# Quick question on notation

Gold Member

## Main Question or Discussion Point

I was wondering how to express "x is a real number and not 1". What's the best way to express this? Right now I'm using...

$$x \epsilon \mathbb{R} \wedge x \neq 1$$

But I'm sure there's a better way.

chiro
I was wondering how to express "x is a real number and not 1". What's the best way to express this? Right now I'm using...

$$x \epsilon \mathbb{R} \wedge x \neq 1$$

But I'm sure there's a better way.
Use the notation x = R \ {1}

Gold Member
Use the notation x = R \ {1}
Got it, thanks!