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Factor, Extension

  • To: mathgroup at
  • Subject: [mg113768] Factor, Extension
  • From: janos <janostothmeister at>
  • Date: Thu, 11 Nov 2010 06:10:36 -0500 (EST)

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


Factor[x^2 - 2, Extension -> Automatic]

does not seem to work in the same way as

Factor[x^2 - 2, Extension -> Sqrt[2]]



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