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answered 2024-03-12 10:56:14 +0100
Use
plot(lambda x: EEF(x, 2), x, 0, 3)
See the detailed explanations from cell 28 in this tutorial notebook: https://nbviewer.org/github/egourgoulhon/SageMathTour/blob/master/Notebooks/plot_tour_2D.ipynb