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Re: Simplify


try
a  = -1
b = 2

In[7]:=
(a^b)^(1/b) /. {a -> -1, b -> 2}
Out[7]=
1

yous see: Sqrt[(-1)^2]  ==  1 != -1

maybee you wish the following
In[2]:=
(a^b)^(1/b) //PowerExpand
Out[2]=
a

--
---
Robert Nowak (robert.nowak at ims.co.at)
IMS Nanofabrication GmbH
A-1020 Wien, Schreygasse 3, Austria
Phone: (+43 1)2144894-32, Fax: (+43 1)2144894-99

<Matthias.Bode at oppenheim.de> wrote in message
news:9vmrje$hh7$1 at smc.vnet.net...
> Dear Colleagues,
>
> why should I not expect MATHEMATICA to (Full)Simplify
>
> (a^b)^(1/b) or a^b^(1/b) to a?
>
> Best regards,
>
> Matthias Bode
> Sal. Oppenheim jr. & Cie. KGaA
> Koenigsberger Strasse 29
> D-60487 Frankfurt am Main
> GERMANY
> Tel.: +49(0)69 71 34 53 80
> Mobile: +49(0)172 6 74 95 77
> Fax: +49(0)69 71 34 95 380
> E-mail: matthias.bode at oppenheim.de
> Internet: http://www.oppenheim.de
>
>
>




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