ConceptPythonBeginner Floating-point numbers: why 0.1 + 0.2 is not 0.3, and a derivative's best step h = np.logspace(-14, -1, 261)
ConceptPythonIntermediate Stiffness: why an explicit solver crawls on a reaction that has long settled t = np.logspace(-6, np.log10(40), 400)