LAKE
A Lake Problem for FFP_SPARSE

The LAKE problem uses the geometry of a simulated lake with an island. This is an example of how to specify a problem to be solved by FFP_SPARSE.

• dirichlet_condition.m, the user-supplied routine to evaluate the boundary conditions;
• k_coef.m, the user-supplied routine to evaluate the linear coefficient;
• rhs.m, the user-supplied routine to evaluate the right hand side;
• lake.out, output from a run of the program;
• lake_nodes.txt, a text file containing a list, for each node, of its X and Y coordinates;
• lake_nodes.png, a PNG image of the nodes;
• lake_triangles.txt, a text file containing a list, for each element, of the three nodes that compose it;
• lake_triangles.png, a PNG image of the elements;
• lake_solution.txt, a text file containing the solution U at each node (X,Y);

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