Re: Simplify problems for checking easy equalities...

*To*: mathgroup at smc.vnet.net*Subject*: [mg53861] Re: [mg53856] Simplify problems for checking easy equalities...*From*: "David Park" <djmp at earthlink.net>*Date*: Tue, 1 Feb 2005 04:08:11 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Cyrus, Include the proper assumptions in the Simplify statement. Simplify[Log[x^n] - n*Log[x], n \[Element] Integers && x > 0] 0 David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Cyrus Erik Eierud [mailto:cyruserik at tele2.se] To: mathgroup at smc.vnet.net Please Help! Thanks for all great answers I've already found here! My problem is that I can not simplify what to me seems as a very simple equality task. This is what I want Mathematica to return zero for: in[1]:= FullSimplify[Log[x^n] - n*Log[x]] out[1]= -n Log[x] + Log[x^n]) I have used Simplify to check equalities, but the one above (and many other equations similar to the one above) just don't simplify. Am I doing anything wrong or does anyone know of a better way to check equalities? Appreciate any help, Cyrus Eierud, Student cyruserik at tele2.se