Bug in Mathematica 8 vs Mathematica 7: SeriesData
- To: mathgroup at smc.vnet.net
- Subject: [mg116820] Bug in Mathematica 8 vs Mathematica 7: SeriesData
- From: GidiL <gidienator at gmail.com>
- Date: Tue, 1 Mar 2011 05:23:24 -0500 (EST)
Dear All!
A long time ago I asked about the right way of using SeriesData for
multiple expansions.
For example, if you want a multiple expansion of a metric in general
relativity, it is quite simple to input:
SeriesData[r, Infinity, {-1, -2, -3}, 0, 3, 1]
In Mathematica 7 this line is accepted as is, without any error
messages or problems.
Yet, try this in Mathematica 8. You will get the following error
message:
SeriesData::sdatv: "First argument 1/r is not a valid variable."
Does anyone know what has changed in version 8? Why should such a
simple expression be invalid in version 8 but be OK in version 7? I
find it quite strange.
Would appreciate any help!
Cheerio,
Gideon