Re: sqrt(x^2) = x
- To: mathgroup at smc.vnet.net
- Subject: [mg61193] Re: [mg61154] sqrt(x^2) = x
- From: curtis <gardyloo at mail.wsu.edu>
- Date: Wed, 12 Oct 2005 01:42:38 -0400 (EDT)
- References: <200510110722.DAA15137@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
This *might* work for "simple" x -- I haven't tested it thoroughly.
Probably the gurus on the site will tell you about Hold on the sqrt
function. Anyway, on your output, try
output/.{Sqrt[a_^2]->a}
As far as I can tell, this will just pattern-match without regard as
to the positiveness or even realness of the argument a.
Cheers,
C.O.
Francisco Javier wrote:
>Dear all, I am new in this group
>
>How can I tell Mathematica that I want to simplify all expressions like
>Sqrt[x^2] as x, whithout taking into account that x is or not a
>positive real number?
>
>Thank you very much
>
>
>
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- References:
- sqrt(x^2) = x
- From: "Francisco Javier" <pacoga@ctv.es>
- sqrt(x^2) = x