Poisson tests

This is a collection of standard benchmarks for multigrid for the Poisson equation.

\( - \Delta u = f \)

We employ \( f= \).

To prepare these tests, please first set the environment variable as

 export PYTHONPATH=../../../python:../../../src

Test single-level low order CG solver (d-linear shape functions)

Test single-level DG solver

Test ...