These notes are associated with the software release of T-IFISS.
This is a suite of m-files for solving steady diffusion problems in
a general two-dimensional geometry using the finite element method.
Unstructured mesh generation is effected using the DISTMESH package.
The T-IFISS package has five main ingredients:
o Discretisation with linear (P1) and quadratic (P2) elements
o Visualisation of the computed solution
o Built-in a posteriori error estimation of the generated solution.
o Self-adaptive solution driven by rigorous energy error estimation
o Iterative solvers can be tested on the resulting linear systems
Extra features in latest version:
. The diffusion coefficients are no longer assumed to be constant
when estimating the error using P1 approximation when solving
problems defined on square or L-shaped domains
. Local mesh refinement functionality is included in the directory
/diffusion_adaptive/
David Silvester
11 March 2017.