Function tests pass for order 0 at tolerance 1e-10 Function tests pass for order 0 derivatives at tolerance 1e-10 Function convergence rate at refinement 0: 1.7 Derivative convergence rate at refinement 0: 1.2 Function convergence rate at refinement 1: 2.2 Derivative convergence rate at refinement 1: 1.5 Function convergence rate at refinement 2: 2.5 Derivative convergence rate at refinement 2: 1.7