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: 1.1
Derivative convergence rate at refinement 0: 0.53
Function   convergence rate at refinement 1: 1.4
Derivative convergence rate at refinement 1: 0.71
Function   convergence rate at refinement 2: 1.7
Derivative convergence rate at refinement 2: 0.84