Ulrich Langer

Publication Activity (10 Years)

Years Active: 1991-2024
Publications (10 Years): 49

Top Topics

Differential Equations

Spatio Temporal

Error Estimates

Optimal Control

Top Venues

Comput. Methods Appl. Math.

SIAM J. Sci. Comput.

Publications

Bernhard Endtmayer, Ulrich Langer, Thomas Richter, Andreas Schafelner, Thomas Wick
A Posteriori Single- and Multi-Goal Error Control and Adaptivity for Partial Differential Equations. CoRR (2024)
Daniel Jodlbauer, Ulrich Langer, Thomas Wick, Walter Zulehner
Matrix-Free Monolithic Multigrid Methods for Stokes and Generalized Stokes Problems. SIAM J. Sci. Comput. 46 (3) (2024)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
An adaptive finite element method for distributed elliptic optimal control problems with variable energy regularization. Comput. Math. Appl. 160 (2024)
Ulrich Langer, Olaf Steinbach, Huidong Yang
Robust space-time finite element methods for parabolic distributed optimal control problems with energy regularization. Adv. Comput. Math. 50 (2) (2024)
Bernhard Endtmayer, Ulrich Langer, Andreas Schafelner
Goal-oriented adaptive space-time finite element methods for regularized parabolic p-Laplace problems. Comput. Math. Appl. 167 (2024)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Robust finite element solvers for distributed hyperbolic optimal control problems. CoRR (2024)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Parallel iterative solvers for discretized reduced optimality systems. CoRR (2023)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Robust Iterative Solvers for Algebraic Systems Arising from Elliptic Optimal Control Problems. LSSC (2023)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Robust Finite Element Discretization and Solvers for Distributed Elliptic Optimal Control Problems. Comput. Methods Appl. Math. 23 (4) (2023)
Ulrich Langer, Olaf Steinbach
Recent Advances in Boundary Element Methods. Comput. Methods Appl. Math. 23 (2) (2023)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Mass-lumping discretization and solvers for distributed elliptic optimal control problems. CoRR (2023)
Bernhard Endtmayer, Ulrich Langer, Andreas Schafelner
Goal-Oriented Adaptive Space-Time Finite Element Methods for Regularized Parabolic p-Laplace Problems. CoRR (2023)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
An adaptive finite element method for distributed elliptic optimal control problems with variable energy regularization. CoRR (2022)
Ulrich Langer, Olaf Steinbach, Huidong Yang
Robust space-time finite element error estimates for parabolic distributed optimal control problems with energy regularization. CoRR (2022)
Ulrich Langer, Richard Löscher, Olaf Steinbach, Huidong Yang
Robust finite element discretization and solvers for distributed elliptic optimal control problems. CoRR (2022)
Ulrich Langer, Andreas Schafelner
Adaptive space-time finite element methods for parabolic optimal control problems. J. Num. Math. 30 (4) (2022)
Daniel Jodlbauer, Ulrich Langer, Thomas Wick, Walter Zulehner
Matrix-free Monolithic Multigrid Methods for Stokes and Generalized Stokes Problems. CoRR (2022)
Ulrich Langer, Olaf Steinbach, Huidong Yang
Robust Discretization and Solvers for Elliptic Optimal Control Problems with Energy Regularization. Comput. Methods Appl. Math. 22 (1) (2022)
Ulrich Langer, Andreas Schafelner
Simultaneous space-time finite element methods for parabolic optimal control problems. CoRR (2021)
Ulrich Langer, Andreas Schafelner
Space-time hexahedral finite element methods for parabolic evolution problems. CoRR (2021)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Space-time finite element methods for the initial temperature reconstruction. CoRR (2021)
Bernhard Endtmayer, Ulrich Langer, Thomas Wick
Reliability and Efficiency of DWR-Type A Posteriori Error Estimates with Smart Sensitivity Weight Recovering. Comput. Methods Appl. Math. 21 (2) (2021)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Unstructured Space-Time Finite Element Methods for Optimal Control of Parabolic Equations. SIAM J. Sci. Comput. 43 (2) (2021)
Ulrich Langer, Andreas Schafelner
Simultaneous Space-Time Finite Element Methods for Parabolic Optimal Control Problems. LSSC (2021)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Space-Time Finite Element Discretization of Parabolic Optimal Control Problems with Energy Regularization. SIAM J. Numer. Anal. 59 (2) (2021)
Ulrich Langer, Olaf Steinbach, Huidong Yang
Robust discretization and solvers for elliptic optimal control problems with energy regularization. CoRR (2021)
Ulrich Langer, Marco Zank
Efficient Direct Space-Time Finite Element Solvers for Parabolic Initial-Boundary Value Problems in Anisotropic Sobolev Spaces. SIAM J. Sci. Comput. 43 (4) (2021)
Ulrich Langer, Andreas Schafelner
Adaptive space-time finite element methods for non-autonomous parabolic problems with distributional sources. CoRR (2020)
Daniel Jodlbauer, Ulrich Langer, Thomas Wick
Parallel matrix-free higher-order finite element solvers for phase-field fracture problems. CoRR (2020)
Ulrich Langer, Andreas Schafelner
Adaptive Space-Time Finite Element Methods for Non-autonomous Parabolic Problems with Distributional Sources. Comput. Methods Appl. Math. 20 (4) (2020)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Space-time finite element discretization of parabolic optimal control problems with energy regularization. CoRR (2020)
Bernhard Endtmayer, Ulrich Langer, Thomas Wick
Two-Side a Posteriori Error Estimates for the Dual-Weighted Residual Method. SIAM J. Sci. Comput. 42 (1) (2020)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Unstructured space-time finite element methods for optimal control of parabolic equations. CoRR (2020)
Ulrich Langer, Marco Zank
Efficient Direct Space-Time Finite Element Solvers for Parabolic Initial-Boundary Value Problems in Anisotropic Sobolev Spaces. CoRR (2020)
Bernhard Endtmayer, Ulrich Langer, Thomas Wick
Reliability and efficiency of DWR-type a posteriori error estimates with smart sensitivity weight recovering. CoRR (2020)
Ulrich Langer, Olaf Steinbach, Fredi Tröltzsch, Huidong Yang
Unstructured Space-Time Finite Element Methods for Optimal Sparse Control of Parabolic Equations. CoRR (2020)
Bernhard Endtmayer, Ulrich Langer, Ira Neitzel, Thomas Wick, Winnifried Wollner
Multigoal-oriented optimal control problems with nonlinear PDE constraints. Comput. Math. Appl. 79 (10) (2020)
Christoph Hofer, Ulrich Langer, Martin Neumüller, Rainer Schneckenleitner
Parallel and Robust Preconditioning for Space-Time Isogeometric Analysis of Parabolic Evolution Problems. SIAM J. Sci. Comput. 41 (3) (2019)
Christoph Hofer, Ulrich Langer, Ioannis Toulopoulos
Isogeometric analysis on non-matching segmentation: discontinuous Galerkin techniques and efficient solvers. J. Appl. Math. Comput. 61 (1-2) (2019)
Ulrich Langer, Andreas Schafelner
Space-Time Finite Element Methods for Parabolic Initial-Boundary Value Problems with Non-smooth Solutions. LSSC (2019)
Bernhard Endtmayer, Ulrich Langer, Thomas Wick
Multigoal-oriented error estimates for non-linear problems. J. Num. Math. 27 (4) (2019)
Bernhard Endtmayer, Ulrich Langer, Jan Philipp Thiele, Thomas Wick
Hierarchical DWR Error Estimates for the Navier-Stokes Equations: h and p Enrichment. ENUMATH (2019)
Bernhard Endtmayer, Ulrich Langer, Jan Philipp Thiele, Thomas Wick
Hierarchical DWR Error Estimates for the Navier Stokes Equation: h and p Enrichment. CoRR (2019)
Ulrich Langer, Svetlana Matculevich, Sergey I. Repin
Guaranteed error bounds and local indicators for adaptive solvers using stabilised space-time IgA approximations to parabolic problems. Comput. Math. Appl. 78 (8) (2019)
Ulrich Langer, Huidong Yang
Numerical simulation of fluid-structure interaction problems with hyperelastic models: A monolithic approach. Math. Comput. Simul. 145 (2018)
Ulrich Langer, Martin Neumüller, Ioannis Toulopoulos
Multipatch Space-Time Isogeometric Analysis of Parabolic Diffusion Problems. LSSC (2017)
Ulrich Langer, Svetlana Matculevich, Sergey I. Repin
Functional Type Error Control for Stabilised Space-Time IgA Approximations to Parabolic Problems. LSSC (2017)
Ulrich Langer, Svetlana Matculevich, Sergey I. Repin
Guaranteed error control bounds for the stabilised space-time IgA approximations to parabolic problems. CoRR (2017)
Christoph Hofer, Ulrich Langer, Ioannis Toulopoulos
Discontinuous Galerkin Isogeometric Analysis of Elliptic Diffusion Problems on Segmentations with Gaps. SIAM J. Sci. Comput. 38 (6) (2016)
Ulrich Langer, Ioannis Toulopoulos
Analysis of multipatch discontinuous Galerkin IgA approximations to elliptic boundary value problems. Comput. Vis. Sci. 17 (5) (2015)
Ulrich Langer
Editorial. Comput. Methods Appl. Math. 15 (4) (2015)
Ulrich Langer, Huidong Yang
Partitioned solution algorithms for fluid-structure interaction problems with hyperelastic models. J. Comput. Appl. Math. 276 (2015)
Ulrich Langer, Angelos Mantzaflaris, Stephen Edward Moore, Ioannis Toulopoulos
Mesh grading in isogeometric analysis. Comput. Math. Appl. 70 (7) (2015)
Ulrich Langer, Huidong Yang
Algebraic Multigrid Based Preconditioners for Fluid-Structure Interaction and Its Related Sub-problems. LSSC (2015)
Ulrich Langer, Sergey I. Repin, Monika Wolfmayr
Functional A Posteriori Error Estimates for Parabolic Time-Periodic Boundary Value Problems. Comput. Methods Appl. Math. 15 (3) (2015)
Peter Gangl, Ulrich Langer, Antoine Laurain, Houcine Meftahi, Kevin Sturm
Shape Optimization of an Electric Motor Subject to Nonlinear Magnetostatics. SIAM J. Sci. Comput. 37 (6) (2015)
Angelos Mantzaflaris, Bert Jüttler, Boris N. Khoromskij, Ulrich Langer
Matrix Generation in Isogeometric Analysis by Low Rank Tensor Approximation. Curves and Surfaces (2014)
Ulrich Langer, Monika Wolfmayr
Multiharmonic finite element analysis of a time-periodic parabolic optimal control problem. J. Num. Math. 21 (4) (2013)
Michael Kolmbauer, Ulrich Langer
A Robust Preconditioned MinRes Solver for Time-periodic Eddy Current Problems. Comput. Methods Appl. Math. 13 (1) (2013)
Markus Kollmann, Michael Kolmbauer, Ulrich Langer, Monika Wolfmayr, Walter Zulehner
A robust finite element solver for a multiharmonic parabolic optimal control problem. Comput. Math. Appl. 65 (3) (2013)
Michael Kolmbauer, Ulrich Langer
A Robust Preconditioned MinRes Solver for Distributed Time-Periodic Eddy Current Optimal Control Problems. SIAM J. Sci. Comput. 34 (6) (2012)
Vadim Korneev, Yuri Kuznetsov, Ulrich Langer, Aleksandr M. Matsokin
Editorial. Comput. Methods Appl. Math. 12 (4) (2012)
Peter Gangl, Ulrich Langer
Topology optimization of electric machines based on topological sensitivity analysis. Comput. Vis. Sci. 15 (6) (2012)
Clemens Hofreither, Ulrich Langer, Clemens Pechstein
A Non-standard Finite Element Method Based on Boundary Integral Operators. LSSC (2011)
Dylan M. Copeland, Ulrich Langer
Domain decomposition solvers for nonlinear multiharmonic finite element equations. J. Num. Math. 18 (3) (2010)
Clemens Hofreither, Ulrich Langer, Satyendra K. Tomar
Boundary Element Simulation of Linear Water Waves in a Model Basin. LSSC (2009)
Sven Beuchler, Tino Eibner, Ulrich Langer
Primal and Dual Interface Concentrated Iterative Substructuring Methods. SIAM J. Numer. Anal. 46 (6) (2008)
Ulrich Langer, Walter Zulehner, Huidong Yang, Markus Baumgartner
GStokes: A Grid-enabled Solver for the 3D Stokes/Navier-Stokes System on Hybrid Meshes. ISPDC (2007)
Huidong Yang, Walter Zulehner, Ulrich Langer, Markus Baumgartner
A robust PDE solver for the 3D Stokes/Navier-Stokes systems on the grid environment. GRID (2007)
Ulrich Langer, Günther Of, Olaf Steinbach, Walter Zulehner
Inexact Data-Sparse Boundary Element Tearing and Interconnecting Methods. SIAM J. Sci. Comput. 29 (1) (2007)
Ulrich Langer, D. Pusch
Comparison of Geometrical and Algebraic Multigrid Preconditioners for Data-Sparse Boundary Element Matrices. LSSC (2005)
Florian Bachinger, Ulrich Langer, Joachim Schöberl
Numerical analysis of nonlinear multiharmonic eddy current problems. Numerische Mathematik 100 (4) (2005)
Ulrich Langer, Olaf Steinbach
Boundary Element Tearing and Interconnecting Methods. Computing 71 (3) (2003)
Gundolf Haase, Michael Kuhn, Ulrich Langer
Parallel multigrid 3D Maxwell solvers. Parallel Comput. 27 (6) (2001)
Gundolf Haase, Ulrich Langer, Stefan Reitzinger, Joachim Schöberl
Algebraic multigrid methods based on element preconditioning. Int. J. Comput. Math. 78 (4) (2001)
Ulrich Langer, Stefan Reitzinger, Josef Schicho
Symbolic Methods for the Element Preconditioning Technique. SNSC (2001)
Ulrich Langer
Editorial. Numer. Linear Algebra Appl. 4 (3) (1997)
Gundolf Haase, Ulrich Langer, Arnd Meyer
The approximate Dirichlet Domain Decomposition method. Part II: Applications to 2nd-order Elliptic B.V.P.s. Computing 47 (2) (1991)
Gundolf Haase, Ulrich Langer, Arnd Meyer
The approximate Dirichlet Domain Decomposition method. Part I: An algebraic approach. Computing 47 (2) (1991)