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MathGroup Archive 2006

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RE: Simplification with constraints

  • To: mathgroup at
  • Subject: [mg72060] RE: [mg72040] Simplification with constraints
  • From: "David Park" <djmp at>
  • Date: Sun, 10 Dec 2006 04:49:13 -0500 (EST)


What about

Eliminate[{expr == b*b + c*c + d*d, a*a + b*b + c*c + d*d == 1}, d]
expr == 1 - a^2

David Park
djmp at 

From: Vladimir [mailto:vladimir347 at]

Suppose we have a constraint:


What is the most elegant and general way to simplify any expression
considering above constraint for simplification?

For (just a simple) example:


should give:


thanks in advance,

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