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Concepts is a set of classes written in C++ which allow solving elliptic partial differential equations using various methods. Most of Concepts is GPL. Available are hp-FEM, DGFEM and BEM (not currently released under GPL, maybe in a future release). More...

Download

2006-04-18: Release 2.1.1 is available: concepts-2.1.1.patch.gz (15k).
2004-09-17: Release 2.1.0 is available: concepts-2.1.0.tar.gz (2.0M), ChangeLog.
2004-06-10: The initial public release of Concepts is version 2.0.0: concepts-2.0.0.tar.gz (1.8M)

Contact and Development

Currently, Concepts is developed by various Ph.D. students at the Seminar for Applied Mathematics at the Department for Mathematics of ETH Zurich.

We have set up a mailing list. The developers also read this list, ie. it should be sufficient for all your questions. If you really need to contact somebody personally, ask Kersten.

Pictures

A whole page of pictures (meshes and convergence graphs) in two and three dimensions can be found on our results page for the Benchmarks for Maxwell (Benchmax).

Magnetic field in a Ring with a large and a tiny slit:

Magnetic field in a Ring with a large slit      Magnetic field in a Ring with a tiny slit

Two dimensional meshes:
Edge mesh in unit square Vertex mesh in L shaped domain Triangular mesh in L shaped domain

Two dimensional solution plot:
Singular solution in L shaped domain with hp-FEM

Three dimensional meshes:
Vertex and edge mesh in Fichera corner Edge mesh in thick L shaped domain Edge mesh in thick L shaped domain, σ=0.15

Movies

Behind the three pictures below, there are movies of three different basis functions in an anisotropically refined hp-FEM mesh in three dimensions. The movie shows a cut plane moving through the domain (a unit square), each is about 1MB large. Movie of basis function Movie of basis function Movie of basis function

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