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: 2.96
Derivative convergence rate at refinement 0: 1.93
Function   convergence rate at refinement 1: 2.96
Derivative convergence rate at refinement 1: 1.97
Function   convergence rate at refinement 2: 2.99
Derivative convergence rate at refinement 2: 1.99