fem2d_bvp_linear_test, a FORTRAN90 code which calls fem2d_bvp_linear(), which applies the finite element method, with piecewise linear elements, to a 2D boundary value problem over a rectangle.
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fem2d_bvp_linear, a FORTRAN90 code which applies the finite element method (FEM), with piecewise bilinear elements, to a 2D boundary value problem (BVP) in a rectangle, and compares the computed and exact solutions with the L2 and seminorm errors.