ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Sun, 15 Jan 2017 08:16:30 -0600Derivative of O(x^0)http://ask.sagemath.org/question/36301/derivative-of-ox0/Consider a power series
R.<x> = PowerSeries(SR)
f = 1 + O(x^2)
f.derivative()
This gives us `O(x^1)` as we would expect. However, if we do
f = O(x^0)
f.derivative()
we get `O(x^-1)` instead of `O(x^0)` again. Is this a bug or am I missing something?NullInfinitySun, 15 Jan 2017 08:16:30 -0600http://ask.sagemath.org/question/36301/Differentiation of a power series.http://ask.sagemath.org/question/8334/differentiation-of-a-power-series/I wonder whether it is too hard to implement the derivative function for multivariate Power Series Ring. Since it is already implemented for one variable, is it not possible to implement it for multivariable, by treating the ring in one var over the ring in other vars.
e.g.
QQ[[x,y,z]] = QQ[[x,y]][z]]
Thanks and regards
--VInayVInay WaghTue, 20 Sep 2011 02:07:06 -0500http://ask.sagemath.org/question/8334/