help with exact command. [Solved]

[Spybot]

Yes, that's what I'm talking about, I didn't expect epsilon had something to do with the thing I was trying to do here, but I see it definitely has. in fact this is exactly what I was looking for, Thanks Didier.

A couple of hours ago I did notice that, no mater what changes I made to the HOME settings, they did't affect the way CAS was treating objects in my program. but since epsilon is a CAS setting, I see it does have an impact. Now I found a use for this setting(epsilon), which I used to consider as an untouched setting.

Thanks again for your help!