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MathGroup Archive 1999

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Simplify With Assumptions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg17931] Simplify With Assumptions
  • From: "David Park" <djmp at earthlink.net>
  • Date: Sat, 5 Jun 1999 02:56:02 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Simplify with assumptions in Version 4 is not everything one might
hope.

Simplify[Sqrt[x^2], x > 0]
x

But

Simplify[Sqrt[(1 + 2*t^2)^2/t^2], t > 0]
Sqrt[4 + 1/t^2 + 4*t^2]

not

(1 + 2*t^2)/t

Of course we can see for ourselves and PowerExpand. Yet one would have
hoped that Mathematica would have handled this case automatically.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/






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