Function curl2D

python/test/unit/fem/test_interpolation.py:693–694

(u)

    v = Function(V)

    def curl2D(u):
        return ufl.as_vector((ufl.Dx(u[1], 0), -ufl.Dx(u[0], 1)))

    v.interpolate(Expression(curl2D(ufl.grad(w)), V.element.interpolation_points))
    h_ex = ufl.as_vector((1, -1))