Ragnar Winther

36 papers Journal 34Unranked 1
YearRankTypeTitle / Venue / Authors
2024 J jnl
The Bubble Transform and the de Rham Complex.
Found. Comput. Math.
Richard S. Falk, Ragnar Winther
2023 J jnl
A Uniform Preconditioner for a Newton Algorithm for Total Variation Minimization and Minimum-Surface Problems.
SIAM J. Numer. Anal.
Xue-Cheng Tai, Ragnar Winther, Xiaodi Zhang, Weiying Zheng
2023 J jnl
Construction of polynomial preserving cochain extensions by blending.
Math. Comput.
Richard S. Falk, Ragnar Winther
2023 J jnl
Local space-preserving decompositions for the bubble transform.
CoRR
Richard S. Falk, Ragnar Winther
2022 J jnl
A uniform preconditioner for a Newton algorithm for total-variation minimization and minimum-surface problems.
CoRR
Xue-Cheng Tai, Ragnar Winther, Xiaodi Zhang, Weiying Zheng
2022 J jnl
Construction of polynomial preserving cochain extensions by blending.
CoRR
Richard S. Falk, Ragnar Winther
2021 J jnl
The Bubble Transform and the de Rham Complex.
CoRR
Richard S. Falk, Ragnar Winther
2018 J jnl
Local coderivatives and approximation of Hodge Laplace problems.
Math. Comput.
Jeonghun J. Lee, Ragnar Winther
2017 J jnl
Parameter-Robust Discretization and Preconditioning of Biot's Consolidation Model.
SIAM J. Sci. Comput.
Jeonghun J. Lee, Kent-André Mardal, Ragnar Winther
2017 J jnl
Weakly Imposed Symmetry and Robust Preconditioners for Biot's Consolidation Model.
Comput. Methods Appl. Math.
Trygve Bærland, Jeonghun J. Lee, Kent-André Mardal, Ragnar Winther
2016 J jnl
The Bubble Transform: A New Tool for Analysis of Finite Element Methods.
Found. Comput. Math.
Richard S. Falk, Ragnar Winther
2014 J jnl
Local bounded cochain projections.
Math. Comput.
Richard S. Falk, Ragnar Winther
2013 J jnl
A uniformly stable Fortin operator for the Taylor-Hood element.
Numerische Mathematik
Kent-André Mardal, Joachim Schöberl, Ragnar Winther
2011 J jnl
Preconditioning discretizations of systems of partial differential equations.
Numer. Linear Algebra Appl.
Kent-André Mardal, Ragnar Winther
2009 J jnl
A Saddle Point Approach to the Computation of Harmonic Maps.
SIAM J. Numer. Anal.
Qiya Hu, Xue-Cheng Tai, Ragnar Winther
2009 — ch.
CENS, CMA and the CENS-CMA Project.
Applied Wave Mathematics
Jüri Engelbrecht, Ragnar Winther, Ewald Quak
2008 J jnl
Finite elements for symmetric tensors in three dimensions.
Math. Comput.
Douglas N. Arnold, Gerard Awanou, Ragnar Winther
2008 J jnl
Smoothed projections in finite element exterior calculus.
Math. Comput.
Snorre H. Christiansen, Ragnar Winther
2007 J jnl
Mixed finite element methods for linear elasticity with weakly imposed symmetry.
Math. Comput.
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
2006 J jnl
An observation on Korn's inequality for nonconforming finite element methods.
Math. Comput.
Kent-André Mardal, Ragnar Winther
2006 J jnl
On Constraint Preservation in Numerical Simulations of Yang-Mills Equations.
SIAM J. Sci. Comput.
Snorre H. Christiansen, Ragnar Winther
2006 J jnl
Robust convergence of multi point flux approximation on rough grids.
Numerische Mathematik
Runhild A. Klausen, Ragnar Winther
2006 J jnl
Uniform preconditioners for the time dependent Stokes problem.
Numerische Mathematik
Kent-André Mardal, Ragnar Winther
2004 J jnl
Uniform preconditioners for the time dependent Stokes problem.
Numerische Mathematik
Kent-André Mardal, Ragnar Winther
2002 J jnl
A Robust Finite Element Method for Darcy-Stokes Flow.
SIAM J. Numer. Anal.
Kent-André Mardal, Xue-Cheng Tai, Ragnar Winther
2002 J jnl
Mixed finite elements for elasticity.
Numerische Mathematik
Douglas N. Arnold, Ragnar Winther
2002 J jnl
Preconditioned Iterative Methods for Scattered Data Interpolation.
Adv. Comput. Math.
Tom Lyche, Trygve K. Nilssen, Ragnar Winther
2001 J jnl
A robust nonconforming H
Math. Comput.
Trygve K. Nilssen, Xue-Cheng Tai, Ragnar Winther
2000 J jnl
A domain embedding preconditioner for the Lagrange multiplier system.
Math. Comput.
Einar Haug, Ragnar Winther
2000 J jnl
Multigrid in H (div) and H (curl).
Numerische Mathematik
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
1998 J jnl
Domain embedding preconditioners for mixed systems.
Numer. Linear Algebra Appl.
Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
1997 — conf
Domain Embedding and the Dirichlet Problem.
LSSC
Einar Haug, Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
1997 J jnl
Preconditioning in H
Math. Comput.
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
1996 J jnl
Interior penalty preconditioners for mixed finite element approximations of elliptic problems.
Math. Comput.
Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
1995 J jnl
The Solution of Nonstrictly Hyperbolic Conservation Laws May Be Hard to Compute.
SIAM J. Sci. Comput.
Aslak Tveito, Ragnar Winther
1992 J jnl
A Preconditioned Iterative Method for Saddlepoint Problems.
SIAM J. Matrix Anal. Appl.
Torgeir Rusten, Ragnar Winther