       Re: Abs in the denominator

• To: mathgroup at smc.vnet.net
• Subject: [mg128560] Re: Abs in the denominator
• From: Bill Rowe <readnews at sbcglobal.net>
• Date: Fri, 2 Nov 2012 23:54:00 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Delivered-to: l-mathgroup@wolfram.com
• Delivered-to: mathgroup-newout@smc.vnet.net
• Delivered-to: mathgroup-newsend@smc.vnet.net

```On 11/2/12 at 12:45 AM, didi.vela at gmail.com (Dieter Ernst) wrote:

>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)]]

In:= 0.5/Abs[(C*R*omega)/(-1 + C*L*omega^2)] /.
0.5/Abs[b_] :> Abs[Simplify[.5/b]]

Out= Abs[(0.5*C*L*omega^2 - 0.5)/(C*omega*R)]

Not quite the output you indicated but perhaps close enough?

```

• Prev by Date: Group Elements: Changing permutation group cycles to more readable form
• Next by Date: Re: How can I solve this equation with Solve or Reduce or whatever for
• Previous by thread: Re: Abs in the denominator
• Next by thread: Re: Abs in the denominator