MathGroup Archive: July 2008 [00754]

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Re: bug? f'[x]'

To: mathgroup at smc.vnet.net
Subject: [mg90914] Re: [mg90894] bug? f'[x]'
From: DrMajorBob <drmajorbob at att.net>
Date: Tue, 29 Jul 2008 01:39:41 -0400 (EDT)
References: <22482780.1217263035440.JavaMail.root@m08>
Reply-to: drmajorbob at longhorns.com

The right side of both equations is meaningless in Mathematica, so of  
course they are not True.

For a version of the second one, we do have

D[f'[x], x] == f''[x]

True

Bobby

On Mon, 28 Jul 2008 06:53:58 -0500, <Benjamin.R.Lewis at gmail.com> wrote:

> G'day,
>
> In[]:= f'[x] =!= f[x]' && f''[x] === f'[x]'
> Out[]= True
>
> Can anyone explain this?
>
> -Ben
>
>



-- 
DrMajorBob at longhorns.com

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