Re: Factor, Extension
- To: mathgroup at smc.vnet.net
- Subject: [mg113777] Re: Factor, Extension
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Fri, 12 Nov 2010 05:27:05 -0500 (EST)
On 11 Nov 2010, at 12:10, janos wrote: > Dear All, > > What is the meaning of the help of Factor: > > Factor[poly,Extension->Automatic] will extend the domain of > coefficients to include any algebraic numbers that appear in poly. =BB > > if > > Factor[x^2 - 2, Extension -> Automatic] > > does not seem to work in the same way as > > Factor[x^2 - 2, Extension -> Sqrt[2]] > > Thanks, > > J=E1nos > Factor[x^2 - 2 Sqrt[2] x + 2] x^2-2 Sqrt[2] x+2 Factor[x^2 - 2 Sqrt[2] x + 2, Extension -> Automatic] (Sqrt[2]-x)^2 Andrzej Kozlowski