import numpy as np

class Constant():
    def __init__(self, c):
        self.c

class FacetNormal():
    def __init__(self, mesh):
        self.mesh = mesh

class TestFunction():
    def __init__(self, space):
        self.space = space


class TrialFunction():
    def __init__(self, space):
        self.space = space



class dx():
    def __init__(self):
        pass


class ds():
    def __init__(self):
        pass



class BilinearForm():
    def __init__(self):
        pass

