Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1999
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1999

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: simple Simplify[] question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19790] Re: simple Simplify[] question
  • From: Adam Strzebonski <adams at wolfram.com>
  • Date: Fri, 17 Sep 1999 01:36:45 -0400
  • Organization: Wolfram Research, Inc.
  • References: <7rnkqn$emf@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Ulf Saalmann wrote:
> 
>  Hello,
> 
>  why gives Mathematica
>                                      2 3/2
>       Simplify[(a^2)^(3/2)]        (a )
> 
>  and not
>                                       3
>                                     a
> 
>  and how to convince Mathematica to do it?
> 
>  Thanks
>          Ulf  (us at atom.msi.se)

There are values of a for which
(a^2)^(3/2) is not equal to a^3.

In[5]:= {(a^2)^(3/2), a^3} /. a->-1
Out[5]= {1, -1}

In V4 you can give assumptions to Simplify, and if
you assume that a>=0 you get the simplification.

In[6]:= Simplify[(a^2)^(3/2), a>=0]

         3
Out[6]= a
 
Best Regards,

Adam Strzebonski
Wolfram Research


  • Prev by Date: AxesLabel touches the y-Axis
  • Next by Date: Re: searchforperiod
  • Previous by thread: Re: simple Simplify[] question
  • Next by thread: Re: simple Simplify[] question