The approximate Dirichlet Domain Decomposition method. Part I: An algebraic approach. - Gundolf Haase; Ulrich Langer; Arnd Meyer (Computing, 1991)

The approximate Dirichlet Domain Decomposition method. Part II: Applications to 2nd-order Elliptic B.V.P.s. - Gundolf Haase; Ulrich Langer; Arnd Meyer (Computing, 1991)

Symbolic Methods for the Element Preconditioning Technique. - Ulrich Langer; Stefan Reitzinger; Josef Schicho (SNSC, 2001)

Algebraic multigrid methods based on element preconditioning. - Gundolf Haase; Ulrich Langer; Stefan Reitzinger; Joachim Schöberl (Int. J. Comput. Math., 2001)

Parallel multigrid 3D Maxwell solvers. - Gundolf Haase; Michael Kuhn 009; Ulrich Langer (Parallel Comput., 2001)

Boundary Element Tearing and Interconnecting Methods. - Ulrich Langer; Olaf Steinbach (Computing, 2003)

Comparison of Geometrical and Algebraic Multigrid Preconditioners for Data-Sparse Boundary Element Matrices. - Ulrich Langer; D. Pusch (LSSC, 2005)

Numerical analysis of nonlinear multiharmonic eddy current problems. - Florian Bachinger; Ulrich Langer; Joachim Schöberl (Numerische Mathematik, 2005)

A robust PDE solver for the 3D Stokes/Navier-Stokes systems on the grid environment. - Huidong Yang; Walter Zulehner; Ulrich Langer; Markus Baumgartner (GRID, 2007)

GStokes: A Grid-enabled Solver for the 3D Stokes/Navier-Stokes System on Hybrid Meshes. - Ulrich Langer; Walter Zulehner; Huidong Yang; Markus Baumgartner (ISPDC, 2007)

Inexact Data-Sparse Boundary Element Tearing and Interconnecting Methods. - Ulrich Langer; Günther Of; Olaf Steinbach; Walter Zulehner (SIAM J. Sci. Comput., 2007)

Primal and Dual Interface Concentrated Iterative Substructuring Methods. - Sven Beuchler; Tino Eibner; Ulrich Langer (SIAM J. Numer. Anal., 2008)

Boundary Element Simulation of Linear Water Waves in a Model Basin. - Clemens Hofreither; Ulrich Langer; Satyendra K. Tomar (LSSC, 2009)

Domain decomposition solvers for nonlinear multiharmonic finite element equations. - Dylan M. Copeland; Ulrich Langer (J. Num. Math., 2010)

A Non-standard Finite Element Method Based on Boundary Integral Operators. - Clemens Hofreither; Ulrich Langer; Clemens Pechstein (LSSC, 2011)

Editorial. - Vadim G. Korneev; Yuri Kuznetsov; Ulrich Langer; Aleksandr M. Matsokin (Comput. Methods Appl. Math., 2012)

Topology optimization of electric machines based on topological sensitivity analysis. - Peter Gangl; Ulrich Langer (Comput. Vis. Sci., 2012)

A Robust Preconditioned MinRes Solver for Distributed Time-Periodic Eddy Current Optimal Control Problems. - Michael Kolmbauer; Ulrich Langer (SIAM J. Sci. Comput., 2012)

A robust finite element solver for a multiharmonic parabolic optimal control problem. - Markus Kollmann; Michael Kolmbauer; Ulrich Langer; Monika Wolfmayr; Walter Zulehner (Comput. Math. Appl., 2013)

A Robust Preconditioned MinRes Solver for Time-periodic Eddy Current Problems. - Michael Kolmbauer; Ulrich Langer (Comput. Methods Appl. Math., 2013)

Multiharmonic finite element analysis of a time-periodic parabolic optimal control problem. - Ulrich Langer; Monika Wolfmayr (J. Num. Math., 2013)

A Robust FEM-BEM Solver for Time-Harmonic Eddy Current Problems. - Michael Kolmbauer; Ulrich Langer (Domain Decomposition Methods in Science and Engineering XX, 2013)

Matrix Generation in Isogeometric Analysis by Low Rank Tensor Approximation. - Angelos Mantzaflaris; Bert Jüttler; Boris N. Khoromskij; Ulrich Langer (Curves and Surfaces, 2014)

Dirichlet-Dirichlet Domain Decomposition Methods for Elliptic Problems - h and hp Finite Element Discretizations - Vadim Glebovich Korneev; Ulrich Langer (Dirichlet-Dirichlet Domain Decomposition Methods for Elliptic Problems, 2015)

Algebraic Multigrid Based Preconditioners for Fluid-Structure Interaction and Its Related Sub-problems. - Ulrich Langer; Huidong Yang (LSSC, 2015)

Mesh grading in isogeometric analysis. - Ulrich Langer; Angelos Mantzaflaris; Stephen Edward Moore; Ioannis Toulopoulos (Comput. Math. Appl., 2015)

Editorial. - Ulrich Langer (Comput. Methods Appl. Math., 2015)

Functional A Posteriori Error Estimates for Parabolic Time-Periodic Boundary Value Problems. - Ulrich Langer; Sergey I. Repin; Monika Wolfmayr (Comput. Methods Appl. Math., 2015)

Analysis of multipatch discontinuous Galerkin IgA approximations to elliptic boundary value problems. - Ulrich Langer; Ioannis Toulopoulos (Comput. Vis. Sci., 2015)

Partitioned solution algorithms for fluid-structure interaction problems with hyperelastic models. - Ulrich Langer; Huidong Yang (J. Comput. Appl. Math., 2015)

Shape Optimization of an Electric Motor Subject to Nonlinear Magnetostatics. - Peter Gangl; Ulrich Langer; Antoine Laurain; Houcine Meftahi; Kevin Sturm (SIAM J. Sci. Comput., 2015)

Discontinuous Galerkin Isogeometric Analysis of Elliptic Diffusion Problems on Segmentations with Gaps. - Christoph Hofer; Ulrich Langer; Ioannis Toulopoulos (SIAM J. Sci. Comput., 2016)

Functional Type Error Control for Stabilised Space-Time IgA Approximations to Parabolic Problems. - Ulrich Langer; Svetlana Matculevich; Sergey I. Repin (LSSC, 2017)

Multipatch Space-Time Isogeometric Analysis of Parabolic Diffusion Problems. - Ulrich Langer; Martin Neumüller; Ioannis Toulopoulos (LSSC, 2017)

Guaranteed error control bounds for the stabilised space-time IgA approximations to parabolic problems. - Ulrich Langer; Svetlana Matculevich; Sergey I. Repin (CoRR, 2017)

Numerical simulation of fluid-structure interaction problems with hyperelastic models: A monolithic approach. - Ulrich Langer; Huidong Yang (Math. Comput. Simul., 2018)

Hierarchical DWR Error Estimates for the Navier-Stokes Equations: h and p Enrichment. - Bernhard Endtmayer; Ulrich Langer; Jan Philipp Thiele; Thomas Wick (ENUMATH, 2019)

Space-Time Finite Element Methods for Parabolic Initial-Boundary Value Problems with Non-smooth Solutions. - Ulrich Langer; Andreas Schafelner (LSSC, 2019)

Guaranteed error bounds and local indicators for adaptive solvers using stabilised space-time IgA approximations to parabolic problems. - Ulrich Langer; Svetlana Matculevich; Sergey I. Repin (Comput. Math. Appl., 2019)

Hierarchical DWR Error Estimates for the Navier Stokes Equation: h and p Enrichment. - Bernhard Endtmayer; Ulrich Langer; Jan Philipp Thiele; Thomas Wick (CoRR, 2019)

Multigoal-oriented error estimates for non-linear problems. - Bernhard Endtmayer; Ulrich Langer; Thomas Wick (J. Num. Math., 2019)

Parallel and Robust Preconditioning for Space-Time Isogeometric Analysis of Parabolic Evolution Problems. - Christoph Hofer; Ulrich Langer; Martin Neumüller; Rainer Schneckenleitner (SIAM J. Sci. Comput., 2019)

Isogeometric analysis on non-matching segmentation: discontinuous Galerkin techniques and efficient solvers. - Christoph Hofer; Ulrich Langer; Ioannis Toulopoulos (J. Appl. Math. Comput., 2019)

Multigoal-oriented optimal control problems with nonlinear PDE constraints. - Bernhard Endtmayer; Ulrich Langer; Ira Neitzel; Thomas Wick; Winnifried Wollner (Comput. Math. Appl., 2020)

Adaptive Space-Time Finite Element Methods for Non-autonomous Parabolic Problems with Distributional Sources. - Ulrich Langer; Andreas Schafelner (Comput. Methods Appl. Math., 2020)

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

Parallel matrix-free higher-order finite element solvers for phase-field fracture problems. - Daniel Jodlbauer; Ulrich Langer; Thomas Wick (CoRR, 2020)

Two-Side a Posteriori Error Estimates for the Dual-Weighted Residual Method. - Bernhard Endtmayer; Ulrich Langer; Thomas Wick (SIAM J. Sci. Comput., 2020)

Simultaneous Space-Time Finite Element Methods for Parabolic Optimal Control Problems. - Ulrich Langer; Andreas Schafelner (LSSC, 2021)

Reliability and Efficiency of DWR-Type A Posteriori Error Estimates with Smart Sensitivity Weight Recovering. - Bernhard Endtmayer; Ulrich Langer; Thomas Wick (Comput. Methods Appl. Math., 2021)

Space-time hexahedral finite element methods for parabolic evolution problems. - Ulrich Langer; Andreas Schafelner (CoRR, 2021)

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)

Efficient Direct Space-Time Finite Element Solvers for Parabolic Initial-Boundary Value Problems in Anisotropic Sobolev Spaces. - Ulrich Langer; Marco Zank (SIAM J. Sci. Comput., 2021)

Robust Discretization and Solvers for Elliptic Optimal Control Problems with Energy Regularization. - Ulrich Langer; Olaf Steinbach; Huidong Yang (Comput. Methods Appl. Math., 2022)

Robust space-time finite element error estimates for parabolic distributed optimal control problems with energy regularization. - Ulrich Langer; Olaf Steinbach; Huidong Yang (CoRR, 2022)

Adaptive space-time finite element methods for parabolic optimal control problems. - Ulrich Langer; Andreas Schafelner (J. Num. Math., 2022)

Robust Iterative Solvers for Algebraic Systems Arising from Elliptic Optimal Control Problems. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (LSSC, 2023)

Parallel iterative solvers for discretized reduced optimality systems. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (CoRR, 2023)

Recent Advances in Boundary Element Methods. - Ulrich Langer; Olaf Steinbach (Comput. Methods Appl. Math., 2023)

Robust Finite Element Discretization and Solvers for Distributed Elliptic Optimal Control Problems. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (Comput. Methods Appl. Math., 2023)

Goal-oriented adaptive space-time finite element methods for regularized parabolic p-Laplace problems. - Bernhard Endtmayer; Ulrich Langer; Andreas Schafelner (Comput. Math. Appl., 2024)

An adaptive finite element method for distributed elliptic optimal control problems with variable energy regularization. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (Comput. Math. Appl., 2024)

A Posteriori Single- and Multi-Goal Error Control and Adaptivity for Partial Differential Equations. - Bernhard Endtmayer; Ulrich Langer; Thomas Richter 003; Andreas Schafelner; Thomas Wick (CoRR, 2024)

Matrix-Free Monolithic Multigrid Methods for Stokes and Generalized Stokes Problems. - Daniel Jodlbauer; Ulrich Langer; Thomas Wick; Walter Zulehner (SIAM J. Sci. Comput., 2024)

Robust space-time finite element methods for parabolic distributed optimal control problems with energy regularization. - Ulrich Langer; Olaf Steinbach; Huidong Yang (Adv. Comput. Math., 2024)

Mass-lumping discretization and solvers for distributed elliptic optimal control problems. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (Numer. Linear Algebra Appl., 2024)

Robust finite element solvers for distributed hyperbolic optimal control problems. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (Comput. Math. Appl., 2025)

State-based nested iteration solution of optimal control problems with PDE constraints. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (CoRR, 2025)

State-based approach to the numerical solution of Dirichlet boundary optimal control problems for the Laplace equation. - Ulrich Langer; Richard Löscher; Olaf Steinbach; Huidong Yang (CoRR, 2025)