Re: Simplify

*To*: mathgroup at smc.vnet.net*Subject*: [mg58687] Re: Simplify*From*: "Scout" <not at nothing.net>*Date*: Thu, 14 Jul 2005 02:49:15 -0400 (EDT)*References*: <db2g9i$djm$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi. The fact that Mathematica doesn't simplify the expression with 1 is due to the operand of the Sqrt[] function that must be POSITIVE ( > 0)! If you try with that assumption the Simplify command carries out its work. ~Scout~ "paulvonhippel at yahoo" <paulvonhippel at yahoo.com> ha scritto nel messaggio news:db2g9i$djm$1 at smc.vnet.net... > I'm having some trouble getting an expression to simplify in an obvious > way. (There seems to be a long tradition of users posting to this group > with similar troubles.) > > The expression is > > poly = p (p - 1) b^2 + s^2 > prod = Sqrt [poly] Sqrt[1/poly] > Simplify[prod, {0 < p < 1, s > 0, bÏµReals}] > > which should return one, I think, but doesn't. > > I'd be grateful for suggestions. > > Thanks! > Paul >