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Re: entering an equation

• To: mathgroup at smc.vnet.net
• Subject: [mg21597] Re: [mg21592] entering an equation
• From: Ken Levasseur <Kenneth_Levasseur at uml.edu>
• Date: Sun, 16 Jan 2000 22:43:45 -0500 (EST)
• Organization: UMass Lowell Mathematical Sciences
• References: <200001160856.DAA10832@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Mark:

The real domain of Log[2, Log[2,x]] is x>1 and the message that you
copied below indicates that you were plotting at a positive value less
than one.

Ken Levasseur
Math Sci.
UMass Lowell

Mark Woolard wrote:
> 
> I am trying to plot a series of functions in Mathematica...one is giving me
> trouble. I need : ln2 (ln2 x)
> 
>     I enter: Log[2, Log[2,x]]
> 
> and I get:
> 
> is not a machine-size real \
> number at \!\(x\) = \!\(4.1666666666666667`*^-7\)."
> 
> Does anyone have any suggestions?