Hello to everybody,
I was trying to solve a couple of differential equations with NDSolve, they are functions of "x", "z" and the time "t". As a initial condition I impose the function to be the Hyperbolic tangent of a gaussian at t = 0, but to my surprise when I use the function "Animate", at t = 0 the function is not exactly a the hyperbolic tangent of a gaussian but rather something close to it. Why this is so? Is it possible that Mathematica changes "arbitrarily" the inital conditions in order to make it easier to solve???
I attached the screenshots of the code I use to arrive to the solutions and the plot of the supposed Tanh of the Gaussian too. You will see is not exactly the Hyperbolic tangent of a gaussian.
Thanks a lot in advance!