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Re: "Nice" complex form

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131593] Re: "Nice" complex form
  • From: "Nasser M. Abbasi" <nma at 12000.org>
  • Date: Tue, 10 Sep 2013 03:32:46 -0400 (EDT)
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  • Reply-to: nma at 12000.org

On 9/8/2013 11:00 PM, sam.takoy at yahoo.com wrote:
> Hi,
>
> Can I get
>
> Assuming[a - 4 < 0, Sqrt[a - 4]]
>
> to "simplify" to
>
> I Sqrt[4 - a]
>
> ?
>
> Thanks,
>
> Sam
>
>

Assuming[a - 4 < 0, Simplify@ComplexExpand@Sqrt[a - 4]]
(* I Sqrt[4 - a] *)

--Nasser




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