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: 1.92
Derivative convergence rate at refinement 0: 0.93
Function   convergence rate at refinement 1: 1.98
Derivative convergence rate at refinement 1: 0.98
Function   convergence rate at refinement 2: 2.00
Derivative convergence rate at refinement 2: 1.00