 874--904
ISSN: 0363-0129
DOI: 10.1137/140960645
[6] Ira Neitzel, Fredi Tröltzsch
On convergence of regularization methods for nonlinear parabolic optimal control problems with control and state constraints
Control Cybernet. , 37: (4): 1013--1043
ISSN: 0324-8569
[7] Ira Neitzel, Fredi Tröltzsch
On regularization methods for the numerical solution of parabolic control problems with pointwise state constraints
ESAIM Control Optim. Calc. Var. , 15: (2): 426--453
ISSN: 1292-8119
DOI: 10.1051/cocv:2008038
[8] Pedro Merino, Ira Neitzel, Fredi Tröltzsch
On linear-quadratic elliptic control problems of semi-infinite type
Appl. Anal. , 90: (6): 1047--1074
ISSN: 0003-6811
DOI: 10.1080/00036811.2010.489187
[9] Ira Neitzel, Winnifried Wollner
A priori L2-discretization error estimates for the state in elliptic optimization problems with pointwise inequality state constraints
Submitted, also available as INS Preprint No. 1606.
[10] Pedro Merino, Ira Neitzel, Fredi Tröltzsch
An adaptive numerical method for semi-infinite elliptic control problems based on error estimates
Optim. Methods Softw. , 30: (3): 492--515
ISSN: 1055-6788
DOI: 10.1080/10556788.2014.932789

Publication List



Ernst Otto Fischer Teaching Award, TU Munich


Walther von Dyck Award, TU Munich

Supervised Theses

  • Master theses: 2, currently 2
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