FEM2D_POISSON_SPARSE_ELL is a C++ library which sets up the geometry and data for a Poisson problem in an L-shaped region for solution by FEM2D_POISSON_SPARSE.
This mesh, which uses 65 nodes, was created by starting with a crude mesh, and having it refined by TRIANGULATION_REFINE and renumbered by TRIANGULATION_RCM.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
FEM2D_POISSON_SPARSE_ELL is available in a C++ version and a FORTRAN90 version and a MATLAB version.
FEM2D_POISSON_SPARSE, a C++ program which solves a 2D Poisson problem, using a sparse matrix solver, and user input.
FEM2D_POISSON_SPARSE_BAFFLE, a C++ library which defines the geometry of a rectangle channel containing 13 hexagonal baffles, as well as boundary conditions for a given Poisson problem, and is called by fem2d_poisson_sparse as part of a solution procedure.
FEM2D_POISSON_SPARSE_LAKE, a C++ library which defines the geometry of a lake-shaped region, as well as boundary conditions for a given Poisson problem, and is called by fem2d_poisson_sparse as part of a solution procedure.
You can go up one level to the C++ source code page.