> > > > Symbolic manipulation, substitutions, simplification for basic physics > formulas. I have done some limited symbolics with Mathematica, but I just > had to retire for medical reasons and can't personally justify the cost. I > have heard good things about Sage symbolic manipulation capabilities, but > so far I have not seen any really good discussion on it, particularly for > the newest version. I apparently tried to join the Sage bandwagon right > when so many changes took place, and many older code examples just don't > seem to work right. If you had a discussion on symbolics it would be a > no-brainer to buy your latest edition. > >> >> That is true, as a more "advanced" section. See e.g. https://math.stackexchange.com/questions/2383818/sagemath-replace-an-expression-in-a-formula-by-a-function-define-previously for one of the many widely scattered examples of where to find info on doing this well :-(
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