Triangular IFISS

T-IFISS extends the IFISS philosophy to cover Galerkin approximation of scalar diffusion problems on triangular grids. Unstructured meshes are generated using the DistMesh package.

      The underlying theory is discussed in chapter 1 of the book:
      Finite Elements and Fast Iterative Solvers
      Howard Elman, David Silvester and Andy Wathen,
      ISBN 978-0-19-967879-2


Downloading TIFISS 1.1

TIFISS 1.1 is compatible with Windows, Linux and MacOS computers. The toolbox has been tested using Matlab version 9.1 (and is compatible with versions as far back as 6.5). The software package can be downloaded by clicking on one of the links below.


After you have unpacked the files, start Matlab in the directory tifiss1.1. Type install_tifiss and follow the on-screen instructions. After installation, type setpath, helpme to get started.

Licence Information

This library is free software. It can be redistributed and/or modified under the terms of the GNU Lesser General Public License as published by the Free Software Foundation ; either version 2.1 of the License, or any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, and without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. Your use or distribution of IFISS or any derivative code implies that you agree to this License.

Copyright (c) 2017 by David Silvester, Alex Bespalov, Qifeng Liao.