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 Cheta with base-change: preliminary results jaydfox Long Time Fellow Posts: 440 Threads: 31 Joined: Aug 2007 08/12/2009, 07:02 PM (08/12/2009, 06:40 PM)bo198214 Wrote: I also just see that there is a function lagrange_polynomial in sage e.g. # using the definition of Lagrange interpolation polynomial sage: R = PolynomialRing(QQ, 'x') sage: R.lagrange_polynomial([(0,1),(2,2),(3,-2),(-4,9)]) I mean this should be super easy now. Just plug in your argument-value-pairs and you have the interpolating polynomial (no matrix fuzz). Then you can apply this interpolating polynomial to non-real values. Or extract the coefficients as you like. However I didnt check how long it takes Well that takes all the fun out of it, now doesn't it? But seriously, I'll try both approaches and see which is faster. ~ Jay Daniel Fox « Next Oldest | Next Newest »

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