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Re: Simplify problem

• To: mathgroup at smc.vnet.net
• Subject: [mg95851] Re: [mg95785] Simplify problem
• From: "David Park" <djmpark at comcast.net>
• Date: Wed, 28 Jan 2009 06:35:11 -0500 (EST)
• References: <11779144.1233058594460.JavaMail.root@m02>

One suggestion, and you'll probably get many.

expr = 1/Sqrt[1 + 1/x]
expr /. Power[y_, exp_] -> Power[1/y, -exp] // Simplify


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/  


From: tidy512 at googlemail.com [mailto:tidy512 at googlemail.com] 

Hi

I am using Simplify / FullSimplify etc. to simplify some equations
I have, but I am unable to coerce Mathematica into automatically
giving me the form I require for some of the sub-expressions, e.g.

I'd like

1/Sqrt[1 + 1/x]

to be automatically converted to

Sqrt[x/(1 + x)]

'x' is always of type Real and greater-than 0 btw.

I would appreciate any help or tips anyone can provide on this.

Thanks