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Re: Strange behaviour of Simplify

  • To: mathgroup at smc.vnet.net
  • Subject: [mg79097] Re: Strange behaviour of Simplify
  • From: Andreas Maier <andimai at web.de>
  • Date: Wed, 18 Jul 2007 03:02:35 -0400 (EDT)
  • References: <f7caue$9bj$1@smc.vnet.net><f7f3ce$og4$1@smc.vnet.net>

On Jul 16, 8:31 am, Peter Pein <pet... at dordos.net> wrote:
> Andreas Maier schrieb:> Hi,
>
> > i'm trying to simplify the following expression
>
> > In:= gamma=c Sqrt[g00])/Sqrt[c^2 g00 + g11 v^2]
>
> ...
>
>
>
> > Why is Mathematica (I'm using V6.0) able to cancel Sqrt[g00], but is
> > not
> > able to cancel c?
>
> ...
>
> because there is not c but Sqrt[c^2] in the denominator (try an
> arbitrary c with Re[c] < 0).
>
> P=B2

But i tried to simplify with the assumption c>0 (I also tried
Sqrt[c^2]> 0). This should work, but it doesn't.
The only solution i found is the one posted by Andrzej Kozlowski.

Andreas Maier



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