Re: Re: equaltity of lists
- To: mathgroup at smc.vnet.net
- Subject: [mg19184] Re: [mg19162] Re: equaltity of lists
- From: "Tomas Garza" <tgarza at mail.internet.com.mx>
- Date: Tue, 10 Aug 1999 02:52:45 -0400
- Sender: owner-wri-mathgroup at wolfram.com
F. Mittermayr [mitterma at linz.vai.co.at] wrote:
> Why do I get the answer True when I ask Mathematica
>
> a=x; b=x^2/x;
> {a,b}=={b,a}
>
> Is it really true? What's about x=0?
Mathematica simplifies x^2/x, so that a = b = x, and {a, b} == {b, a} gives
True, in particular for x = 0. Check the value of b:
In[1]:=
a = x; b = x^2/x;
{a, b} == {b, a}
Out[2]=
True
In[3]:=
b
Out[3]=
x
Tomas Garza
Mexico City