Trygve Nilssen

T. K. Nilssen, G. A. Staff and K. Mardal

Order Optimal Preconditioners for Fully Implicit Runge-Kutta Schemes Applied to the Bidomain Equations

Numerical Methods for Partial Differential Equations

K. Mardal, T. K. Nilssen and G. A. Staff

Order Optimal Preconditioners for Implicit Runge-Kutta Schemes Applied to Parabolic PDE's

SIAM Journal on Scientific Computing

G. A. Staff, K. Mardal and T. K. Nilssen

Preconditioning of Fully Implicit Runge-Kutta Schemes for Parabolic PDEs

Model. Identif. Control

K. Mardal and T. K. Nilssen

Reuse of Standard Preconditioners for Higher-Order Time Discretizations of Parabolic PDEs

Journal of Numerical Mathematics

G. A. Staff, K. Mardal and T. K. Nilssen

Block Preconditioners for Fully Implicit Runge-Kutta Schemes Applied to the Bidomain Equations

ECCOMAS CFD 06

G. A. Staff, K. Mardal and T. K. Nilssen

Preconditioning of Fully Implicit Runge-Kutta Schemes for Parabolic PDEs

SIMS05. 46th Conference on Simulation and Modeling, Trondheim, October 13-14

T. K. Nilssen

RK methods biodomain

T. K. Nilssen

RK methods parabolic

T. K. Nilssen

Weakly Positve Definite Matrices

T. K. Nilssen, L. Ingebrigtsen, M. Hanslien, G. T. Lines and A. Tveito

Resolution Requirements for a 1D Monodomain Model for Simulating

T. K. Nilssen and K. Mardal

Reuse of Standard Preconditioners for Higher-Order Time Discretizations of Parabolic PDEs

Talk at the Eigth Copper Mountain Conference on Iterative Methods, Copper Mountain, CO, USA

L. Ingebrigtsen, T. K. Nilssen, H. P. Langtangen and A. Tveito

On the Accuracy of Operator Splitting for a Fluid-Structure Interaction Problem

International Journal of Nonlinear Sciences and Numerical Simulation

T. K. Nilssen, T. Mannseth and X. Tai

Permeability Estimation With the Augmented Lagrangian Method for a Nonlinear Diffusion Equation

Computational Geosciences

B. O. Heimsund, T. F. Chan, T. K. Nilssen and X. Tai

Level Set Methods for a Parameter Identification Problem

Analysis and optimization of differential systems

T. K. Nilssen and L. Ingebrigtsen

Grid Size Requirements for Simulation of Electrical Activity in the Heart

Talk at the Conference on Computational Science and Engineering, San Diego, CA, USA

T. Lyche, T. K. Nilssen and R. Winther

Preconditioned Iterative Methods for Scattered Data Interpolation

Advances in Computational Mathematics

T. K. Nilssen, X. Tai and R. Winther

A Robust Nonconforming H2-Element

Mathematics of Computation

T. K. Nilssen

Parameter Estimation With the Augmented Lagrangian Method and a Study of Some Fourth Order Problems

T. K. Nilssen, T. Mannseth and X. Tai

Permeability Estimation With the Augmented Lagrangian Method for Nonlinear Diffusion Equations

Talk at the International Parallel CFD 2001 Conference, Egmond aan Zee, The Netherlands

T. K. Nilssen

Methods for Efficient Recovering of Parameters

Talk at The 2000 Nordic computational differential equations circus, Bergen, Norway

T. K. Nilssen and R. Winther

Preconditioned Iterative Methods for Scattered Data Interpolation

Talk at the Mathematical Methods for Curves and Surfaces, Oslo, Norway