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ORCIDRagnar Winther
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- affiliation: University of Oslo, Department of Mathematics, Norway
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Journal Articles
- 2024
[j30]Richard S. Falk, Ragnar Winther:
The Bubble Transform and the de Rham Complex. Found. Comput. Math. 24(1): 99-147 (2024)- 2023
- [j29]Richard S. Falk, Ragnar Winther:
Construction of polynomial preserving cochain extensions by blending. Math. Comput. 92(342): 1575-1594 (2023) - [j28]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): 2062-2083 (2023) - 2018
- [j27]Jeonghun J. Lee, Ragnar Winther:
Local coderivatives and approximation of Hodge Laplace problems. Math. Comput. 87(314): 2709-2735 (2018) - 2017
- [j26]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): 377 (2017) - [j25]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) - 2016
- [j24]Richard S. Falk, Ragnar Winther:
The Bubble Transform: A New Tool for Analysis of Finite Element Methods. Found. Comput. Math. 16(1): 297-328 (2016) - 2014
- [j23]Richard S. Falk, Ragnar Winther:
Local bounded cochain projections. Math. Comput. 83(290): 2631-2656 (2014) - 2013
- [j22]Kent-André Mardal, Joachim Schöberl, Ragnar Winther:
A uniformly stable Fortin operator for the Taylor-Hood element. Numerische Mathematik 123(3): 537-551 (2013) - 2011
- [j21]Kent-André Mardal, Ragnar Winther:
Preconditioning discretizations of systems of partial differential equations. Numer. Linear Algebra Appl. 18(1): 1-40 (2011) - 2009
- [j20]Qiya Hu, Xue-Cheng Tai, Ragnar Winther:
A Saddle Point Approach to the Computation of Harmonic Maps. SIAM J. Numer. Anal. 47(2): 1500-1523 (2009) - 2008
- [j19]Snorre H. Christiansen, Ragnar Winther:
Smoothed projections in finite element exterior calculus. Math. Comput. 77(262): 813-829 (2008) - [j18]Douglas N. Arnold, Gerard Awanou, Ragnar Winther:
Finite elements for symmetric tensors in three dimensions. Math. Comput. 77(263): 1229-1251 (2008) - 2007
- [j17]Douglas N. Arnold, Richard S. Falk, Ragnar Winther:
Mixed finite element methods for linear elasticity with weakly imposed symmetry. Math. Comput. 76(260): 1699-1723 (2007) - 2006
- [j16]Kent-André Mardal, Ragnar Winther:
An observation on Korn's inequality for nonconforming finite element methods. Math. Comput. 75(253): 1-6 (2006) - [j15]Kent-André Mardal, Ragnar Winther:
Uniform preconditioners for the time dependent Stokes problem. Numerische Mathematik 103(1): 171-172 (2006) - [j14]Runhild A. Klausen, Ragnar Winther:
Robust convergence of multi point flux approximation on rough grids. Numerische Mathematik 104(3): 317-337 (2006) - [j13]Snorre H. Christiansen, Ragnar Winther:
On Constraint Preservation in Numerical Simulations of Yang-Mills Equations. SIAM J. Sci. Comput. 28(1): 75-101 (2006) - 2004
- [j12]Kent-André Mardal, Ragnar Winther:
Uniform preconditioners for the time dependent Stokes problem. Numerische Mathematik 98(2): 305-327 (2004) - 2002
- [j11]Tom Lyche, Trygve K. Nilssen, Ragnar Winther:
Preconditioned Iterative Methods for Scattered Data Interpolation. Adv. Comput. Math. 17(3): 237-256 (2002) - [j10]Douglas N. Arnold, Ragnar Winther:
Mixed finite elements for elasticity. Numerische Mathematik 92(3): 401-419 (2002) - [j9]Kent-André Mardal, Xue-Cheng Tai, Ragnar Winther:
A Robust Finite Element Method for Darcy-Stokes Flow. SIAM J. Numer. Anal. 40(5): 1605-1631 (2002) - 2001
- [j8]Trygve K. Nilssen, Xue-Cheng Tai, Ragnar Winther:
A robust nonconforming H2-element. Math. Comput. 70(234): 489-505 (2001) - 2000
- [j7]Einar Haug, Ragnar Winther:
A domain embedding preconditioner for the Lagrange multiplier system. Math. Comput. 69(229): 65-82 (2000) - [j6]Douglas N. Arnold, Richard S. Falk, Ragnar Winther:
Multigrid in H (div) and H (curl). Numerische Mathematik 85(2): 197-217 (2000) - 1998
- [j5]Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther:
Domain embedding preconditioners for mixed systems. Numer. Linear Algebra Appl. 5(5): 321-345 (1998) - 1997
- [j4]Douglas N. Arnold, Richard S. Falk, Ragnar Winther:
Preconditioning in Hdiv and applications. Math. Comput. 66(219): 957-984 (1997) - 1996
- [j3]Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther:
Interior penalty preconditioners for mixed finite element approximations of elliptic problems. Math. Comput. 65(214): 447-466 (1996) - 1995
- [j2]Aslak Tveito, Ragnar Winther:
The Solution of Nonstrictly Hyperbolic Conservation Laws May Be Hard to Compute. SIAM J. Sci. Comput. 16(2): 320-329 (1995) - 1992
- [j1]Torgeir Rusten, Ragnar Winther:
A Preconditioned Iterative Method for Saddlepoint Problems. SIAM J. Matrix Anal. Appl. 13(3): 887-904 (1992)
Conference and Workshop Papers
- 1997
- [c1]Einar Haug, Torgeir Rusten, Panayot S. Vassilevski, Ragnar Winther:
Domain Embedding and the Dirichlet Problem. LSSC 1997: 66-77
Parts in Books or Collections
- 2009
- [p1]Jüri Engelbrecht, Ragnar Winther, Ewald Quak:
CENS, CMA and the CENS-CMA Project. Applied Wave Mathematics 2009: 1-6
Informal and Other Publications
- 2023
- [i4]Richard S. Falk, Ragnar Winther:
Local space-preserving decompositions for the bubble transform. CoRR abs/2312.13161 (2023) - 2022
- [i3]Richard S. Falk, Ragnar Winther:
Construction of polynomial preserving cochain extensions by blending. CoRR abs/2202.02811 (2022) - [i2]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 abs/2208.01390 (2022) - 2021
- [i1]Richard S. Falk, Ragnar Winther:
The Bubble Transform and the de Rham Complex. CoRR abs/2111.08123 (2021)
Coauthor Index
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