Package freefem++-2.20-5

Freefem is a program for solving numerically partial differential equations. As its name tells, it is public domain software based on the Finite Element Method. This software runs on all Unix OS, on Window95, 98, 2000, NT, XP and on MacOS9 and X. Many phenomena involve several different fields. Fluid-structure interactions, Lorentz forces in liquid aluminium and ocean-atmosphere problems are three such systems. These require approximations of different degrees possibly on different meshes. Some algorithms such as Schwarz' domain decomposition method require also the interpolation of data on different meshes within one program. Freefem++ can handle these difficulties: Arbitrary finite element spaces on arbitrary unstructured and adaptated meshes. The characteristics of freefem++ are: - Many finite elements : linear and quadratic Lagrangian elements, discontinuous P1 and Raviart-Thomas elements, mini-element, ... - Automatic interpolation of data on different meshes to a super mesh - Definition of the linear problem with a formal variational form with access to the vectors and the matrix - Tools to define discontinuous Galerkin formulations - Automatic 2D mesh generator, based on the Delaunay-Voronoi algorithm - Anisotropic mesh adaptation - LU, Cholesky, Crout, CG, GMRES, UMFPACK linear solvers, and eigenvalue and eigenvector computations using ARPACK - Online graphics using either X11 or Aqua windows, C++ like syntax - Lots of examples

Three binaries are installed: - FreeFem++: Uses X11 windows for graphics - FreeFem++-CoCoa: Uses Aqua windows for graphics - FreeFem++-nw: No graphics The FreeFem++.app in /Applications/Fink uses Aqua windows for graphics. It is equivalent to FreeFem++-CoCoa, but *.edp files can also be double-clicked or dropped on the app icon. Many examples are in /sw/share/doc/freefem++. The documentation is in TeX form in /sw/share/doc/freefem++/DOC. To create the pdf manual, run the command sudo make -o Makefile freefem++doc.pdf in that directory. You need a complete LaTeX installation for this.