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Re: Complex numbers in Mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg61669] Re: [mg61647] Complex numbers in Mathematica
• From: "Carl K. Woll" <carlw at wolfram.com>
• Date: Tue, 25 Oct 2005 01:28:03 -0400 (EDT)
• References: <200510250107.VAA16788@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Per Rønne wrote:
> If I write:
> 
> In[8]=Factor[(5 - 3I) + (-4 + I)x + (1 - I)x^2]
> 
> I get
> Nonreal::"warning": "Nonreal number encountered."
> Out[8]= Nonreal
> 
> The same with Sqrt[-1].
> 
> Why doesn't it show the complex numbers? According to the books it
> should - is it a matter of preferences set?
> 
> I'm using Mathematica Teacher's Edition 1.1 on MacOS X.

It appears that you have the package Miscellaneous`RealOnly` loaded.

Carl Woll
Wolfram Research

• References:
  • Complex numbers in Mathematica
    • From: per@RQNNE.invalid (Per Rønne)