Re: 2 questions about simplifications of expressions in MMA
- To: mathgroup at christensen.cybernetics.net
- Subject: [mg437] Re: [mg423] 2 questions about simplifications of expressions in MMA
- From: Lou Talman <me at talmanl.mscd.edu>
- Date: Mon, 30 Jan 95 08:48:56 -0700
On 29 Jan. 95, Fedor G. Pikus wrote:
> First of all, how do I make MMA understand that this
>
> 2
> e1 - Sqrt[(e1 - e2) ] - e2
> Out[12]= {----------------------------------- }
> 2 2
> Sqrt[(e1 - Sqrt[(e1 - e2) ] - e2) ]
>
> is really 1.
In point of fact, Mathematica is correct in not reducing this expression
to 1. When e1 is greater than or equal to e2, the expression is
undefined; when e1 is less than e2, the expression reduces to -1.
--Lou Talman
Metropolitan State College of Denver