Re: can't MATHEMATICA simplify simple expressions?

*To*: mathgroup at smc.vnet.net*Subject*: [mg51525] Re: [mg51505] can't MATHEMATICA simplify simple expressions?*From*: Matteo Delfino <delfino at studenti.ph.unito.it>*Date*: Thu, 21 Oct 2004 22:20:38 -0400 (EDT)*References*: <200410200521.BAA08484@smc.vnet.net>*Reply-to*: delfino at studenti.ph.unito.it*Sender*: owner-wri-mathgroup at wolfram.com

Cole Turner ha scritto: > if I enter: > > FullSimplify [ (a^2)^(3/2) ] > > (in correct MATHEMATICA syntax, the program does not yield the correct > result, a^3 ... > > why is that? > > thanks! Mathematica does not know whether "a" is a positive real number or not (it does not even know it is a number...),you must specify it with Assumptions (see mathematica help): FullSimplify[(a^2)^(3/2),a>0] yelds the correct result. regards Matteo Delfino

**References**:**can't MATHEMATICA simplify simple expressions?***From:*Cole Turner <REMOVEcole.tuner@liwest.at>