Starting with ∆x = 0.01 and ∆t = 0.001, then increasing ∆t,
the calculations were interrupted for values of ∆t > 0.02. For a ratio of ∆t /∆x up to 2.0, the
calculations were successful. Increasing ∆x to 0.1, the calculations have been successful to values of ∆t up to 0.25, i.e., a ratio of ∆t /∆x of 2.5. For the small value of ∆x = 0.01, only the results of twenty elements out of hundred have been listed, in order to avoid having a very lengthy table