Ragnar Winther

Publication Activity (10 Years)

Years Active: 1992-2024
Publications (10 Years): 11

Top Topics

Total Variation Minimization

Top Venues

Found. Comput. Math.

SIAM J. Numer. Anal.

Publications

Richard S. Falk, Ragnar Winther
The Bubble Transform and the de Rham Complex. Found. Comput. Math. 24 (1) (2024)
Richard S. Falk, Ragnar Winther
Local space-preserving decompositions for the bubble transform. CoRR (2023)
Richard S. Falk, Ragnar Winther
Construction of polynomial preserving cochain extensions by blending. Math. Comput. 92 (342) (2023)
Xue-Cheng Tai, Ragnar Winther, Xiaodi Zhang, Weiying Zheng
A Uniform Preconditioner for a Newton Algorithm for Total Variation Minimization and Minimum-Surface Problems. SIAM J. Numer. Anal. 61 (5) (2023)
Xue-Cheng Tai, Ragnar Winther, Xiaodi Zhang, Weiying Zheng
A uniform preconditioner for a Newton algorithm for total-variation minimization and minimum-surface problems. CoRR (2022)
Richard S. Falk, Ragnar Winther
Construction of polynomial preserving cochain extensions by blending. CoRR (2022)
Richard S. Falk, Ragnar Winther
The Bubble Transform and the de Rham Complex. CoRR (2021)
Jeonghun J. Lee, Ragnar Winther
Local coderivatives and approximation of Hodge Laplace problems. Math. Comput. 87 (314) (2018)
Jeonghun J. Lee, Kent-André Mardal, Ragnar Winther
Parameter-Robust Discretization and Preconditioning of Biot's Consolidation Model. SIAM J. Sci. Comput. 39 (1) (2017)
Trygve Bærland, Jeonghun J. Lee, Kent-André Mardal, Ragnar Winther
Weakly Imposed Symmetry and Robust Preconditioners for Biot's Consolidation Model. Comput. Methods Appl. Math. 17 (3) (2017)
Richard S. Falk, Ragnar Winther
The Bubble Transform: A New Tool for Analysis of Finite Element Methods. Found. Comput. Math. 16 (1) (2016)
Richard S. Falk, Ragnar Winther
Local bounded cochain projections. Math. Comput. 83 (290) (2014)
Kent-André Mardal, Joachim Schöberl, Ragnar Winther
A uniformly stable Fortin operator for the Taylor-Hood element. Numerische Mathematik 123 (3) (2013)
Kent-André Mardal, Ragnar Winther
Preconditioning discretizations of systems of partial differential equations. Numer. Linear Algebra Appl. 18 (1) (2011)
Qiya Hu, Xue-Cheng Tai, Ragnar Winther
A Saddle Point Approach to the Computation of Harmonic Maps. SIAM J. Numer. Anal. 47 (2) (2009)
Douglas N. Arnold, Gerard Awanou, Ragnar Winther
Finite elements for symmetric tensors in three dimensions. Math. Comput. 77 (263) (2008)
Snorre H. Christiansen, Ragnar Winther
Smoothed projections in finite element exterior calculus. Math. Comput. 77 (262) (2008)
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
Mixed finite element methods for linear elasticity with weakly imposed symmetry. Math. Comput. 76 (260) (2007)
Runhild A. Klausen, Ragnar Winther
Robust convergence of multi point flux approximation on rough grids. Numerische Mathematik 104 (3) (2006)
Kent-André Mardal, Ragnar Winther
An observation on Korn's inequality for nonconforming finite element methods. Math. Comput. 75 (253) (2006)
Snorre H. Christiansen, Ragnar Winther
On Constraint Preservation in Numerical Simulations of Yang-Mills Equations. SIAM J. Sci. Comput. 28 (1) (2006)
Kent-André Mardal, Ragnar Winther
Uniform preconditioners for the time dependent Stokes problem. Numerische Mathematik 103 (1) (2006)
Kent-André Mardal, Ragnar Winther
Uniform preconditioners for the time dependent Stokes problem. Numerische Mathematik 98 (2) (2004)
Douglas N. Arnold, Ragnar Winther
Mixed finite elements for elasticity. Numerische Mathematik 92 (3) (2002)
Kent-André Mardal, Xue-Cheng Tai, Ragnar Winther
A Robust Finite Element Method for Darcy-Stokes Flow. SIAM J. Numer. Anal. 40 (5) (2002)
Tom Lyche, Trygve K. Nilssen, Ragnar Winther
Preconditioned Iterative Methods for Scattered Data Interpolation. Adv. Comput. Math. 17 (3) (2002)
Trygve K. Nilssen, Xue-Cheng Tai, Ragnar Winther
-element. Math. Comput. 70 (234) (2001)
Einar Haug, Ragnar Winther
A domain embedding preconditioner for the Lagrange multiplier system. Math. Comput. 69 (229) (2000)
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
Multigrid in H (div) and H (curl). Numerische Mathematik 85 (2) (2000)
Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
Domain embedding preconditioners for mixed systems. Numer. Linear Algebra Appl. 5 (5) (1998)
Einar Haug, Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
Domain Embedding and the Dirichlet Problem. LSSC (1997)
Douglas N. Arnold, Richard S. Falk, Ragnar Winther
and applications. Math. Comput. 66 (219) (1997)
Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther
Interior penalty preconditioners for mixed finite element approximations of elliptic problems. Math. Comput. 65 (214) (1996)
Aslak Tveito, Ragnar Winther
The Solution of Nonstrictly Hyperbolic Conservation Laws May Be Hard to Compute. SIAM J. Sci. Comput. 16 (2) (1995)
Torgeir Rusten, Ragnar Winther
A Preconditioned Iterative Method for Saddlepoint Problems. SIAM J. Matrix Anal. Appl. 13 (3) (1992)