```python
import numpy as np
from fealpy.functionspace import FirstKindNedelecFiniteElementSpace2d
from fealpy.mesh import MeshFactory
from fealpy.boundarycondition import DirichletBC
from fealpy.erroranalysis import L2_error
from fealpy.show import showmultirate
from fealpy.functionspace import L2Error
from fealpy.mesh import MeshAdaptiveMethod
from fealpy.functionspace import NedelecEdgeElement
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