On Monday, March 24, 2014 3:24:39 PM UTC, Ondřej Čertík wrote:
hi ondrej, thanks for replying, nice to see you're around in a different context, i remember your name vividly but not why :) > Can you define what you are trying to expand with respect to what? Your > "alpha", is it "alpha_oo" in the picture you sent? > yes. > Are you trying to expand "mu_e" with respect to alpha? > alpha/2pi, yes. > That will give you a series like: > > a0 + a1*alpha + a2*alpha^2 > > yep. > and then you can trivially divide each a0, a1, a2 by a power of (2*pi) to > get the series that you want. Yes, sympy should be able to do that. > > that hadn't occurred to me to do it that way. what i wanted to do was to try to preserve the expressions for each of a0, a1, a2, algebraically, but it's turning out to be uh... either rather cpu-intensive or just plain odd. instead i started evaluating the fractions into floating-point coefficients, but that then entirely defeated the object of the exercise, as absolutely any floating-point coefficients could be picked for a0, a1, a2... a15 etc. what this _has_ taught me is that i'm simply taking the wrong approach. which is useful information in itself. > Ondrej > > P.S. The project name is sympy, as in "symbolic python", not simpy. > whoops, that'd explain why my google searches went awry once or twice :) l. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/d99deac5-3840-41ac-9933-1c567972c5d8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
