Hello, On Thu, 24 Feb 2011 09:58:59 +0300 "Alexey U. Gudchenko" <[email protected]> wrote:
> And I have some little question about Laurent. > > exp(1/x).series(x, oo) = 1 + 1/x + 1/(2*x**2) ... > > Is it Laurent or power series? In my use of maths language, this is a Laurent series as negative powers of x contribute. Power series (or, in this case, Taylor series) contain only exponents in [0; oo). So I would call this expansion a Laurent series about the point x=oo. Quickly browsing through the Mathematica 8 documentation, it seems that Mathematica does not offer more much functionality than SymPy does (or will do with that Series branch). The documentation also is fuzzy about terminology. It describes that Series[] gives a series that may be a (truncated ) Taylor series or another, more general type of series with generalized powers (such as fractional powers). I haven't found a command to explicitly generate Laurent series. Cheers Alex -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
