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 > > > -- |===== | Curtis Osterhoudt | gardyloo at mail.wsu.edu | PGP Key ID: 0x235FDED1 | Please avoid sending me Word or PowerPoint attachments. | http://www.gnu.org/philosophy/no-word-attachments.html |=====

**References**:**sqrt(x^2) = x***From:*"Francisco Javier" <pacoga@ctv.es>