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Re: Abs in the denominator

  • To: mathgroup at smc.vnet.net
  • Subject: [mg128555] Re: Abs in the denominator
  • From: Bob Hanlon <hanlonr357 at gmail.com>
  • Date: Fri, 2 Nov 2012 23:52:19 -0400 (EDT)
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expr = 0.5/Abs[(C*R*omega)/(-1 + C*L*omega^2)] // Rationalize;

expr = Abs[expr /. Abs -> Identity]

(1/2)*Abs[(-1 + C*L*omega^2)/
       (C*omega*R)]


Bob Hanlon


On Fri, Nov 2, 2012 at 12:45 AM, Dieter Ernst <didi.vela at gmail.com> wrote:
> Hello
>
> I have an expression with Abs applied to the entire denominator:
>
>       0.5/Abs[(C * R * omega)/(-1 + C * L * omega^2)]
>
> (Just as an example, the function in Abs could also be another one). How can I transform it to an expression with Abs wrapping the entire Fraction, such as:
>       Abs[0.5/((C * R * omega)/(-1 + C * L * omega^2))]
>
> ... and then to:
>       Abs[(0.5 * (-1 + C * L * omega^2) / (C * R * omega)]]
>



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