Winnifried Wollner
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An augmented-Lagrangian method for the phase-field approach for pressurized fractures
MF Wheeler, T Wick, W Wollner
Computer Methods in Applied Mechanics and Engineering 271, 69-85, 2014
Adaptive finite elements for elliptic optimization problems with control constraints
B Vexler, W Wollner
SIAM Journal on Control and Optimization 47 (1), 509-534, 2008
A posteriori error estimates for a finite element discretization of interior point methods for an elliptic optimization problem with state constraints
W Wollner
Computational Optimization and Applications 47 (1), 133-159, 2010
Adaptive finite element solution of eigenvalue problems: balancing of discretization and iteration error
R Rannacher, A Westenberger, W Wollner
Journal of Numerical Mathematics 18 (4), 303-327, 2010
The length of the primal-dual path in Moreau--Yosida-based path-following methods for state constrained optimal control
M Hintermüller, A Schiela, W Wollner
SIAM Journal on Optimization 24 (1), 108-126, 2014
DOpElib: Differential equations and optimization environment; A goal oriented software library for solving PDEs and optimization problems with PDEs
C Goll, T Wick, W Wollner
Archive of Numerical Software 5 (2), 2017
Finite-rank ADI iteration for operator Lyapunov equations
MR Opmeer, T Reis, W Wollner
SIAM Journal on control and optimization, 2013
On the pressure approximation in nonstationary incompressible flow simulations on dynamically varying spatial meshes
M Besier, W Wollner
International journal for numerical methods in fluids 69 (6), 1045-1064, 2012
Barrier methods for optimal control problems with convex nonlinear gradient state constraints
A Schiela, W Wollner
SIAM Journal on Optimization 21 (1), 269-286, 2011
Adaptive optimal control of the obstacle problem
C Meyer, A Rademacher, W Wollner
SIAM Journal on Scientific Computing 37 (2), A918-A945, 2015
A priori error estimates for optimal control problems with pointwise constraints on the gradient of the state
C Ortner, W Wollner
Numerische Mathematik 118 (3), 587-600, 2011
The damped Crank–Nicolson time-marching scheme for the adaptive solution of the Black–Scholes equation
C Goll, R Rannacher, W Wollner
Journal of Computational Finance 18 (4), 1-37, 2015
A posteriori error estimation in PDE-constrained optimization with pointwise inequality constraints
R Rannacher, B Vexler, W Wollner
Constrained optimization and optimal control for partial differential …, 2012
On the differentiability of fluid–structure interaction problems with respect to the problem data
T Wick, W Wollner
Journal of Mathematical Fluid Mechanics 21 (3), 34, 2019
Optimal L2 velocity error estimate for a modified pressure-robust Crouzeix–Raviart Stokes element
A Linke, C Merdon, W Wollner
IMA Journal of Numerical Analysis 37 (1), 354-374, 2017
Adaptive methods for PDE-based optimal control with pointwise inequality constraints
W Wollner
An optimal control problem governed by a regularized phase-field fracture propagation model
I Neitzel, T Wick, W Wollner
SIAM Journal on Control and Optimization 55 (4), 2271-2288, 2017
Optimal control of elliptic equations with pointwise constraints on the gradient of the state in nonsmooth polygonal domains
W Wollner
SIAM Journal on Control and Optimization 50 (4), 2117-2129, 2012
A phase-field model for fractures in nearly incompressible solids
K Mang, T Wick, W Wollner
Computational Mechanics 65 (1), 61-78, 2020
A priori error estimates for the finite element discretization of optimal distributed control problems governed by the biharmonic operator
S Frei, R Rannacher, W Wollner
Calcolo 50 (3), 165-193, 2013
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