RE: Sqrt[R^2]
- To: mathgroup at smc.vnet.net
- Subject: [mg42742] RE: [mg42716] Sqrt[R^2]
- From: "David Park" <djmp at earthlink.net>
- Date: Thu, 24 Jul 2003 04:10:45 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Sqrt[R^2] Simplify[%, R > 0] Sqrt[R^2] R You can also use PowerExpand, but that does no checking is not always correct. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Prechtl Josef [mailto:e9426270 at stud4.tuwien.ac.at] To: mathgroup at smc.vnet.net How can I instruct Mathematica when simplifying expressions to convert expressions e.g. Sqrt[R^2] into R? i.e. only to restrict to the case that the variable R is a positive real? thank you in advance for any help!