MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: silly questions?

  • To: mathgroup at
  • Subject: [mg59091] Re: silly questions?
  • From: dh <dh at>
  • Date: Thu, 28 Jul 2005 02:27:53 -0400 (EDT)
  • References: <dc77me$k74$>
  • Sender: owner-wri-mathgroup at

Hi Kent,
obviously, Mathematica considers
(x^5-32)/(x-2) simplier than
16 + 8*x + 4*x^2 + 2*x^3 + x^4
Consider that Mathematica must have some function to value the complexity of an 
expression. This function is called: "ComplexityFunction" and by default 
  counts the leafs. That explains the above. You may change this 
behaviour by specifying another function, see Help.

sincerely, Daniel

Kent Holing wrote:
> Why does not (x^5-32)/(x-2)//FullSimplify in Mathematica  work?
> Compare with Factor[x^5-32]//InputForm which returns (-2 + x)*(16 + 8*x + 4*x^2 + 2*x^3 + x^4).
> So why does not the first command just return 16 + 8*x + 4*x^2 + 2*x^3 + x^4?
> As in a factorization above, how is the easiest way to pick automatically (by a function) the factors of say degree >=2,  if any ?
> Kent Holing

  • Prev by Date: Re: Simplification question
  • Next by Date: Re: Simplification question
  • Previous by thread: Re: silly questions?
  • Next by thread: Re: silly questions?