Symbols:R/Non-Zero Real Numbers

Real Numbers

 * $\R_{\ne 0}$

The set of non-zero real numbers:
 * $\R_{\ne 0} = \R \setminus \set 0$

$\LaTeX$ also allows, but  does not recognise that as a valid code.

Variants

 * $\R^*$

The set of non-zero real numbers:
 * $\R^* = \R \setminus \set 0$

$\LaTeX$ also allows, but  does not recognise that as a valid code.