CHAPTER FOUR: number theory, a couple of exemples.
This is a lesson in a series of pari/gp tutorials. These are intended for people with a basic knowledge in programming. Pari/gp is a free computer algebra system. Get it at http://pari.math.u-bordeaux.fr/.
Background image: M.C. Escher, Still life & Street.
Music: J.S. Bach, prelude & fugue in F min from WTC II (BWV 881), played by Andras Schiff.
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